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Video problems
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Video problems
The system is running but there is no display
The text on the display 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 power is applied to the monitor, the green
power LED should illuminate.
The monitor’s data cable
is not connected.
Make sure the monitor’s data cable is
connected to the video controller on the back
of the system.
The connector or cable is
damaged.
Check the connector and cable for bent or
damaged pins.
The monitor is defective. Connect a working monitor to the computer.
The monitor’s brightness
and contrast controls are
turned down.
Adjust the brightness and contrast knobs to the
center position.
The video card is not
seated correctly.
Open the system and reseat the video card.
The video card is not
compatible with the
system.
Make sure the card is compatible with your
system. Try a different PCI video card.
Important Some systems may have a built-in video adapter, so there
may not be a video adapter to remove and replace.
Probable Cause Solution
The monitor’s brightness
and contrast controls are
turned down.
Adjust the brightness and contrast knobs until
the text becomes clear.
Sunlight is glaring off the
display.
Position the monitor away from the sun or
window.
The CRT may be old. Replace the monitor.