Apple 578 Benutzerhandbuch

 

 Troubleshooting

Symptom Charts/Miscellaneous

 

 (Continued)

 

 - 17

 

Screen shows “Sad 

Macintosh” icon and 

black vertical lines; 

screeching sound

1 Replace RAM SIMMs on logic board. 

2 Replace logic board. Retain customer’s SIMMs.

Headphone jack does 

not operate correctly

1 Verify that headphone jack is seated properly.

2 Replace chassis harness assembly. 

Speaker jacks do not 

operate 

1 Verify that speaker jacks are seated properly.

2 Replace chassis harness assembly.