It started happening again today - and I'm pretty positive it's not heat related as it's rather cool in my room at the moment, and the unit doesn't feel hot to touch. My DP keeps losing it's display and I can hear the mute realy click every time it does. It goes off-on-off-on-off quite randomly, and sometimes quite rapidly. The display disappears, but the power light is still on (and bright, so it's not going into standby). None of the other devices on the bus turn off, and I don't lose my picture - just the sound. If I'm displaying the menu it stays, so it's just showing the pass-through. It doesn't respond to any commands from the remote when it's off. I then switched off with the switch, waited a minute, then powered it up again. Nothing for about 3 minutes, then I get the self-test message, then bursts into life. Then off-on-off-on-off-on Any ideas? I've got a whole bunch of people coming down for a film weekend in a couple weeks - help!!!