The fans on my Toshiba DLP frequently makes a loud humming noise, as if something is vibrating that should not be. I am not sure if it is the bulb fan, or the ballast fan, but the noise continues after I turn the TV off until it cools down. So, I am assuming it is the bulb fan. The noise does not happen all the time. There are times when I turn the TV on and hear the normal sound of the fan instead of the loud buzzing. There will be times when I do not hear the loud fan noise initially but then will it hear it later after the TV has been on a while. And there are times when I hear the loud buzzing sound of the fan right away.and is there an easy solution to this? I would like to replace the fan myself ! Years ago, I repaired TVs.

SOURCE: Toshiba DLP fan noise (52hmx95)

UUUUggggghhhh I have a 1 year old Toshiba 50" DLP rear projection and it had fan noise. It also had a wierd dark spot on the screen that really wasn't on the screen itself. I was taken to a service center and held captive for 2-3 weeks and returned with a new light engine. I thought great! 3 weeks to a month later and bordering on expiration of warranty it starts to make a low screeching sound like a small motor in need of lubricant. The picture jumps all over and resembles a 256 color PC Monitor. The service center comes and picks it up and holds it captive for another 2.5 weeks and says they cannot duplicate the problem. I had even sent them a quicktime movie of it in action.
They drop it off and an hour goes by and off she goes again. Now the longer I leave it on the worse it gets and shuts itself down and sometimes blinks the "light engine" code. Spoke with Toshiba and they are escalating it and should hear back in 3 days... OMG. Kinda off on a tangent, but they do make strange noises.
Did Toshiba get out of the DLP game???