4.0 Display
If the screen is rolling, replace the display assembly. If that does not
correct the problem, replace the system board.
If the screen is not rolling, do the following to run the display
self-test:
1. Power-off the system.
2. Unplug the display signal cable.
3. Power-on the system. (For an external display, also turn on the
display.)
4. Turn the brightness and contrast controls clockwise to their maximum
setting.
5. Check for the following conditions:
The screen should be white or light gray with a black margin. On
an external display, the black margin for the 8513, 8514 and 8515
displays should measure 2-20 mm (0.08-0.79 in.) wide on one or
both sides.
The contrast and brightness controls should vary the screen
intensity.
If both of these conditions are not present, replace the display
assembly.
If both conditions are present, replace the system board. If that
does not correct the problem, replace the display assembly.
IBM PS/2 Model 25 SX HMR
Display
¦ Copyright IBM Corp. 1992
4.0 - 1
