With that past color wheel replacement experience in mind, I’ve changed out the color wheel, the DMD board due to a broken, heat fused socket 5, chip, and, of course, the lamp. I’ve bench checked both fans for noise, and they are quiet running both in and out of the set. There do not appear to be any obstructions in the housing that the color wheel could be brushing against – As you know it is a self-contained unit.
The first CW replacement this go round arrived in a badly damage box, but I used it anyway. Same issue; so I returned the CW. This time the color wheel arrived without apparent damage of any sort. It was well packed and both cartons (inner and outer) were blemish free indicating no hard knocks by our friends at the USPS (unlike last time). It looked perfect to me in all respects except for the gasket, which was torn. I used the old CW gasket.
The various boards, chips, wires plugs, and paraphernalia went in without any problem at all. Every aspect of disassembly and reassembly was done as though I were disarming an explosive device. There were no issues of any sort. I wore latex gloves throughout the operation.
Turned the TV set on... Normal picture; BUT the grinding noise is still present. I only know of 3 moving parts in the set - two fans and the color wheel. What are your collective thoughts on this dilemma?