Dell Inspiron 3500 Reference And Troubleshooting Manual page 135

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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.
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The Video Hardware Test verifies the operation of the cursor registers and the hori-
zontal 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.
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The Text Mode Character Test consists of a group of subtests that display printable
characters and character attributes. The subtests check character quality and the abil-
ity of the display or monitor to show the characters correctly. A prompt at the bottom
of each screen asks you to decide whether the display is satisfactory and to respond
by typing y or n.
If you respond affirmatively to each subtest, the Text Mode Character Test passes. A
negative response to any subtest causes the test to fail.
The following subsections describe the subtests of the Text Mode Character Test in
the order in which they appear.
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The 80-column x 25-line character attributes subtest displays four lines of text that
demonstrate normal-intensity video, reverse video, intensified video, and blinking
video.
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The 80-column x 25-line character set subtest displays all 256 characters in the Amer-
ican Standard Code for Information Interchange (ASCII) character set in 80-column by
25-line text mode. Figure B-1 shows part of the 80-column x 25-line character set sub-
test screen.
B-2 Dell Inspiron 3500 Portable Computer Reference and Troubleshooting Guide