I have the same problem with mine, reboots randomly when changing channels or just watching a channel. I had changed the lamp not too long ago and the last 1 blew when rebooting like this, very concerned it's gonna blow the new lamp like this soon! Have any of you guys found out what's going wrong???
i never came across this when i had mine, got rid of it about 6 months ago but it was an epic tv for me. Are all three of you using the same source for your picture? ie virgin media, sky, or the built in tuner. Maybe theres some relevance there.i had virgin, with no probs.
i used to remove the back now and then on mine and get rid of all the **** and dust, from fans etc etc. worth a try. good luck