Chances are, if it's an older set, componants have changed value through use over time, which also includes the picture tubes and associated driver circuits. The way to compensate for this color drift is through adjustments. Either turn the red down a little, or turn the blue and/or green UP. Be carefull though as there are potentially dangerous voltages in and around the circuit boards and picture tubes.
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Main system control section circuit fault. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. http://electronicshelponline.blogspot.com/ Pull up older posts there.
this was adjusted by the fine tune on the selector It is the picture not being held in place by being out of tune Same as if the picture goes sideways On the real old units there were 2 knobs to make these adjustments.
I had AWFUL customer service. (Sherry is DREADFUL her # is 1-877-543-8325 she is in"executive services". Ask to speak to her directly...if you would like ZERO help.)
They WILL NOT extend the warranty, even though they know there is a defect with this AND other models. Zenith name on the front...LG guts in the inside. Ours turns on, screen black and then clicks three times and then turns back off.
I surmise that if it was made in 1995 it is a CRT rear projection TV. It would have three CRT (picture) tubes, and these are replaceable (but still not cheap or easy to find). The CRTs are probably not the problem.
Are the red lines running across the screen at a slant upward from left to right? If so, you're looking at red retrace lines (as the beam sweeps back up the screen after drawing a frame). Retrace lines should not be visible. If you get the picture working again, you may want to check whether a color balance (CRT screen and drive control) adjustment is needed (colors should not be excessively reddish in either dark or light areas).
What happens if you connect a DVD or VHS player to the direct audio/video inputs instead of the cable? If you get sound and picture, then the cable problem may have zapped the tuner. There are several alternatives: replace the tuner (the hard part would be finding one), find a tuner repair shop, or get a radio amateur with UHF receiver construction experience to take a look at it.
The set is probably repairable, but without looking inside with an oscilloscope or finding a record of this failure mode in this particular model (whichever one it is), I can't do more than speculate on the cause.
This just happened to my Z50 yesterday...10 days after it came back from the repair shop! The first repair was for the "popping" problem where the tv makes a loud pop and the screen goes black. This took 6 weeks to get fixed. For this new problem the repair center is getting hold of LG to find out what to do. I am also calling them because I see this is a major problem that people have been experiencing out of warranty. The first customer service rep told me I was out of luck but I am not accepting that answer. Good luck, we'll both need it.