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Loud buzz/whirring noise, need help diag and fix

\015 The noise began about a year go (it's 2012, bought in early 2008) and has become noticeably louder at greater increments and lengths. This week the noise went from a moderate hum or whir to the volume of a circular saw in the next room. I am unsure what the issue is and how to fix it. I understand it could be one of three things: lamp tunnel, color wheel, cooling fan / ballast. \012\012The issue here is that all three are seperate moderately expensive parts and I really don't want to buy all three for the potential of a singular root cause. The nearest "Samsung approved" tech is 70 miles from me and would charge as though I bought all three parts, plus some. \012\012Ideas, suggestions, solutions would be appreciated beyond words.\015

Answers :

If Samsung the color wheel (part number BP96-01579A) is suspect number 1.

Wheel turns at over 8,000 rpm and commonly fails= High pitched sound or fan like sound---and when it fails (shatters) you will have a grinding sound and set should shut down.

There is an easy way to know---with owner manual remove the lamp unit (its a cartridge) and look where the lamp faces--if pieces of the wheel are missing etc the wheel is gone.

Most of the wheels are customer replaceable if you are handy. You Tube even has video instructions for most models for this repair--most sources that sell the part also provide instructions--for a first time person doing this it takes around a hour.

see attached photo of typical color wheel.

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