I have tried everything. I even added a fan to make sure that the unit was not running too hot but still freezing. I am on Spike HD right now and it is constantly freezing. I agree with everything that Pimp Twzt has mentioned above this posting. As I am typing this my TV has now got SCRAMBLE CHANNEL.
Spike HD never did come back on after it went to SCRAMBLE CHANNEL but other HD channels seem to be alright. I really wonder what the answer is?