I have an 811, 510 and 311. Both my 510 and 311 have picture this evening, but my 811 does not. I can pull up the guide but there is no picture or sound from any channels I turn to. Did they recently release a new software that this is a know problem? Any other thoughts that may cause this or advice to fix it? I can power off and on with no problem, everything else seems to work fine except for no picture or sound. I've had my 811 for over a year now and this is the first real problem I've had with it.