Apple LC 550 Dokumentacja Strona 22

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Troubleshooting Symptom Charts/Video
(Continued)
- 4
Video
(Continued)
Out of convergence
(color bleeds from
text or lines)
1 Perform convergence adjustment. Refer to “Convergence” in
Adjustments chapter.
2 Replace analog board.
3 Replace CRT.
Black screen spots
(burnt phosphors)
Replace CRT.
Screen jitters or
flashes
1 Verify that adjacent computer equipment is properly
grounded. Move electrical devices away from monitor.
Temporarily shut off all fluorescent lights in area.
2 Check that all ground cables are secure.
3 Disconnect internal floppy drive, CD-ROM drive, and hard
drive.
4 Replace analog board.
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