My TV won't work! help!

My tv won't work on just a few random channels! its a blue screen, and it was working earlier till it randomly blancked out whilst I was watching. and I thought it would have fixed itself by now, but it hasn't. and ussually this wouldn't be a huge deal. but it just had to be tonight! I'm missing the first new episodes of 4 great shows, that haven't been new since the writers strike. well one had its new episode last week but all the rest start again tonight.
and I really wanted to see them. not that I'm a saddo and I only watch tv, but I am an addict for shows that I really really like.
I'm missing:

My Name is Earl (!!!!!!!!)

30 Rock (!!!!!!!)

The Office (!!!!!!!!!!!!!!!!!!!)

Scrubs (!!!!!!!!!!!!!!!!!!)

and tonight just had to be the night my tv decided to do this. on justy a few channels, but it had to be on channel 2 aswell.

sorry for my tv addiction. but I'm frustrated. is there anyway to fix my tv? its just I'm bored and I wanted to watch, and now I've missed a week of four tv shows.