Apple powermac 8500 series Servicehandbuch

 

 Troubleshooting

Symptom Charts/System 

 

 (Continued)

 

 - 7

 

Clicking, chirping, 

or thumping

1 Remove all PCI cards and test the unit. If problem does not 

occur with cards removed, begin replacing them one at a 

time to determine which card is causing the problem. 

Replace problem card with known-good card.

2 Remove hard drive. If problem no longer occurs, replace 

hard drive with a known-good drive.

3 Replace power supply.

4 Replace processor card.

5 Replace logic board. Retain customer's DIMMs.

6 Replace floppy drive cable.

7 Replace floppy drive.