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| Troubleshooting |
| Symptom Charts/Miscellaneous - 28 | |
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| shows “Sad | 1 | Replace RAM SIMMs on logic board. |
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Screen | |||||
Macintosh” icon and | 2 | Replace logic board. Retain customer’s SIMMs. | |||
black vertical lines; |
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screeching sound |
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Rattling sound at | Press or fold Apple External Video cable to prevent it from | ||||
startup in system | contacting fan blades. | ||||
with Apple External |
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Video Connector |
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Headphone jack does | 1 | Verify that headphone jack is seated properly. | |||
not operate correctly | 2 | Replace front panel control board. | |||
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| 3 | Replace chassis/wiring harness. | |
