Please help troubleshoot HK AVR7200 problem.....

Hello to everyone and Happy New Year. I was sitting on the couch watching Dick Clark on tv when my receiver seemed to turn itself off. The only sound was a small click just like I hit the power button on the remote. I tried to power the unit back up with no success. I looked for a reset button on the receiver but found nothing. I bought this new 2 years ago from an online retailer. This was their top of the line AVR at the time and weighs 60lbs. Any ideas of what could have happened. It has worked perfectly. I tried unplugging it and letting it sit for a little while. It wasn't hot to the touch when this happened. I am baffled. Any ideas of what happened and how to fix it? Thanks for your help.

Nick