Is there a way to take a HR20-100 out of RF mode manually? I have an old HR20-100 that I am trying to hook up. When I had it connected before (about a year ago), it was in RF mode, but I only have an IR remote with me. I originally thought "no problem, just use the control buttons on the front of the box to navigate setup" but the down arrow button is not working and that essentially keeps me from doing anything. Is there any way to "reset" the box to factory condition (i.e., so that it defaults back to IR mode)? Thanks in advance!