Dell Inspiron 7000 Reference And Troubleshooting Manual page 130

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.
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.
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.
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.
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 7000 Reference and Troubleshooting Guide