2 Diagnosing Computer Hardware Problems Free Online FlashCards

What should guide the start of a hardware diagnosis?

Begin with the observed symptom rather than guessing which part to replace; symptoms suggest possible faults but do not prove a component has failed.

What defines a no-power fault, and what should be checked first?

No power means there are no lights, fan movement, sounds, or other signs of activity. Check the outlet and external power connections first.

What basic checks help diagnose a blank screen?

Check monitor power, input selection, cable, and brightness. Testing another monitor or cable can help narrow the cause.

What problems can faulty RAM cause?

Memory problems can cause failure to POST, freezes, unexpected restarts, or recurring errors. These symptoms point to possibilities, not proof of a failed module.

How can you isolate a peripheral that causes startup failure or freezes?

Disconnect nonessential devices, restart with only essentials connected, then reconnect devices one at a time. If the problem returns with one device, test its cable, port, and device if possible.

What are common overheating clues, and one way to improve airflow?

Loud fans, reduced performance during demanding tasks, or shutdowns after heating up can indicate overheating. Keep vents clear and use a laptop on a firm surface.

When are preboot diagnostics useful, and what should follow a pass?

Preboot diagnostics can examine hardware without relying on Windows. If they pass but the problem occurs only after the operating system loads, investigate software, drivers, and settings next.

What safety precautions apply before internal hardware work?

Shut down and unplug the computer before connecting or disconnecting internal parts. Never open a power-supply unit or sealed laptop battery; stop using a laptop with a swollen battery.

Why change only one thing at a time during troubleshooting?

Change one thing at a time and retest. This helps identify which change affects the problem.

What is a no-POST fault?

No POST means the computer receives power but does not complete its initial hardware checks. Record any beep or diagnostic-light pattern and consult the model’s manual.

What does “No bootable device” indicate—and not prove?

No boot means POST completes but the operating system does not load. A “No bootable device” message suggests a boot-device or startup problem, but does not prove the drive has failed.

What is stronger evidence of a memory fault than symptoms alone?

Run the computer maker’s preboot diagnostics, if available, and record any error code. A failed test is stronger evidence than symptoms alone.