SOURCE: mitsubishi 52inch
With the 52" DLP , there are 3 fans, 2 of which you can see. the 3rd is similar to what you would see on a CPU. To get to this fan you must pull out the back of the set, at the bottom you will see a metallic channel that runs over to the filter on the side of the tv. un do the screws holding it down and you will find the mini fan. this may be the fan that is beginning to fail, as well as you will find that the heat sink is probably covered with ****, you will want to vaccum that stuff off to get the max heat exchange. To replace that mini fan, you can either go to allied or digikey to get a comparable fan with possible more CFM than the stock or go through some where you can a OEM replacement fan.
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