[JohnCT]

It almost sounds like someone took this apart and got the polarizer sheets installed wrong in front of the LCD module.

It could also be a circuit problem. Most electronics in those days used "fish" caps: small surface mount electrolytics that go bad. We used to change several hundred a week when we did camcorders.

If the TV seems to improve with run time, that could be it. Also, putting it in a warm spot (like near a radiator) and warming it 20 deg above room temp may also improve it. Most thermal issues are cap related.

EDIT: is there also a "contrast" control in addition to the bright? Viewing angle changes dramatically with contrast and brightness with LCD screens even when working as designed.

John