I have a Panasonic VT30 and an Onkyo TX-NR609. Everything was working great, and then I moved the whole setup to a new tv stand. Now everything works great except the ARC.
My xbox and PS3 are connected through the receiver and work fine. The TV still detects and communicates with the receiver, too. The TV automatically turns off the internal speakers and disables all tv related audio settings. Adjusting the volume on the TV remote adjusts the volume on the receiver, but the audio just doesn't work.
As a work-around, I have installed an optical cable and switched over the receiver to use that, which works, but I would really rather just use the ARC that was already working in another location. This makes me wonder if it is possible that there is a problem with the data line using the ARC? Or does anyone else have any thoughts on what could cause this?