A question about LCD TV's

[crazyjr]

I know this is not a tech forum for this, but similar questions have been asked before. Last year my sister bought a sanyo LCD 48" TV, It has been a great TV but today it did something wierd. According to my bro in law, he turned it on and it showed only half a picture, It wasn't overheating, because it had only been running an hour that morning for kids cartoons. When it was turned on later it was OK, no sign of anything wrong, they continued to run it just to see if it would do it again, but nothing. To anyone with LCD experience, What caused this problem? And, Is it a sign of a failing product? Hate to think, after a year, this product is failing and in need of repair