Hi all, I have an '08 Mits 65735 that has about 6700 hours on the original bulb. I am 99.9% sure the picture is not as bright as it used to be, I notice this especially on a bright screen. The edges of the picture are noticeably darker than the center. I am hoping I can fix this with a bulb replacement. Can anyone tell me if this is a standard symptom of a weak bulb? Also, when I replace the bulb is there anywhere in the back of the TV that I should try and clean, places that dust can build up that would be easy for me to clean up. Whenever I replace the bulb I'd like to do any other maintenance that is not too difficult to do if anyone has any suggestions. Thanks for any help and I'm sorry if this question has been asked before I searched for awhile and didn't find what I was looking for.