Apple powermac 8500 series Servicehandbuch

 

 Troubleshooting

Symptom Charts/Video 

 

 (Continued)

 

 - 13

 

Screen is black, no 

boot tone and drive 

does not operate, but 

fan is running and 

LED is lit

1 Reset Cuda chip. (Refer to The Cuda Chip in Basics for 

instructions.)

2 Reset logic board. (Refer to Resetting the Logic Board in 

Basics for instructions.)

3 Remove all DRAM DIMMs and try replacing them one at a 

time to test. Replace any bad DIMMs.

4 Replace processor card.

5 Replace logic board. Retain customer's DIMMs.

6 Replace power supply.