I have ~170 hours on my H7531D now, but last night it did a pretty strange thing. Right after the BCS football game was over suddenly the picture went away, the fans turned off, and it started beeping with the power button flashing between red and blue. I tried the power button from the remote and it wouldn't respond. I hit the power button on the projectorand it turned off, and then I waited for a few minutes and turned it on and it seemed like it started up just fine.
According to the manual, flashing blue on the power button means "Lamp Retry", but it doesn't say at all what "lamp retry" means.
Anybody else had anything like this happen? I'm trying to figure out if I should contact Acer support now, or wait to see if it happens again.
Other than this hiccup, I am loving this projector.