Having an intermittant issue with my 722 and a new issue (potential). Occasionally, I will try to go to 9439 (CNBC) and get an error message about clicking the up or down arrow to change channels. At the same time, cannot get the weather channel or the travel channel either, probably others. This happens in the 9xxx and the 2xx channels. I have to reboot. Then yesterday (I copied the issue from another post, so I'm not the only one apparently): 2) one day I turned TV on and there was no picture and no sound. All the guides and menus were working, but no transmission. A reboot holding the power button eventually fixed the problem. It happened a second time 2 days ago. Fixed by reboot again. So.............. I'm curious more on the first issue since that has been ongoing. Now I fear for the 2nd issue that my box will not work one day and I'll be hosed waiting for a new one. Thoughts?