Try a power cord pull and reboot. And be sure the TV is powered up before the receiver so it can find it. Be sure the HDMI connector is all the way in. Try wiggling it up and down. It seems the cooling is not adequate on the 622 and the connector can unsolder itself from the board if there is a lot of cable weight on it. They used to tell us that it was a known problem and just to use the component out. But now with 1080P only on HDMI, I think they are going to have to start replacing boxes.
I'm sorry, I should have stated what I had already done. I've done the power cord reboot at least 6 times, I've also wiggled the cable and also removed and reinserted it numerous times. The left side of the 622 is very warm, and I have plenty of clearance around it for heat disipation. Is there a way to check for fan operation other than removing the cover and turning it on? I use a Monster Cable M-1000 HDMI Cable, which is very stiff.
Thanks for the help.
Any other recommendations?