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Question 81
A user reports that their desktop PC emits a continuous series of beeps on startup and fails to boot. Which of the following is the first component a technician should check?
( A ) RAM modules
( B ) Hard drive
( C ) CPU
( D ) GPU
Answer: A
Explanation:
Continuous beep codes during system startup are a strong indication of memory-related issues, specifically involving the RAM modules. When a computer powers on, the motherboard performs the Power-On Self-Test (POST) to verify that critical components are functioning correctly. If the BIOS detects a problem with the RAM, it emits a series of beep codes to alert the user. These codes vary depending on the motherboard manufacturer, but continuous or repeated beeps typically point directly to faulty or improperly installed memory.
The first step in troubleshooting is to inspect the RAM modules physically. Technicians should remove the modules from their slots and check for visible signs of damage, corrosion, or dust. Even minor debris can prevent proper electrical contact, causing the system to fail POST. After cleaning the slots and modules, each RAM stick should be reseated firmly to ensure proper connection with the motherboard. Testing each module individually can help identify a faulty stick and determine whether the issue is with a specific module or a slot on the motherboard.
Other components like the hard drive, CPU, or GPU generally do not produce continuous beep codes during POST. While a failing hard drive can prevent the system from booting into the operating system, it usually does not affect the initial POST sequence. Similarly, CPU and GPU failures often trigger different error codes or result in a completely blank screen without the characteristic beep pattern.
Only after confirming that the RAM is functioning correctly should a technician consider inspecting other components. If tests reveal a faulty RAM module, replacement is the most effective solution. Ensuring that the replacement is compatible with the motherboard and correctly installed prevents repeated startup failures and helps maintain system stability. Addressing RAM issues first streamlines troubleshooting, avoids unnecessary replacement of functioning hardware, and ensures that the system operates reliably.
Question 82
A user reports that their laptop battery drains rapidly after updating to a newer operating system version. Which of the following is the best first step?
( A ) Check for background processes consuming power
( B ) Replace the battery immediately
( C ) Disable Wi-Fi permanently
( D ) Reinstall the display driver
Answer: A
Explanation:
Rapid battery drain following an operating system update is commonly linked to background processes consuming excessive system resources. When updates install new features, services, or apps, some processes may run continuously or more intensively than before, leading to higher power consumption. The first step for a technician is to examine battery usage statistics or system monitoring tools to identify which applications or system services are using the most energy. Typical culprits include automatic update services, indexing processes, cloud synchronization tools, or newly installed applications that are not yet optimized.
Replacing the battery immediately may not address the root cause if the drain is software-related. A battery that was functioning properly before the update may still be fully capable of holding a charge, so replacing it without confirming a hardware failure is unnecessary and inefficient. Evaluating software-related causes first ensures the technician can resolve the issue without incurring additional costs or replacing functioning hardware.
Disabling Wi-Fi permanently is not a practical solution. While Wi-Fi usage can contribute to battery consumption, it is rarely the primary cause of rapid drain. Users rely on wireless connectivity for essential functions, and turning it off permanently would significantly reduce device usability without fully addressing the underlying problem.
Reinstalling the display driver generally has minimal impact on overall battery life. Display drivers primarily affect graphics performance and stability rather than background resource consumption. Unless the driver is causing abnormal GPU usage, reinstalling it is unlikely to resolve rapid battery drain issues.
The most effective approach is to identify and manage high-power-consuming background processes, adjust power settings such as sleep and display timeout, and optimize system configurations. This method restores expected battery performance, prolongs battery lifespan, and ensures the device maintains its intended portability and usability. Careful monitoring and targeted adjustments prevent unnecessary hardware replacement while improving energy efficiency and overall system stability.
Question 83
A desktop user reports that the computer frequently freezes, and applications become unresponsive. Which of the following is the first step to troubleshoot this issue?
( A ) Check Task Manager for high CPU or memory usage
( B ) Replace the hard drive immediately
( C ) Update the monitor driver
( D ) Reinstall antivirus software
Answer: A
Explanation:
Frequent system freezes are often caused by excessive CPU or memory usage from background processes, poorly optimized applications, or malware. When a computer becomes unresponsive, the first step for a technician is to assess resource consumption using Task Manager or similar system monitoring tools. These tools provide real-time data on CPU, memory, disk, and network usage, allowing the technician to identify processes that are consuming disproportionate amounts of system resources. Common causes include resource-heavy applications running in the background, unnecessary startup programs, software conflicts, or hidden malware processes that continuously use CPU cycles and memory.
