VM230XVT model works great for about 10 - 20 minutes and then picture goes to hazy colored lines and snow. but still have audio. Is it worth fixing??

SOURCE: thin horizontal line

IT SOUNDS LIKE A VERT. COLLAPSE. IT MIGHT BAD CONNECTIONS IN THER VERT. DEFLECTION.

SOURCE: toshiba theaterview lines don't line up

Convergence IC blown stk392-???

SOURCE: vertical colored lines no picture.

if the tv is less than a year old , call 1-800-SAMSUNG for warranty repair, the lcd panel is bad

SOURCE: FOGGY-HAZY PICTURE

The contrast setting should always be more than the brightness setting, it's purely common sense to have the black levels dark and the white levels light. I advise your brightness to be 40, and your contrast to be set to 60.

You shouldn't alter the hue, as most manufacturers would have spent significant time balancing this anyway, so set this to 50 and leave it alone.

The saturation shouldn't be altered too much, the best bet is to set this to 55 and let it be. Also, the colour temperature shouldn't be changed atall, so set this to the default setting and leave it alone.

As for the sharpness setting, this should definitely be set quite low. I advise setting the sharpness to 40, and the reason for this is most people assume that the higher the sharpness the better quality and detail, and they're completely wrong.

If you do what I said, you should end up with a crisp, smooth and colourful picture.

SOURCE: Rolling horizontal (colored) lines instead of picture; audio OK

This problems it pretty easy to fix.Just require take the tv apart.Resolders all the holes in the video board that connected to a long CRT tube neck.Should cost $50 -$75 more than that u are being cheated.