Apple powermac 8500 series Servicehandbuch

 

 Troubleshooting

Symptom Charts/Video 

 

 (Continued)

 

 - 14

 

Boot tone is present 

and screen lights up, 

but nothing is 

displayed on screen

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 Replace monitor cable.

4 Test with known-good monitor. Replace monitor if 

necessary. Refer to appropriate monitor manual to 

troubleshoot defective monitor.

5 Replace processor card.

6 Replace logic board. Retain customer's DIMMs.