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Question

Difficulty: MediumMotherboard, RAM, CPU, and Power Issues

A user reports that a business workstation turns on, but the monitor remains blank and no initial POST beep is emitted. The system power LED illuminates solid and internal chassis fans run continuously at full speed. A diagnostic POST card attached to the motherboard displays a code corresponding to an early memory initialization failure. Which of the following actions should the technician take FIRST?

  1. Reseat the existing memory modules and test the system using a single known-good RAM module in individual slots.Answer
  2. B
    Reinstall the operating system on the primary hard drive to clear corrupt boot files.
  3. C
    Replace the desktop motherboard memory modules with standard SO-DIMM modules.
  4. D
    Replace the power supply with a higher wattage model before conducting hardware testing.

Answer

Reseat the existing memory modules and test the system using a single known-good RAM module in individual slots.
Reseating the memory modules and isolating them by testing one stick at a time is the standard, logical first diagnostic step when a system fails POST during memory initialization. This process confirms whether bad contacts, incorrect seating, or a specific faulty module is preventing startup.

Step-by-Step Solution

1
Analyze the reported symptoms and diagnostic code
System fans spin and power LEDs illuminate, but no display or POST beep occurs. The diagnostic POST card confirms an early memory initialization failure.
Identifying that the failure occurs during POST memory checks isolates the issue to RAM modules, RAM slots, or the motherboard memory controller prior to storage boot loading.
2
Apply lowest-cost and least invasive hardware troubleshooting step
Power down the system, remove and reseat the RAM modules, or test a single known-good stick across different slots.
Poor physical seating or a single degraded memory module commonly causes POST memory initialization failures.

Key Concept

Memory Isolation and POST Troubleshooting Sequence
Estimated Time:1m 15s
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Topics

Motherboard, RAM, CPU, and Power Issues

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