IBM Aptiva 2142 - Manual (Page 109)

Monitor
First, review the “Display Self Test” on page 3-12, then follow step 001.
001
– Power-off the system unit and monitor.
– Remove all adapter cards.
– Make sure the monitor I/O signal cable is properly connected to the
system unit and monitor.
– Make sure the power cords are properly connected to the system unit and
monitor, and that the line voltage is correct. See “Power Supply” on
page 2-34.
– Make sure the monitor contrast and brightness controls are not adjusted
too low.
– Power-on the monitor, and wait 20 seconds.
– Power-on the system unit.
Note: Because monitor models might differ, review the Display Self Test
before attempting to answer the following questions. The test has
changed from previous levels. If the monitor was not sold together
with the system unit, you might need to refer to the service
information provided with the monitor.
– If you are not familiar with the self-test pattern produced by the Display
Self Test, refer to step 4 of “Display Self Test” on page 3-12 for a
description of the self-test pattern.
Note: Do not run the Display Self Test. Do not unplug the monitor I/O
signal cable from the system unit.
DOES THE DISPLAY SELF-TEST PATTERN APPEAR ON THE SCREEN?
Yes No
002
Go to Step 006 on page 2-54.
003
Unplug the monitor I/O signal cable from the system unit.
DID THE DISPLAY SELF-TEST PATTERN REMAIN ON THE SCREEN
Yes No
004
(Step 004 continues)
Check Procedures 2-53