Apple powermac g3 blue.white Manuale Di Servizio

 

 Troubleshooting

Symptom Charts/System - 31

 

System is completely 

dead

1 Check LEDS DS7 and DS8 on the logic board. In a working 

unit, these LEDs should be in sync with each other: both on or 

both off. If one LED is on and the other is off, there is a 

problem.

2 Verify the power outlet is good. Try a known-good power 

cord. 

3 Make sure the voltage switch on the back of the power supply 

is set to the correct voltage.

4 Check the power supply by following the procedures in 

“Power Supply Verification” outlined earlier in this 

chapter.

5 Disconnect the keyboard and power-on the system via the 

reset button on the front of the computer. If the unit powers 

on, replace the USB keyboard. If not, go to next step.

6 Reset the CUDA chip and try again. If the problem persists, 

reset the logic board. (See “The CUDA Chip” and “Resetting