Apple powermac g3 blue.white Manuales De Servicio

 

 Troubleshooting

Symptom Charts/Video and Sound - 44

 

Screen is black, there 

is no boot tone, and 

drive does not 

operate, but fan is 

running and LED is lit

1 Check video cable/card connections. If using a VGA to 

Macintosh adapter refer to “VGA-to-Macintosh Adapter” 

earlier in this chapter.

2 Check jumper block configuration at J25. Make sure jumper 

block is correct color for processor type installed (see 

“Jumper Location J25” earlier in this chapter for more 

information). Also make sure the metal jumper pins are in 

the correct position in the block and the block is installed in 

the correct direction.

3 Reset Cuda chip. (Refer to “The Cuda Chip” in this chapter 

for instructions.)

4 Reset logic board. (Refer to “Resetting the Logic Board” in 

this chapter for instructions.)

5 Reseat the video card.

6 Reseat the SDRAM DIMMs.

7 Reseat processor module.

8 Remove all SDRAM DIMMs and try replacing them one at a 

time to test. Replace any bad DIMMs.