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Repairing old LCD monitor

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rogerdugans

Linux challenged Senior, not that it stops me...
Joined
Dec 28, 2001
Location
Corner of No and Where
I have an old 15" lcd monitor that quit a year or so ago.
Kept it to see if I could revive it, and I have had partial success:
It will come on, run games and such for a while and do fine; then it cuts out again.
I still get the light indicating video signal, but it is dark: no light, no video and I get no monitor menu options either.

If I wait a while it will come back on, but it repeats this behavior.

I have tried messing with the cables-
the video cable itself was modded to go into a custom build a while back and I had to rebuild a new one.
I have also tried it both with the emi shield (back of screen inside the monitor) on and off and this makes no difference.

The only things I can think of are either overheating (seems unlikely) or some sort of cold cathode problem. The screen gets its light from cold cathodes, and when it cuts out there is NOTHING displayed.

Anyone ever mess with one of these and/or find a resolution for a similar problem?