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HELP! No red color in my TV picture.


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5 replies to this topic

#1 of 6 OFFLINE   Blaine Skerry

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Posted January 21 2005 - 03:23 PM

I turned on my 30" Toshiba TV tonight and there is no red color in the picture. The TV is just 18 months old and, of course, out of warranty. Anyone care to speculate on what the problem may be? I tried turning the TV off and on several times and I also unplugged it for an hour and when I turned it on there was still no red in the picture.

#2 of 6 OFFLINE   ChrisMatson

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Posted January 21 2005 - 03:32 PM

Does it happen with all video sources? You may have part of a component video cable unplugged. Check all of the connections.

#3 of 6 OFFLINE   Blaine Skerry

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Posted January 21 2005 - 03:37 PM

It happens with basic cable through my antenna connection and also with composite and component inputs. It's got to be the picture tube. Any other speculation?

#4 of 6 OFFLINE   Allan Jayne

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Posted January 22 2005 - 02:02 AM

It could also be circuits associated with the picture tube, or even just the need to unplug and replug the picture tube socket (to clean any oxidized connections). All of these also need an experienced person to get involved.

Some picture tubes have three distinct filaments in the neck for red, green, and blue electron guns respectively. If one of the three is seen to be dark, the picture tube is definitely gone.

This one is simple, easy but would have to be a long lucky shot -- someone tampered with the service menu and turned down the red gain.

Video hints:
http://members.aol.c...ynejr/video.htm
.

#5 of 6 OFFLINE   ChrisWiggles

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Posted January 22 2005 - 05:12 AM

Indeed, it could be a simple contact problem in there, or something failed for the red gun. Might be a simple fix, but I would use a tech because of the dangers involved if you don't know what you're doing.

#6 of 6 OFFLINE   Blaine Skerry

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Posted January 23 2005 - 02:10 PM

Thanks to all who replied but the problem seems to have sorted itself out for the time being. If it happens again, a qualified technician would seem to be the route to take. Thanks again.