Replacing the hard drive immediately is generally not warranted in cases of system freezes unless diagnostic tests indicate a failing storage device, such as read/write errors, bad sectors, or unusual noises from the drive. Most freezing issues are software- or memory-related rather than caused by the storage medium itself. Prematurely replacing the hard drive could result in unnecessary costs and downtime without addressing the root cause.
Updating the monitor driver does not directly influence CPU or memory performance. Monitor drivers primarily affect display functionality, color accuracy, and resolution, and they do not contribute to the excessive resource consumption that leads to system freezes. Similarly, reinstalling antivirus software may help prevent malware infections, but unless the malware is actively consuming system resources, it will not directly resolve freezing caused by high CPU or memory usage.
By monitoring system processes, the technician can identify applications or services responsible for performance bottlenecks. Once identified, problematic processes can be terminated, reconfigured, or updated to reduce resource usage. Additionally, optimizing startup programs and background services can prevent recurring freezes. This method ensures that system stability is restored efficiently, avoiding unnecessary hardware replacements and maintaining overall system performance. Proactive management of CPU and memory resources is essential for reliable operation and sustained productivity.
Question 84
A user cannot connect to a wireless network, although the laptop can detect other networks. Which of the following is the most likely cause?
( A ) Incorrect network password or security settings
( B ) Faulty monitor
( C ) Low battery
( D ) Damaged USB ports
Answer: A
Explanation:
When a laptop can detect available wireless networks but fails to connect to a specific one, the issue is most commonly related to incorrect network credentials or mismatched security settings. Wireless networks are protected using various encryption protocols such as WPA2 or WPA3, and the device attempting to connect must use the correct password and matching security configuration. If the password is entered incorrectly or the security protocol on the laptop does not match the router settings, the connection will fail even though the network appears in the available list. The technician should first verify that the SSID selected is correct, confirm that the password is entered accurately, and ensure that the security type configured on the laptop aligns with the router’s settings.
Hardware issues like a faulty monitor do not interfere with the wireless adapter’s ability to authenticate or communicate with the network. While a low battery may reduce overall device performance or trigger power-saving modes that limit certain functions, it generally does not prevent a laptop from connecting to a Wi-Fi network entirely. Similarly, damaged USB ports would affect only devices connected through those ports, such as external adapters or peripherals, and would not impact the internal wireless network card’s functionality unless the Wi-Fi adapter itself is USB-based and connected through a faulty port.
By focusing on network credentials and security configurations first, a technician can efficiently isolate and resolve connectivity issues without unnecessary hardware replacements. Ensuring proper network authentication helps maintain secure access to resources and prevents repeated connection failures. Additionally, reviewing encryption protocols and network settings ensures compatibility between the laptop and router, avoiding intermittent connection problems. Properly diagnosing the root cause through network verification and settings adjustment restores reliable wireless connectivity, allowing the user to access network resources efficiently and securely.
Question 85
A user reports that their laptop screen flickers intermittently. Which of the following steps should a technician perform first?
( A ) Verify the display driver and cable connections
( B ) Replace the keyboard
( C ) Upgrade the CPU
( D ) Reinstall the antivirus software
Answer: A
Explanation:
Screen flickering on a laptop or desktop monitor is usually related to issues with the display hardware or graphics drivers rather than peripheral devices or system software. One of the most common causes is a loose, damaged, or improperly connected display cable. The cable connecting the display panel to the motherboard or graphics card can become partially detached, have bent pins, or suffer wear over time, leading to intermittent signal transmission that manifests as flickering. The technician should inspect these physical connections carefully, ensuring that the cable is seated correctly and free from visible damage. Reseating the cable or replacing it if damaged often resolves the problem.
Another frequent cause of screen flickering is a problem with the display driver. Outdated, corrupted, or incompatible drivers can prevent the graphics adapter from communicating properly with the operating system, resulting in inconsistent refresh rates, image tearing, or flickering. Updating the driver to the latest version provided by the manufacturer or reinstalling the existing driver ensures proper functionality and compatibility with the operating system. This step often resolves flickering issues without any need for hardware replacement.
Replacing the keyboard or upgrading the CPU does not address screen flickering, as these components are unrelated to graphics output. The keyboard affects input, and the CPU manages general processing tasks, neither of which directly influence the display signal. Similarly, reinstalling antivirus software has no impact on graphics performance, as security applications do not interact with the display hardware or drivers in a way that would cause flickering.
By focusing on display cables and driver management first, a technician can efficiently isolate the root cause of the flickering. Proper attention to these areas restores stable visual output, improves usability, and prevents further stress on the hardware, ensuring that the laptop or monitor delivers consistent and reliable performance. Regular maintenance and timely driver updates help maintain display stability over time.
