TV won't turn on?

I bought a 32" Sanyo TV from Walmart just one year ago and the other day it would not turn on. The screen is completely black....no picture....no sound at all. The night before, the TV was fine....no indication there was a problem and the next morning when I turned on the TV, it was black screen with no sound. The cable company sent someone out to check the cable and that's not the problem. So NOW what is the problem. It's only one year old. A TV should last longer than that. I have a 13" Toshiba TV I've had since 1990 and it's still running and it has beautiful color. Twenty years later, it's just like new. One year later with this stupid Sanyo and it's toast!!! Sanyo needs to do something about this since I'm not the only one with this problem. Any suggestions????? I will NEVER buy another Sanyo. I just can't get over the fact my TV is only one year old and I can't even watch it! I work hard for my money and this was a luxury to me. What a waste of money....Thanks Sanyo for NOTHING!!!