Filter
Top Products
Troubleshooting Symptom Charts/Video - 16
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.
Raster not centered 1 Adjust horizontal or vertical shift control. Refer to
Adjustments chapter.
2 Refer to “First Checklist” in Troubleshooting chapter.
3 Install monitor-adjustment cable and use on-screen video
adjustment controls to center raster. If centering range is
insufficient, change the setting of switch SW701
(three-position switch).