I have a 56 inch samsung model no. HLR5656W. Bought it brand new two years ago and everything was fine until a month ago when it started shutting off on its own and not coming back on for up to four hours later. Then it would come back on and run fine for a few days. Well five days ago it did the same thing again for the fourth time and I haven't been able to turn it on since. I've tried plugging it in in different outlets that I know are working and no response. Its like its not receiving power any longer. Is there any thing I should look for or try on my own before possibly spending a fortune to get it repaired?