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90 Troubleshooting
Video problems
The computer is running but the screen is blank.
The image on the screen is dim or difficult to read.
Probable cause Solution
The monitor is not turned on Make sure the monitor is plugged in and turned
on. If the monitor is turned on, the green power
LED should illuminate.
The monitor’s data cable is
not connected
Make sure the monitor data cable is connected
to the video controller on the back of the
computer.
The connector or cable is
damaged
Check the connector and cable for bent or
damaged pins.
The monitor brightness and
contrast controls are turned
down
Adjust the brightness and contrast knobs to the
center position.
System board memory is not
seated properly - indicated by
a beep
Open the computer and reseat the system
board memory.
The monitor is defective Connect a working monitor to the computer.
Probable cause Solution
The monitor brightness and
contrast controls are turned
down
Adjust the brightness and contrast knobs until
the text becomes clear.
Light is glaring off the display Position the monitor away from the sun or other
light source.
The monitor may be old Replace the monitor.