Not responding to controls
My receiver has worked beautifully for the last several years. However, I had a recent issue where it would no longer accept control inputs either via the controls on the front panel or from the remote. It was still accepting and outputting sound though. The only way I could even get the thing to turn off was to unplug it. I thought maybe it just got too hot, but it wasn't any warmer than usual. I imagine it would probably turn itself off if that was the case anyway. After letting it sit for several hours unplugged just in case it needed some sort of reset, I plugged it back in and it defaults to the VCR/DVR channel. I can't change the input, increase/decrease the volume, or turn it off. I pushed all the buttons, nothing works. It's still not responding to any of the buttons on the control panel or the remote.
I'm guessing one of the boards has gone bad, but wanted to check here before I take the thing 200+ miles for service (it's the closest authorized repair center and happens to be on my way to the in-laws) and pay $50 only to find out they probably can't fix it. Anybody got any ideas on what might be wrong with it or where I can get parts for it myself if it's a simple fix?
Thanks in advance!