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| Troubleshooting Monitors | Image Quality
Problems ]
One of the primary colors is missing from all displayed images, or one of the primary
colors flickers in intensity intermittently
Explanation: The displayed image either permanently or temporarily shows the loss
of one of the primary colors, making the whole screen look like it is being viewed through
a greenish, bluish or purplish tint. Usually this means that one of red, green, or blue is
missing from the image regardless of what is being displayed. The problem may appear
intermittently, flickering in and out, or it may be present all the time.
Diagnosis: This problem is normally caused by a break in the connection of one of
the three color signals between the video card and the monitor. It is very common,
particularly with older monitors.
Recommendation:
- Double-check the connection from the PC to the monitor. Make sure that the cable is
securely attached on both ends, and that it is not kinked, stretched or damaged. Try
changing the angle that the cable is sitting at.
- Try replacing the monitor cable (if possible, some monitors have the cable integrated
into the monitor) and see if the problem goes away.
- Take the monitor in for repair. Many times, these
problems are caused by repeated thermal stress causing solder joints to crack or come
loose where the cable attaches to the circuit board inside the monitor. This type of
problem can usually be repaired economically.
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