I purchased a TCP60ST50 about 2 months ago. We have an issue where it occasionally changes to "static":
This has happened with my Comcast HD-DVR on HDMI1, HDMI2, HDMI3, as well as after I swapped my Comcast HD-DVR box with another TV (same model HD-DVR from Comcast, however). I haven't yet seen it with the Panasonic blue-ray player, but we don't watch a lot of blue-ray movies. What I haven't tried: swapping the HDMI cable, asking Comcast to provide me a different model of HD-DVR box, other input types beyond HDMI.
The only solution when it "flips to static" is to power the TV off and on. The interesting thing is that if I hit MENU, it appears fine (in front of the static). The next time it happens, I am going to try to change to the blue-ray to see if it is isolated to the input.
The other thought I had is that it could possibly be a cable or power issue. I am swapping the HDMI cable now, and will be putting a UPS unit in front of the TV to condition the power as soon as I can purchase another UPS.
Any thoughts? Is this a glitch or possibly a standard protection "feature" for under-powered or HDMI/input issues?