Question 86
A user complains that their desktop emits smoke shortly after powering on. Which of the following should a technician do first?
( A ) Immediately power off and unplug the system
( B ) Attempt to boot the system again
( C ) Update the BIOS
( D ) Replace the monitor
Answer: A
Explanation:
When smoke is observed coming from a desktop computer, it signals a critical hardware failure that requires immediate attention. The primary concern in this situation is safety. The first action should be to power off the system immediately and unplug it from the electrical outlet. This step prevents further electrical damage, avoids the risk of fire, and ensures that the technician or user is not exposed to potential electric shock. Smoke can result from overheating components, short circuits, or failed hardware parts, and continuing to operate the system could exacerbate these issues.
Attempting to boot the system again is highly unsafe and should be avoided. Powering on a device that is already exhibiting smoke can lead to more severe damage, including permanent destruction of components or even a fire. The risk to personal safety and surrounding property is significant, and no troubleshooting steps should involve applying power until the source of the smoke is identified and addressed.
Updating the BIOS in this scenario does not mitigate hardware failure or prevent smoke. BIOS updates are software-level fixes intended for improving compatibility, fixing bugs, or enhancing system features, and they cannot resolve physical component malfunctions. Similarly, replacing the monitor is unrelated because the display device is not a likely source of smoke inside the desktop system. Monitor replacement would not address the underlying hardware problem causing the hazard.
After ensuring the system is safely powered down, a technician can inspect the internal components, including the power supply, motherboard, graphics card, and other connected devices, for signs of burnt circuits, melted connectors, or physical damage. Proper safety procedures such as grounding, working in a well-ventilated area, and using protective equipment are essential during inspection. Identifying the affected components accurately prevents further damage, ensures the safety of both the user and technician, and provides a controlled approach to repairing or replacing damaged hardware.
Question 87
A user reports that their smartphone cannot send or receive emails, but all other apps function normally. Which of the following is the most likely cause?
( A ) Incorrect email account configuration
( B ) Damaged touchscreen
( C ) Weak GPS signal
( D ) Outdated camera app
Answer: A
Explanation:
When a smartphone or computer is able to access the internet but fails to send or receive emails, the issue is usually related to incorrect email account configuration. This can include wrong server addresses, invalid authentication credentials, or mismatched security protocols such as SSL or TLS. The technician should begin by verifying the email account credentials, ensuring that the username and password are correct. Next, the incoming and outgoing mail server settings should be checked for accuracy, including server addresses, port numbers, and security types. Ensuring these settings match the email service provider’s requirements is essential for successful communication.
A damaged touchscreen does not prevent the device from connecting to an email server or synchronizing messages. While a touchscreen may affect input or navigation, it does not influence the actual transfer of emails between the device and the server. Similarly, a weak GPS signal is unrelated to email functionality. GPS primarily affects location-based services and navigation apps, so any signal weakness would not interfere with sending or receiving messages.
An outdated camera application also has no impact on email functionality. While the camera app might be used to capture images for attachment, the app itself does not control the email client or its ability to connect to the server. Therefore, updating or reinstalling the camera app will not resolve issues with email delivery.
By focusing on email account configuration, a technician can efficiently restore email functionality. Checking server settings, credentials, and security options ensures proper synchronization between the device and mail servers. Proper configuration prevents repeated errors such as failed logins, authentication errors, or synchronization failures. Addressing these software-level issues first avoids unnecessary hardware interventions and maintains the user’s ability to communicate efficiently for personal or professional purposes. Ensuring accurate account settings is the most direct and effective way to resolve email connectivity problems.
Question 88
A desktop PC fails to boot and displays a “PXE-E61” error. Which of the following is the first step a technician should take?
( A ) Verify the boot order in BIOS
( B ) Replace the RAM
( C ) Update the video driver
( D ) Reinstall the operating system
Answer: A
Explanation:
A PXE-E61 error typically occurs when a computer attempts to boot from a network because it cannot detect a valid local boot device. This often happens during startup when the system performs the Power-On Self-Test (POST) and fails to locate the operating system on the internal storage device. The first step in troubleshooting this error is to verify the boot order in the BIOS settings. The technician should ensure that the internal hard drive or SSD containing the operating system is set as the primary boot device. If the boot order is incorrectly configured, the system may continually attempt to boot from the network, resulting in repeated PXE-E61 errors.
Replacing RAM is generally unnecessary in this situation. While faulty memory can cause system instability or prevent the computer from completing POST, it does not typically trigger PXE-E61 errors. RAM issues usually manifest as random crashes, blue screens, or failure to boot entirely, rather than as network boot attempts.
