Problem with my 6412 (Comcast Chicago):
I decided that it would be a good idea to check the status screen on my box, so I turned it off, hit 'select' and went into the status screen. Browsed around, checked a few things out, no big deal right?
Wellllllllllll, when i exited the screen and went back to an "off" box, and I turned it on again, no picture. It would display the guide info, change channels, go into the guide, etc. ONLY when i played a saved program from the dvr section and then exited it would the picture come on.
I unplugged it for 30 seconds, plugged it back in, and that seemed to fix it b/c I was able to turn it on and get a picture...but now it is back to its old tricks, and I have not gone into any status screens.