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Troubleshooting Symptom Charts/Video - 11
Raster tilted or
shifted
1 Refer to “First Checklist” in Troubleshooting chapter. Move
metal objects away from monitor.
2 Perform appropriate geometric adjustments. Refer to
“Geometry” in Adjustments chapter.
3 Replace analog/video board assembly.
Raster distorted
(barrel-shaped,
corners not square,
stretched or
compressed at top of
display, or sides not
perpendicular)
1 Refer to “First Checklist” in Troubleshooting chapter.
2 Perform appropriate geometric adjustments. Refer to
“Geometry” in Adjustments chapter.
3 Install monitor-adjustment cable and use on-screen video
adjustment controls to eliminate distortion. Based on video
tolerances, some distortion is allowed and setting need not
be perfect. Contact Apple Technical Support if you’re unsure
about tolerance level.
4 Replace analog/video board assembly.