Updating the video driver also does not address PXE-E61 errors. Video drivers control display functionality and graphics performance but have no influence over the system’s ability to detect storage devices during boot. Therefore, focusing on video drivers will not resolve this type of startup problem.
Reinstalling the operating system is only relevant after confirming that the boot device is properly recognized. If the BIOS correctly detects the internal drive but the system still fails to boot, a corrupted operating system might be the cause. In that case, reinstalling the OS can restore functionality. However, attempting an OS reinstall before verifying BIOS settings could lead to unnecessary steps and potential data loss.
By prioritizing verification of BIOS boot order and ensuring the correct drive is selected, the technician can address the root cause of PXE-E61 errors efficiently. This approach restores normal startup, prevents repeated network boot attempts, and ensures that the system operates reliably without unnecessary hardware replacement or software reinstallation.
Question 89
A user reports that their laptop overheats quickly during normal use. Which of the following should a technician inspect first?
( A ) Cooling system and airflow
( B ) Hard drive health
( C ) Network adapter
( D ) Installed antivirus software
Answer: A
Explanation:
Laptop overheating is a common issue often caused by problems with the cooling system and airflow. Modern laptops rely on a combination of heat sinks, cooling fans, and proper ventilation to dissipate heat generated by the CPU, GPU, and other components. Dust accumulation inside vents, clogged airways, or malfunctioning fans can significantly reduce cooling efficiency, causing the laptop to overheat during normal use or under heavy processing loads. The technician should begin by inspecting the internal cooling components, cleaning out dust from vents and heat sinks, and verifying that all fans are functioning correctly. Ensuring that thermal paste between the CPU or GPU and heat sinks is applied properly can also improve heat transfer and reduce operating temperatures.
While hard drive health is important for overall system performance, it generally does not cause overheating. A failing hard drive may result in slow data access, system freezes, or error messages, but it contributes minimally to thermal buildup. Similarly, the network adapter has very little impact on heat generation. Network cards typically consume minimal power and produce negligible heat compared to the CPU and GPU.
Installed antivirus software, while important for security, also has a minor effect on thermal conditions. Running scans may temporarily increase CPU usage, but it does not generate sustained overheating unless combined with existing cooling inefficiencies.
Focusing on cooling system maintenance ensures that heat is effectively managed and prevents thermal throttling, where the CPU or GPU reduces performance to avoid damage. Proper airflow and functional fans not only maintain stable system operation but also extend the lifespan of internal components and improve user comfort by keeping the device cooler during use. Addressing cooling and airflow issues first allows the laptop to operate reliably under multitasking conditions or processor-intensive applications, avoiding unnecessary hardware replacements or performance compromises.
Question 90
A user reports that their wireless mouse frequently disconnects, while other Bluetooth devices work normally. Which of the following is the most likely cause?
( A ) Low battery or interference in the mouse
( B ) Damaged monitor
( C ) Full hard drive
( D ) Incorrect screen resolution
Answer: A
Explanation:
Wireless mouse disconnections are a common issue that can significantly disrupt user productivity. One of the primary causes is low battery power. As wireless mice rely on batteries to operate, weak or drained batteries can lead to intermittent connectivity or complete device failure. Replacing the batteries with fresh ones or testing the mouse on another system helps determine if power is the root cause. Additionally, wireless mice operate on specific radio frequencies, typically 2.4 GHz. Interference from other devices using the same frequency, such as Wi-Fi routers, cordless phones, microwaves, or Bluetooth peripherals, can disrupt communication between the mouse and its receiver. Adjusting the placement of the receiver, relocating nearby electronic devices, or switching to a less congested frequency can restore stable operation.
A damaged monitor does not impact the functionality of a wireless mouse. While a malfunctioning display may affect visual output, it has no influence on input devices, which operate independently of the screen. Similarly, a full hard drive does not cause wireless connectivity issues. Although a nearly full drive can slow system performance, it does not interfere with the signal between a mouse and its receiver. Incorrect screen resolution affects how content is displayed on the monitor, but it has no bearing on the performance or connectivity of input devices like a mouse.
To maintain reliable mouse functionality, a technician should first verify battery health, inspect the device for physical damage, and check for potential sources of wireless interference. Updating mouse drivers or firmware can also improve compatibility and responsiveness. By focusing on the most common causes—power and interference—users can quickly resolve connectivity problems without unnecessary hardware replacements. Ensuring stable performance of wireless peripherals supports efficient workflows, smooth navigation, and consistent productivity in both office and home environments, allowing users to work effectively without repeated interruptions from input device issues.
