Getting a loud buzzing noise in the rear of my Mitsubishi wd-52327. The sound is coming from the fan area. Originally i thought the fan was bad but after review the fan seems to be working fine. When trying to turn the TV on it makes the noise and doesn't work. After a short period of time the green ON light goes red and shuts down. Any clues?

I have just experienced the same issue with my mitsubishi WD62525 as well...thought it may have been a lamp issue as well....replaced the lamp with the spare and still have the same symptoms...(only difference is that my timer light just continues to blink green and never turns red???) I cleaned out the rear filter...was not really that dusty so not sure what else it may be????

Is there a large amount of heat coming from the back? I had a similar issue w/ my tv, and it ended up being the lamp - but a trick that i was able to use to extend the life a little longer was to power the tv off, grab a can of compressed air (can get it anywhere, usually just a buck or two) and blast it right into the vents in the back, cleaning out the dust that accumulates from normal usage. If it is, in fact, the lamp, it's not a tough fix - email me if you have any other questions! Good luck!