AT&T PC 6300 - Page 287

DIAGNOSTICS
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Specific tests can be run by entering the option number, followed
by the ENTER key, or all tests may be run by entering the value
"10", followed by the ENTER key.
Note: Tests 3 and 4 must be run with the contrast control
set to approximately midrange. This is necessary to
distinguish between lines that are blinking from low light
to high light.
A detailed description with specific screens can be found in the
"MAINTENANCE" Section of Chapter 5. The following is a brief
description of the test performed by each of the MENU options.
1 - MEMORY TEST: No error should occur during this test. If
any error does occur, reject the DEB.
Note: The "Diagnostic Utility" will write data on the
default drive. MFD default drives must have a formatted
(write unprotected) diskette installed.
2 - TRANSPARENT MODE: This test displays a framed full
screen with three lines. If any additional random character and/or
blocks are displayed, reject the board.
3 - TEXT WITH 400 LINE GRAPHICS: This test produces a
screen with 8 lines, each exercising a different video feature. (The
monitor contrast control must be set to midrange.) Each line
describes its appearance. If the description and the actual
appearance do not agree, reject the board.
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