Hi, I can't tell any difference when I change between high and low for the lamp power in the Options menu. Fan changes speed but I can't detect any brightness change at all. I assume this is a fault in my projector but I thought I would ask before going to all the hassle of getting Panasonic to investigate the problem. I used to have it set to low power and low fan speed and the lamp died after 300 hours so I am wondering whether it has got "stuck" on high lamp power and so then overheated. Thoughts?