Question 91
A user reports that their desktop computer runs slowly and experiences frequent hard drive activity. Which of the following should a technician check first?
( A ) Resource-intensive processes and storage usage
( B ) Monitor calibration
( C ) CPU temperature
( D ) Audio driver settings
Answer: A
Explanation:
Frequent hard drive activity accompanied by slow system performance is often indicative of underlying issues with system resource management and storage utilization. Modern operating systems rely on both RAM and disk storage to manage active processes, and when either is under pressure, the system can become sluggish. Excessive background processes, such as software updates, cloud synchronization, indexing services, or poorly optimized applications, can consume significant disk input/output (I/O) capacity. This high I/O activity results in continuous hard drive operation, leading to delays in user tasks and overall system responsiveness. A technician should begin troubleshooting by examining Task Manager or a similar system monitoring tool to identify processes consuming large amounts of CPU, memory, or disk resources. Terminating or optimizing these processes often mitigates the issue.
Insufficient storage space can exacerbate slow performance, as operating systems use free disk space for virtual memory or paging files when physical RAM is fully utilized. If available disk space is low, the system may struggle to manage active processes, resulting in frequent disk activity. Addressing storage issues by clearing unnecessary files or expanding disk capacity can restore normal operation.
Monitor calibration does not affect system performance. While improper calibration may impact color accuracy or visual clarity, it does not contribute to high disk usage or slow response times. Similarly, audio driver settings are unrelated to storage activity or system speed, and CPU temperature, though important for system stability, is not the primary factor if the hard drive is continuously active. High CPU temperature may lead to thermal throttling, but in the presence of abnormal disk usage, the root cause is typically resource-intensive processes or insufficient storage.
Proper analysis of system resource allocation, storage utilization, and background processes allows the technician to optimize performance efficiently. By focusing on these key areas, users experience faster response times, reduced system lag, and more efficient multitasking, ensuring a productive computing environment without unnecessary hardware replacements or disruptions.
Question 92
A laptop user reports that their touchpad is unresponsive after a recent software update. Which of the following should the technician do first?
( A ) Check and reinstall touchpad drivers
( B ) Replace the screen
( C ) Replace the battery
( D ) Adjust the screen resolution
Answer: A
Explanation:
Touchpad malfunctions following operating system updates are commonly linked to issues with device drivers. Updates can sometimes overwrite, corrupt, or disable drivers, leading to unresponsive or erratic touchpad behavior. The first step in addressing this problem is to check the touchpad driver status in Device Manager or the appropriate system settings. If the driver is outdated, missing, or flagged with an error, the technician should reinstall or update it to the latest compatible version. This ensures that the touchpad communicates correctly with the operating system and functions as intended. Enabling the touchpad in system settings, if it has been disabled, is also a necessary step, as updates can occasionally reset hardware configurations.
Replacing the laptop screen does not address touchpad issues because the screen is unrelated to the input subsystem. Similarly, replacing the battery is ineffective for resolving touchpad malfunctions unless the device has specific power delivery issues that indirectly affect performance, which is rare. Adjusting screen resolution may influence display clarity but has no impact on the functionality of the touchpad. Focusing on unrelated hardware changes wastes time and resources without resolving the underlying issue.
Proper management of drivers ensures that peripheral devices remain compatible with system updates and prevents operational inconsistencies. Reinstalling or updating the touchpad driver can resolve responsiveness problems, restore multi-touch gestures, and maintain accuracy in pointer movement. Regular verification of driver integrity is an essential part of system maintenance, particularly after major operating system updates or patches. By addressing the software layer first, the technician avoids unnecessary hardware replacements, reduces downtime, and maintains a seamless user experience. Diagnosing touchpad issues at the driver level ensures that the system operates efficiently and that input devices remain fully functional in all typical usage scenarios, supporting productivity and user satisfaction.
Question 93
A user reports that their smartphone cannot connect to a corporate Wi-Fi network, but home networks work fine. Which of the following is the most likely cause?
( A ) Incorrect enterprise security settings or certificates
( B ) Low battery
( C ) Damaged touchscreen
( D ) Outdated camera firmware
Answer: A
Explanation:
Corporate Wi-Fi networks often implement advanced security protocols, such as WPA2-Enterprise or WPA3-Enterprise, which require proper authentication and valid digital certificates. Devices attempting to connect to these networks must have the correct security settings, including matching encryption methods, correct user credentials, and up-to-date certificates issued by the organization’s authentication server. If these parameters are misconfigured or missing, the device will fail to connect even though other wireless networks may function normally. The technician’s first step should be to verify that the device is using the correct enterprise settings, confirm that the proper certificates are installed, and ensure that the authentication method aligns with the network requirements.
