I have a 622 that was running a Sony HD and a RCA CRT in another room. I have replaced the Sony with a Mitsubishi HD and moved the sony to replace the RCA. I transferred the coax from the RCA input to Sony antenna input and then the cable input. I have cylced through the Sony inputs and do not get a signal. The Mitsubishi is working fine. Should this be working or am I missing something? I am aware that TV2 is not HD. I will address that issue later. Thanks for any suggestions.