Apple performa 630 series Servicehandbuch

 

 Troubleshooting

Symptom Charts/Error Chords - 2

 

Symptom Charts

 

Eight-tone error 

chord sounds during 

startup

1 Reseat SIMMs

2 Replace SIMMs. Refer to Hardware/Memory manual.

3 Replace logic board. Retain customer’s SIMMs.

4 Perform SIMM verification on replacement logic board.

Four-tone error 

chord sounds during 

startup

1 Disconnect hard drive power cable and reboot system. If 

startup sequence is normal, run “Macintosh Hard Disk Test” 

and replace hard drive if necessary.

2 Disconnect floppy drive cable and reboot system. If startup 

sequence is normal, replace floppy drive.

3 Replace logic board. Retain customer’s SIMMs.