I have the ARC cable set up between the TV and my home theater. It has worked for over two years. There were occasional glitches easily cured by unplugging the receiver, TV, and all cables. Now ARC has stopped working completely - no sound no control. I've replaced the HDMI cable, made sure ARC and Simplink were turned on on both the TV and receiver, unplugged everything for a few hours, and did a soft reset. No luck. Is there anything I can do to fix this? Is there a way to do a hard reset, perhaps?