Display Self-Test - IBM PS/2 70 Hardware Maintenance Service

7.0 Display Self-Test

1. Power-off the system unit and display.
2. Disconnect the display signal cable.
3. Power-on the display.
4. Turn the contrast to its maximum position.
5. Turn the brightness control to the center detent position.
The screen should be white with a black margin, as described below (some
shading may occur near the edges).
display. If the display passes the test, replace the display adapter or
the system board.
8503, 8512, 8513, 8514:
sides.
8506: 2-35 mm (0.08-1.38 in.) wide on the top, or bottom, or both.
8507, 8508, 8515:
or both.
8604: 2-20 mm (0.08-0.79 in.) wide, on all four sides.
IBM PS/2 Model 70 HMS
Display Self-Test
If the screen differs, replace the
2-20 mm (0.08-0.79 in.) wide on one or both
2-20 mm (0.08-0.79 in.) wide on the top, or bottom,
¦ Copyright IBM Corp. 1991
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