Apple performa 630 series Servicehandbuch

 

 Troubleshooting

Symptom Charts/Video

 

 (Continued)

 

 - 7

 

Screen is completely 

dark, fan is not 

running and LED is 

not lit

1 Check all external power connections.

2 Computer powers on exclusively through softpower on 

keyboard. Verify that power-on connections of keyboard are 

functioning by testing with known-good keyboard.

3 Reseat logic board. 

4 Unplug 5.4 battery, wait 20 seconds, plug in battery, and 

restart computer.

5 Verify that monitor has power. 

6 Remove expansion card, if present.

7 Remove peripherals.

8 Replace power supply.

9 Replace logic board. Retain customer’s SIMMs.