I have the tc p50st50 and am experiencing the power off, click, power on issue as well. The red light at the bottom never turns off. It's more of annoyance than anything, but considering the set is only a couple months old (I got it when Sears had its sale in March, I believe?), I will be contacting Panasonic about this. It has happened 2 or 3 times now. Sometimes I am watching tv (Time Warner cable box) and one time I was playing the xbox. At the time, I just chalked it up to hdmi handshake issue but after seeing previous comments on this thread, it may be something more. Anyway, like I said, Panasonic will be getting a call from me and I'll try to update this thread on what I find out.