Low battery is unlikely to prevent connection to a Wi-Fi network. While critically low power may cause some devices to enter a power-saving mode that limits connectivity, in most cases the network will still be detectable. Similarly, a damaged touchscreen does not interfere with wireless network functionality, as the touch interface is unrelated to the network adapter. Outdated camera firmware is completely unrelated to Wi-Fi access and will not affect the device’s ability to authenticate or maintain a connection. Focusing on these unrelated components would not address the underlying connectivity issue and could result in unnecessary troubleshooting or hardware replacement.
Properly configuring enterprise network settings ensures that devices can securely access corporate resources while adhering to IT policies. Technicians should verify credentials, confirm encryption standards, and update certificates as needed to comply with network authentication protocols. Ensuring correct configuration prevents repeated connection failures, protects sensitive organizational data, and supports seamless productivity for end users. Diagnosing and resolving enterprise Wi-Fi issues at the configuration level avoids unnecessary hardware replacements and helps maintain consistent, secure access across all authorized devices within the corporate environment.
Question 94
A desktop computer suddenly loses all power. Which of the following should a technician check first?
( A ) Power supply connections and surge protection
( B ) Hard drive health
( C ) Monitor settings
( D ) Audio driver
Answer: A
Explanation:
Sudden power loss in a desktop computer is often indicative of an issue with the power delivery system rather than internal components such as storage or peripherals. The primary cause can be a faulty power supply unit (PSU), which may fail to provide stable voltage or may shut down under load. Loose or improperly connected power cables are another common reason, as they can interrupt the flow of electricity to critical components. Additionally, a tripped surge protector or a nonfunctional electrical outlet can cut power unexpectedly. The technician should first check that all power cables are firmly connected to the motherboard, PSU, and peripherals, and that the PSU switch is turned on. Testing the outlet with another device or verifying the functionality of the surge protector ensures that external power delivery is stable and adequate.
Issues like hard drive failure, monitor settings, or audio driver malfunctions are unrelated to complete power loss. A failing hard drive (B) may prevent the system from booting or cause crashes, but it does not stop electrical flow to the system. Similarly, monitor settings (C) or an audio driver (D) affect only visual and audio output and cannot cause the system to lose power entirely. Focusing troubleshooting efforts on these areas would not address the root cause of sudden shutdowns and could result in unnecessary component replacement.
Ensuring proper power supply connections and reliable surge protection safeguards the desktop’s internal components and prevents potential damage from voltage fluctuations. Verifying PSU functionality and the integrity of cables reduces the risk of unexpected shutdowns, protects expensive hardware, and maintains system uptime. A stable and correctly configured electrical setup is essential for reliable operation, particularly in environments with frequent power fluctuations or critical computing tasks. Addressing power-related issues at the source allows technicians to restore full functionality efficiently without wasting time or resources on unrelated hardware or software components.
Question 95
A user reports that their laptop cannot detect Bluetooth devices after a recent OS upgrade. Which of the following should the technician check first?
( A ) Bluetooth drivers and device status
( B ) Hard drive health
( C ) Screen resolution
( D ) Audio driver settings
Answer: A
Explanation:
Bluetooth connectivity problems after an operating system update are commonly linked to driver issues. The update can introduce incompatibilities between the new OS and existing Bluetooth drivers, or it may overwrite or corrupt the current driver installation. The technician should begin by checking whether the Bluetooth adapter is enabled in the system settings and in Device Manager. Verifying driver status ensures that the system recognizes the device correctly. If the driver is outdated, missing, or flagged with errors, reinstalling or updating the driver is the most effective solution. This process restores communication between the operating system and the Bluetooth hardware, allowing devices such as wireless headphones, mice, keyboards, and other peripherals to connect reliably.
Other potential factors like hard drive health, screen resolution, or audio driver settings generally do not impact Bluetooth functionality. A failing hard drive (B) may cause system crashes or slow performance, but it does not interfere with wireless connections. Screen resolution issues (C) affect display quality and visual output but have no role in the operation of wireless communication devices. Similarly, audio driver settings (D) may influence sound output, but they do not affect the Bluetooth stack or the ability of the system to pair with external devices.
By focusing on Bluetooth drivers and device status, the technician addresses the most likely cause of connectivity problems without unnecessary hardware replacement. Reinstalling or updating the correct drivers ensures that the operating system can properly manage the Bluetooth adapter, handle device pairing, and maintain a stable connection. Testing the Bluetooth functionality after driver updates confirms that the issue is resolved. Maintaining updated and compatible drivers is essential for reliable peripheral operation, minimizing disruptions in workflow, and ensuring that wireless devices perform optimally. Proper troubleshooting and driver maintenance provide a quick and cost-effective solution to Bluetooth connectivity issues after system updates.
