Red color disappeared from the monitor: advice Please

  • Thread starter Thread starter Fayyaz Hameed
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Fayyaz Hameed

I have got an Athlon 2400 system running windows 98SE. Suddely the red color
has disappeard from the monitor. There is only green and blue left. I have
tried to remove and reinstall my video card (TNT) but no effect.

Is it the problem with the monitor, video card or something else. The
monitor is LG Flatron 795Plus. Please help.
 
I had the same problem, the short version is:
one of the pins had shorted. All I had to do to
fix mine was straighten out the pins.

al
 
!Allen Lasting said:
I had the same problem, the short version is:
one of the pins had shorted. All I had to do to
fix mine was straighten out the pins.
Click to expand...

....or broken wire in the cable
 
Fayyaz said:
I have got an Athlon 2400 system running windows 98SE. Suddely the red color
has disappeard from the monitor. There is only green and blue left. I have
tried to remove and reinstall my video card (TNT) but no effect.

Is it the problem with the monitor, video card or something else. The
monitor is LG Flatron 795Plus. Please help.
Click to expand...

Least likely is the video card. Most likely is the monitor, or a
loose/broken wire in the monitor cable or connector.

Try wiggling the cable.

But since you said it just suddenly went out, and I presume has not come
back, even momentarily, I'd tend to think the red drive transistor/FET in
the monitor died.
 
Fayyaz Hameed said:
There is only green and blue left. I have tried to remove and
reinstall my video card (TNT) but no effect.

Is it the problem with the monitor, video card or something
else. The monitor is LG Flatron 795Plus. Please help.
Click to expand...

If a different video card doesn't help, then it's definitely the
monitor, and if wiggling the video cable at both ends makes no
difference, try the whacking test, where you simultaneously slap the
left and right sides of the monitor. If the red then reappears, even
briefly, then there could be a bad internal connection, possibly
including a bad solder joint. Otherwise there may be a problem on the
small circuit board that plugs into the end of the picture tube (bad
solder, cracked resistor, shorted driver transistor, which is probably
inside a chip for all 3 primary colors) or, worst case, a short in the
picture tube. Tube shorts can often be fixed with a picture tube
rejuevenator or by isolating the shorted heater. Unfortunately a
repair will likely cost almost as much as a new monitor, but if you
have it done take it to a TV repair shop or monitor specialist, never
to a computer shop, where they rarely know anything about monitors.
 
It sounds like the red circuitry in your monitor has died. Try using a
known working monitor and see if that fixes it.
 
coaxial controlling red has busted in the cable.. is my guess
if the cable is removable that's an easy check if not then the 'kink'
and 'stretch' the cable in various places..........
 
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