My Sears Craftsman garage door opener will not work with the remotes, or the wireless key pad. This all happened this past weekend. The GDO direct wired remote works fine. I have tried to reset the remotes many times and have unplugged them. Should I assume its a bad circuit board? Sears wanted $70 for a diagnosis, but given the cost of parts and labor I might as well just buy a new one. Any other suggestions?