Apple performa 400 series Servicehandbuch
Troubleshooting
Symptom Charts/Error Chords - 2
Symptom Charts
Error Chords
Eight-tone error
chord sounds during
startup
1 Replace SIMMs.
2 Replace logic board. Retain customer’s SIMMs.
3 Perform SIMM verification on replacement logic board.
Four-tone error
chord sounds during
startup
1 Disconnect hard drive power cable and hard drive data 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.