Specifications

Power Mac G5 Troubleshooting - 11
Symptom Charts
Symptom Charts
How to Use the Symptom Charts
The Symptom Charts included in this chapter will help you diagnose specific symptoms
related to the product. Because cures are listed on the charts in the order of most likely
solution, try the cures in the order presented. Verify whether or not the product continues
to exhibit the symptom. If the symptom persists, try the next cure.
Note: If a cure instructs you to replace a module, reinstall the original module before you
proceed to the next cure.
Important: The only way to shut off power completely to the computer and display is to
disconnect their power plugs from the power source. Make sure the power cords to the
computer and display are within easy reach.
Failures
No power (no LED, no fans, no boot tone, no video)
1. Verify power outlet is good
2. Replace power cord
3. Check power supply cables
4. Check power rails for correct voltage
5. Replace power supply
6. Check front panel board cable
7. Replace front panel board cable
8. Replace front panel board
9. Replace power button
10. Replace logic board
No LED (fans on, boot tone, video)
1. Replace front panel board
2. Replace power button