rca 27 inch tv has scrambled picture

[guest]

Here's the deal. I received this tv from a friend who said it was less than a year old. He told me of its problems so I wasn't surprised.
The TV works fine when it has been sitting for a while, or overnight. After being on for 1 to 3 hours the picture turns black and white. If you turn the TV off and then back on again the picture is scrambled, but the sound is still on. The TV then needs to set for an hour or so and then its like nothing happened - the picture is back and works fine. This happens all the time.
This is an RCA 27 inch TV.
Model #27R410T
Chassis #ITC008FAM
Any input would be appreciated, and I am not a tech.
Thanx!!

[guest]

I'm taking the tv to be repaired. I hope it doesn't cost much.

[Guest]

Here's your problem, it's an RCA. Fix that, and you'll be set.

I have the same tv, but mine went through a power outtage, and the picture is really dark when I turned it back on, and I can't adjust the color. I'm trying to a find a parental control unloack code cause I'm thinking its that. Everything works fine, it's just dark and I can't fix it.