Dell POWEREDGE 4300, Installation And Troubleshooting Manual

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Diagnostic Video Tests A-1
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The Video test group of the system diagnostics consists of the following eight tests,
each of which verifies a particular video function or group of functions:
‡
Video Memory Test — Checks the integrity of characters generated from data in
the video memory.
‡
Video Hardware Test — Checks the functions of the cursor register and the hor-
izontal and vertical retrace bit registers.
‡
Text Mode Character Test — Checks the video subsystem’s ability to present
text mode data.
‡
Text Mode Color Test — Checks the video subsystem’s ability to present color in
text modes.
‡
Text Mode Pages Test — Checks the video subsystem’s ability to map and
present all available video text pages on the monitor screen, one page at a time.
‡
Graphics Mode Test — Checks the video subsystem’s ability to present graphics
mode data and colors.
‡
Color Palettes Test — Checks the video subsystem’s ability to display all avail-
able colors.
‡
Solid Colors Test — Checks the video subsystem’s ability to show screens full
of solid colors. Allows you to check for missing color subpixels.
All of these tests, except the Video Memory Test and the Video Hardware Test , are
interactive. These interactive tests display images on the monitor screen and require
the user to respond as follows:
1. Examine a displayed image for correctness.
2. If an image is correct, type
\
.
3. If an image is incorrect, type
Q
.
The following sections describe each of the tests in the Video test group.