Del: Thanks for your reply. Since I wrote you the note I called Nohoelectronics and spoke to a tech. He walked me thru a series of things and said that particular model has had a flaw in the main board that they have seen numerous times. You send them the original board as long as it has not been altered, they test it, repair it and return it. $109 and 1 week. Before I send it off I have already requested information on warranties. I will keep you informed and thanks for your help.