I have replaced the lamp and fan on my tv within the last 2 weeks.
after repalcing the fan the tv seemed to be fine, but the next day after the fan repalcement I have a humming noise. It seems to get louder the longer the tv is on. could this be the color wheel. the tv is a samsung dlp model hlp5063wx/xaa
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If its a DLP with a high pitched or even fan like sound it is the color wheel--Mitsubishi does not sell them as a part---you would have to replace the entire light engine (expensive and may not be available any more on a older set) .
I had the same problem with a 5065. I purchased and installed a new color wheel and that solved the noise problem. The color wheel has a bearing that gets "dry", and when it fails it does sound like a fan bearing.
I have the same thing, mine is the cooling fan for the lamp. If the sound continues for a short time after you turn off the TV then this is the most likely cause as the cooling fan will continue to run for a short time to cool off the bulb. I have looked into replacing mine, the part runs around $50 but I can't say yet how easy it is to replace yet.
i constantly hear complaints about fan noise in dlptvs
if you sit in front of your computer you will hear the same noise
even in the next room
there is no solution to the fan noise problem
this product has a huge cage fan and a second and third three inch fans in it.... more than the samsung product
it can be noticeable if the tv is on hard surfaces
ie wood floors ,inthe corner, glass top etc
the vents on the back of the tv allow for proper cooling of the lamp at shutoff so it doesnt shatter the tube
its kinda like annealing glass
its designed to extend the life of the lamp ....
which im sure youve priced
call toshiba and tell them your lamp is bad right now and get a new one for an emergency ( warranty if you can do it )
they are also improved
this product is known to have short bulb life
sometimes the zinging noise you hear is indicative of a bad color wheel in the light engine which would require replacement
( not cheap)
toshiba will not piece out the color wheel assembly individually