Our Main TV Doesn't Work

It seems that every summer things break in our house. This summer is no different. Our tv in our bedroom died and our main computer is dying and now the main tv is not working. Last night we were watching Big Brother and the picture goes. We could still hear the sounds but no picture. We are not sure what is going on because we can hook up the WII system and we can see the picture and we can hook up the dvd player and we can get a picture. Hopefully we can get that to work because if we can't that will be on big expense.