Download Apple Power Mac G4 Service manual

Transcript
Troubleshooting
Screen jitter
Symptom Charts/ Video - 5 2
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Verify there are no environmental factors causing jitter.
Check all cable connections.
Make sure that the video card driver and firmware are
updated to the most recent versions.
Test with a known-good monitor. Replace the monitor, if
necessary. Refer to the appropriate monitor manual to
troubleshoot a defective monitor.
Reseat the video card.
Replace the video card.
Replace the logic board.