Apple Macintosh LC 575 Specifications download pdf (Page 29)

Troubleshooting Symptom Charts/Video

(Continued)

- 8

Video

(Continued)

Screen jitters or

flashes

1 Refer to “First Checklist” in this chapter. Move electrical

devices (other monitors, scanners, etc.) away from monitor.

Temporarily shut off all fluorescent lights in area.

2 Move unit to another room or building and check if symptom

persists.

3 Replace analog board.

Out of focus 1 Perform focus adjustment. Refer to “Focus” in Adjustments

chapter. Note that misconvergence can also produce an out-

of-focus symptom.

2 Check for proper screen luminance. If luminance is off,

perform cutoff and white balance adjustments. Refer to

“Video” in Adjustments chapter.

3 Replace analog board.

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Apple Macintosh LC 575 Specifications Page 29