TroubleshootingSymptom Charts/Startup - 4

Symptom Charts

Startup

RAM failure occurs

1

Reseat RAM expansion card and check connection.

(eight-tone error

2

Replace RAM expansion card.

chord sounds after

3

Replace daughterboard.

startup chord)

4

Replace motherboard.

Hardware failure

1

Disconnect hard drive cable and restart computer. If startup

occurs (four-tone

2

sequence is normal, reconnect cable and retest.

error chord sounds

Replace hard drive.

after startup chord)

3

Disconnect floppy drive cable and restart computer. If

 

4

startup sequence is normal, reconnect cable and retest.

 

Replace floppy drive.

 

5

Replace motherboard.

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Apple 550C manual Symptom Charts, Startup

550C specifications

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