Dell POWEREDGE 4300, Installation And Troubleshooting Manual

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5-16 Dell PowerEdge 4300 Systems Installation and Troubleshooting Guide
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The computer periodically locks up, especially at different places and times in dif-
ferent programs.
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The computer halts in the middle of performing calculations or complex mathe-
matical operations.
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The subtests in the Video test group verify the proper operation of the video control-
ler and the video control circuitry installed in the computer. These subtests check for
the correct operation of the readable registers in the video circuitry and the controller.
They write, read, and verify data patterns in the cursor registers of the controller. The
Video test group also tests all the video memory and provides additional subtests to
test the color features of a color monitor.
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The eight subtests in the Video test group and the video functions they test follow:
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Video Memory Test
Checks the read/write capability of video memory in various video modes.
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Video Hardware Test
Checks the cursor registers and the horizontal and vertical retrace bit registers in
the video controller.
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Text Mode Character Test
Checks the video subsystem’s ability to present data in text modes.
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Text Mode Color Test
Checks the video subsystem’s ability to present color in text modes.
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Text Mode Pages Test
Checks the video subsystem’s ability to map and present all available video pages
on the screen, one page at a time.
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Graphics Mode Test
Checks the video subsystem’s ability to present data and color in graphics
modes.
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Color Palettes Test
Checks the video subsystem’s ability to display all of the available colors.
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Solid Colors Test
Checks the video subsystem’s ability to show screens full of solid colors. Allows
you to check for missing color subpixels.