Apple M8760LL Service Guide - Page 149

Distorted sound from speakers

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9. Check speaker cable. Verify left and right cable connections. 10. Check with headphones or external speaker, if audio is heard, replace speaker assembly. 11. Replace sound board flex cable. 12. Replace sound board. 13. Replace the logic board. Distorted sound from speakers 1. Verify sound is correct with external speakers/headphones. If sound is correct, check speaker wire and connections. 2. In Sound system preference pane, check balance. 3. Compare same sound with two different units to make sure that sound is actually distorted. 4. Check speaker wire. If damaged, replace speaker assembly. 5. Replace sound board. 6. Replace sound board flex cable. 7. Replace logic board. Hardware Symptom Charts PowerBook G4 (15-inch FW800) Troubleshooting - 31

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PowerBook G4 (15-inch FW800) Troubleshooting -
31
Hardware Symptom Charts
9.
Check speaker cable. Verify left and right cable connections.
10.
Check with headphones or external speaker, if audio is heard, replace speaker
assembly.
11.
Replace sound board flex cable.
12.
Replace sound board.
13.
Replace the logic board.
Distorted sound from speakers
1.
Verify sound is correct with external speakers/headphones. If sound is correct, check
speaker wire and connections.
2.
In Sound system preference pane, check balance.
3.
Compare same sound with two different units to make sure that sound is actually
distorted.
4.
Check speaker wire. If damaged, replace speaker assembly.
5.
Replace sound board.
6.
Replace sound board flex cable.
7.
Replace logic board.