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Question: I bought the yamaha rx-v863 in january of 2010 from bestbuy.

After about a month, it started shutting off while we were watching tv. I went through the manual and trouble shot it, but nothing worked. I tried taking it back to best buy, but I used cash and lost my reciept. Yamaha told me without a reciept, they can't honor their 2 year warranty. I had a comp. tech look at it, and they said it had a defective board, and would cost $600 to repair. I paid $500 for it brand new. Do I have any other options, or am I screwed?! Thanks