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 5a and do
Step 5b only. For monitors with an on/off LED only, do only Step 5a.
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.
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 5 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.
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