I have the Panny LT712E, the next upgrade from the one you have. I recently replaced the bulb. I did not have any clicking noises, but had the picture getting soft for some reason and I had some colorations appear. So I took the projector in to the dealer for a service and lamp replacement. It is back as good as new.

Sorry I could not help more.

------ M80, VP150, QS8 Surr, QS8 Back Surr Sunfire Amp -M80, Denon 3805 -all else, SVS 20-39 PC+