Question 96
A desktop user reports a “Blue Screen of Death” error with a stop code indicating a driver conflict. Which of the following is the first step in troubleshooting?
( A ) Boot into Safe Mode and update or roll back drivers
( B ) Replace the hard drive
( C ) Replace the monitor
( D ) Adjust screen resolution
Answer: A
Explanation:
A Blue Screen of Death (BSOD) often occurs when the operating system encounters a critical error, and driver conflicts are a common cause. Drivers act as intermediaries between hardware and software, and if a recently installed or updated driver is incompatible or corrupt, it can destabilize the system. The first step in addressing such issues is to boot the computer into Safe Mode. Safe Mode loads only essential system drivers and services, preventing problematic drivers from starting and allowing the technician to safely diagnose the source of the crash.
Once in Safe Mode, the technician can examine Device Manager to identify drivers that may have been recently updated or are marked with errors. Updating these drivers to the latest manufacturer-supported versions can resolve compatibility issues. Alternatively, rolling back drivers to a previously stable version restores system functionality if the latest updates caused the BSOD. This targeted approach ensures that only the drivers responsible for instability are addressed, minimizing unnecessary changes to the system.
Replacing the hard drive is not a solution for driver-related BSODs, as the issue lies in software communication rather than storage hardware. Similarly, replacing the monitor does not address driver conflicts, as display hardware is unlikely to trigger a system-wide crash unless its driver is directly implicated. Adjusting screen resolution is also unrelated; while it affects display output, it does not influence system stability or driver compatibility.
By focusing on Safe Mode and driver management, the technician can restore system stability efficiently while preserving user dat( A ) Proper handling of driver conflicts ensures that the operating system operates smoothly, reduces the likelihood of repeated crashes, and maintains compatibility with all connected hardware. Safe Mode provides a controlled environment for diagnosing and correcting software-related issues without risking further system damage.
Question 97
A user complains that their desktop emits unusual noises, and fans run at high speed continuously. Which of the following is the first component a technician should inspect?
( A ) CPU and case fans
( B ) Hard drive
( C ) Monitor
( D ) Keyboard
Answer: A
Explanation:
Unusual noises accompanied by high-speed fan operation in a desktop or laptop often signal that the system is experiencing thermal stress. The CPU and case fans are primary components responsible for maintaining optimal temperatures within the system. When these fans are obstructed by dust, debris, or hair, or when they begin to malfunction due to wear, they may spin at higher speeds in an attempt to dissipate heat. Persistent high-speed operation can also generate noticeable noise, which may indicate that the cooling system is under strain or failing to maintain adequate airflow.
The first step for a technician is to inspect both the CPU fan and the case fans. This involves visually checking for dust accumulation, ensuring fan blades spin freely, and confirming that connectors are properly seated. Cleaning fans and vents with compressed air, removing dust from heat sinks, and verifying that the fans are functioning within manufacturer specifications can significantly reduce noise and improve cooling efficiency. In some cases, replacing a failing fan may be necessary if it does not operate correctly despite cleaning.
Other components, such as the hard drive, monitor, and keyboard, generally do not contribute to continuous fan activity. While a failing hard drive may produce its own mechanical noises, it does not directly influence fan speed. Monitors and keyboards are external devices that do not generate thermal load inside the system chassis, so they are unrelated to fan behavior.
Proper maintenance of CPU and case fans not only reduces noise but also prevents overheating, which can lead to thermal throttling, reduced system performance, and long-term damage to critical components. Ensuring efficient airflow and stable thermal conditions allows the system to operate reliably under load, prolongs hardware lifespan, and enhances user comfort by reducing unnecessary noise. Regular inspection and cleaning of cooling components are essential for maintaining both system stability and performance.
Question 98
A laptop screen remains blank after pressing the power button, but the system powers on. Which of the following should the technician check first?
( A ) Display connections and brightness settings
( B ) Hard drive status
( C ) Network connectivity
( D ) Audio output
Answer: A
Explanation:
A blank screen while the system shows signs of activity, such as power lights or fan movement, typically points to problems with the display rather than the core functionality of the system. The primary factors to investigate are display connections, backlight operation, and brightness settings. Loose or improperly seated internal display cables can prevent the monitor from receiving video signals, resulting in a black screen even though the system is operational. The technician should open the laptop or desktop to ensure that the video cable is securely connected to both the motherboard and the display panel.
