IBM Aptiva 2134, Hardware Maintenance Service

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Display Self Test
Be sure the monitor has been turned on for approximately 5 minutes before
you start the Display Self Test.
Note: If you are testing a digital power-on LED monitor with a row of LEDs
under the access door at the front of the monitor, ignore Step 4a and do
Step 4b only. For monitors with an on/off LED only, do only Step 4a.
Run the test as follows:
1. Power-off the system unit and monitor.
2. Disconnect the monitor signal cable from the system unit.
3. Power-on the monitor. Check to see that the power-on LED is lit.
Note: G40 and G50 series monitors have a dual color power-on LED.
When powered on and not plugged into the system, the power-on LED
will show yellow. When the monitor is plugged into the system, the
power-on LED will show green.
G70 and higher series monitors display a vertical color bar test pattern
when powered on and not plugged into the system. When plugged into
the system, the color bar pattern disappears and the screen is blank.
4. Turn the brightness and contrast controls to their maximum positions.
a. If the monitor has an on/off LED only, the following symptoms
indicate the monitor is still good:
The monitor screen should get lighter (it should not stay
completely black). You may want to check the monitor in a
dark or dimly lit room.
The monitor screen should show a power-off discharge (a flash
of light) when turned off.
Note: If you can see the flash of light but not the lighter screen,
you may want to perform Step 4 again in a dark or dimly lit room.
b. If the monitor has a row of LEDs next to the control buttons, the
following symptom indicates the monitor is still good:
The row of LEDs should repeatedly flash (or blink) in sequence
from left to right.
Diagnostic Aids
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