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Fault diagnosis

Answer a few questions to narrow down the cause. The steps follow the order technicians actually use: rule things out from the outside in, from cheap to expensive.

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What to do

The machine is not booting, even though it powers on

  1. Listen for beeps at power-on — beep codes tell RAM faults from board faults
  2. Remove the RAM, clean the contacts and reseat it firmly — vibration works RAM loose over time
  3. With more than one module, test each module in each slot
  4. Clear the CMOS using the button or Clear CMOS jumper on the machine
  5. Remove all drives and expansion cards, leaving only CPU + 1 RAM module, then try

Tried everything and still stuck?

Describe the symptoms and what you have tried — an engineer will call back to help.

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Symptom: The machine is not booting, even though it powers on

We only use this number to answer your request.

Before opening the machine. Disconnect power, wait for capacitors to discharge, and photograph the current wiring. If the machine is under warranty, call us first — opening it yourself may void the warranty.