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Question

Difficulty: MediumMotherboard, RAM, CPU, and Power Issues

A user reports that an office desktop PC fails to complete the boot process after being relocated to a different desk. When the power button is pressed, the system power LED illuminates and internal cooling fans spin normally, but no video output appears on the monitor and the system emits a continuous series of repeating short beeps. Which of the following components is most likely unseated or failing?

  1. System RAM moduleAnswer
  2. B
    Operating system boot drive
  3. C
    CPU thermal throttling sensor
  4. D
    Graphics card display driver

Answer

System RAM module
The correct answer identifies the system RAM module. During POST, if the motherboard BIOS/UEFI cannot detect or properly initialize memory, it halts the boot process before initializing the display adapter and emits a designated audible beep code sequence. Relocating equipment frequently causes slightly loose RAM modules to shift out of proper pin alignment.

Step-by-Step Solution

1
Analyze the symptoms reported during system startup.
The system powers on and fans operate, but video output is absent and audible POST beep codes are produced.
Audible beep codes are generated by the motherboard firmware during the Power-On Self-Test (POST) to report critical hardware initialization failures.
2
Interpret the specific POST error code pattern.
A continuous or repeating short beep pattern indicates a critical failure in detecting or initializing memory (RAM).
Physical movement during relocation often dislodges loosely latched RAM modules from their slots.
3
Determine the appropriate diagnostic and corrective action.
Reseat or replace the system RAM module.
Ensuring proper physical contact in memory slots resolves POST memory identification errors.

Key Concept

Power-On Self-Test (POST) Diagnostics and Memory (RAM) Troubleshooting
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Topics

Motherboard, RAM, CPU, and Power Issues

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