Hey guys great site , I started having problems with my 2 year old 508 48hrs ago. Out of the blue it is now cycling off and on, coming back on and searching for signal, finding it and running for about 5mins then shutting off again. It will do it all night. I can shut it off and it will still lose complete power and have to resreach for a signal. I thought at first it was over heating and the fan burnt out. I never shut it off and have it set to go stand by, But I replace the fan and even left the cover off with a house fan blowing on it and it still dose it. I even have it plugged into the wall to bypass the surge protector and it still happens. Anybody out there with any help?