Symptom charts, Startup – Apple Mac PowerBook 550c User Manual
Page 29
Troubleshooting
Symptom Charts/Startup - 2
Symptom Charts
Startup
RAM failure occurs
(eight-tone error
chord sounds after
startup chord)
1 Reseat RAM expansion card and check connection.
2 Replace RAM expansion card.
3 Replace daughterboard.
4 Replace motherboard.
Hardware failure
occurs (four-tone
error chord sounds
after startup chord)
1 Disconnect hard drive cable and restart computer. If startup
sequence is normal, reconnect cable and retest.
2 Replace hard drive.
3 Disconnect floppy drive cable and restart computer. If
startup sequence is normal, reconnect cable and retest.
4 Replace floppy drive.
5 Replace motherboard.
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