I currently own a 3-year old 5.1 Kenwood VR-509. This unit works well, but I am having intermittent problems with response to the remote control commands, especially the basic ones that turn on and off the receiver and control its volume. This means that the receiver will sometimes normally respond to commands, then 5 minutes later it will no longer respond only to start responding again a little later on, without any pattern or predictability. By substituting remote control units, I have established that the problem lies with the receiver, not with the remote control unit. I was wondering if anybody out there ever experienced this type of problem and if there might be a relatively simple (read inexpensive) solution to it. Thanks for your help.