Diagnostic video tests: dell, Latitude, Cpi a-series system user's guide – Dell Latitude CPi A User Manual
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Diagnostic Video Tests: Dell
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Latitude
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CPi A-Series System
User's Guide
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Overview
The Video test group of the Dell Diagnostics consists of the following eight tests, each of which verifies a
particular video function or group of functions on your built-in display or on an external monitor:
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 horizontal 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 display or monitor, 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 available colors
Solid Colors Test — Checks the video subsystem's ability to show screens full of solid colors and to
display all pixels
All of these tests, except the Video Memory Test and the Video Hardware Test, are interactive. These
interactive tests display images on the display or monitor and require you to respond with the following steps:
1.
Examine a displayed image for correctness.
2.
If an image is correct, type y.
3.
If an image is incorrect, type n.
The following sections describe each of the tests in the Video test group.
Video Memory Test
The Video Memory Test verifies the integrity of the video memory on the system board. When a test is
complete, a message indicates whether the video memory has passed or failed the test. This test does not
require any interaction on your part.
Video Hardware Test
The Video Hardware Test verifies the operation of the cursor registers and the horizontal and vertical retrace
bit registers. When a test is complete, a message indicates whether these registers have passed or failed the
test. This test does not require any interaction on your part.