Just wanted to mention this about this model that everyone seems to be having trouble with. I read all the threads and did all the checks with no luck. My set was acting a little different. It would come on and work good until you turned set off then when you tried to turn on again it would blink 5 times and then it would not come on until you unplug set for few minutes and then it would come on again. All voltages checked ok except backlight and dim when I tried to turn on again. after I tried everything I read on threads and was about to give up I decided to try factory re-set for Samsung tv and it worked and it comes on every time and has been every since. I hope this info. will help someone down the road. I know it sounds too simple but heck I always try simple things last. Hope this helps.