Look around for any video processing feature and turn it off.
This happens on any input (hdmi, composite, etc) when viewing certain images. The screen darkens and the plasma starts to jitter/become fuzzy. If anyone knows of a fix, please let me know ASAP. This started happening about when my warranty ran out. Would replacing a board fix it or is there an easier way?
It's a Panasonic Viera TC-P60S30.