I have a 61 inch samsung dlp tv (will have had it for two years at the end of april) and it keeps shutting on and off by itself. About 4 months ago the lamp went out. We purchased a new lamp and installed ourselves and it has been working fine. All of a sudden today like every 5 minutes the screen goes black still with sound then the tv goes out and comes back on. I don't think its the lamp again, but not sure since we brought an off brand. Any suggestions as to what it could be and about how much it will cost to fix. Stupid us didn't purchase the extended warranty.