Brightness settings also play a critical role. If the brightness is set to the lowest level, the screen may appear completely black, giving the impression that the display is non-functional. Adjusting the brightness through keyboard shortcuts or the system’s display settings can quickly resolve this issue. Additionally, checking external display output is important to determine whether the internal display panel or the graphics subsystem is functioning correctly. Connecting the system to an external monitor can confirm if the problem is isolated to the laptop screen or internal cables.
Other components, such as the hard drive, network connectivity, and audio output, generally do not affect visual display. A functioning hard drive ensures the operating system loads, but it does not control video output. Network connectivity affects online access, and audio output manages sound signals; neither has an impact on whether the screen displays visuals.
Proper diagnosis of display issues allows the technician to address the problem efficiently without unnecessary replacement of other components. Ensuring secure connections, correct backlight operation, and appropriate brightness levels restores visibility and maintains the usability of the system. Routine checks of display hardware and software settings are essential for optimal functionality, allowing users to interact with the device effectively and maintain productivity.
Question 99
A user reports that their desktop cannot print to a network printer, but the printer works for other devices. Which of the following is the first step?
( A ) Check the workstation’s network configuration and printer driver
( B ) Replace the printer
( C ) Replace the monitor
( D ) Upgrade the graphics card
Answer: A
Explanation:
When a printer functions correctly on multiple devices but fails to work on a specific workstation, the root cause is usually related to that workstation’s network configuration or printer driver setup. The first step is to check the network settings to ensure the computer is properly connected to the same network as the printer. This includes verifying the IP address, subnet mask, default gateway, and DNS settings. Any misconfiguration in these parameters can prevent the workstation from communicating with the printer, even though the network is otherwise functional.
In addition to network settings, the printer driver must be correctly installed and up to date. The technician should confirm that the installed driver matches the printer model and operating system. Outdated or incompatible drivers can cause print jobs to fail, generate errors, or prevent the printer from appearing in the device list. Reinstalling the driver or downloading the latest version from the manufacturer’s website often resolves such issues. It is also important to check that the correct printer is selected as the default device and that print queue settings are functioning properly.
Other potential fixes, such as replacing the printer, monitor, or graphics card, are unrelated to the problem. The printer works with other devices, indicating it is fully functional, and display hardware or graphics capabilities do not affect printing. Focusing on local configuration prevents unnecessary hardware changes, reduces costs, and saves time.
By carefully examining network settings and printer driver status, the technician can restore printing functionality efficiently. Proper configuration ensures the workstation can communicate reliably with the printer, maintaining productivity and minimizing user frustration. Network troubleshooting and driver management are essential skills for maintaining consistent printer performance across multiple devices in an office or home environment. Ensuring each workstation is correctly configured allows for seamless operation within a shared network setup and prevents recurring connectivity issues.
Question 100
A user reports that their smartphone frequently restarts without warning. Which of the following should the technician check first?
( A ) Recently installed apps or system updates
( B ) Screen brightness settings
( C ) Bluetooth device connections
( D ) Wallpaper settings
Answer: A
Explanation:
Frequent unexpected restarts on a smartphone are most often caused by software-related issues rather than hardware failures. One of the primary causes can be recently installed applications that are incompatible with the operating system or with other apps on the device. These conflicts can lead to instability, triggering the system to restart unexpectedly. The technician should review all recently added apps, check for pending updates, and determine whether any particular app correlates with the timing of the restarts. Removing or updating problematic applications frequently resolves these issues without further intervention.
System updates can also contribute to unexpected restarts. Incomplete, corrupted, or improperly installed firmware updates may create conflicts within the operating system, resulting in repeated system reboots. The technician should verify that the device is running the latest stable software version, and if necessary, reinstall or roll back updates to a prior stable version. Ensuring that system updates are fully applied and compatible with the device model is essential to maintain stability and prevent recurring crashes.
Other factors, such as screen brightness settings, Bluetooth connections, or wallpaper customizations, generally do not cause system-wide restarts. Adjustments to display brightness, temporary Bluetooth interference, or aesthetic settings like wallpaper have little impact on the core operating system processes responsible for stability. While these may affect battery life or user experience, they are unlikely to trigger sudden reboots.
Addressing software-related causes first allows the technician to efficiently restore device functionality without unnecessary hardware inspections or replacements. Managing app compatibility, performing system updates correctly, and identifying problematic software ensures reliable operation, prolongs device lifespan, and maintains productivity. Taking precautions such as backing up important data before troubleshooting provides additional security, enabling recovery if more extensive software repairs or resets are required. A systematic approach focused on software diagnostics ensures effective resolution of unexpected restarts.
