Whats the problem and how much to fix it?

Magnavox Smartseries TV wants to turn off while you watch it,
this is repeated throughout the time when its being used,
and during this time you have to continuley keep turning it back on. What is the problem and how much will it cost to fix it?

TV.JustAnswer.com

Sounds like it could be a lot of different things. A blown capacitor, a faulty power cable, some sort of infrared interference, or it could be overheating. Most of those are pretty cheap to repair (although you can get easily scammed on the price). I think you should give that justanswer.com site a try that tracey suggested.