Tv Repair

[Forkinhades]

hi peeps, I recently bought a 42 inch lcd tv, (December 2007), which is turning itself after about 5 mins, seems something is getting hot, and its a saftey device inside. Now i cannot find the receipt or the warranty, so what options do i have?? I bought it from a big store on Sukhumvit.

Now it might be just as easy to get it fixed locally, so does anybody know of a good repair shop??