Join Date: Feb 2011
Location: Summerlin - Las Vegas
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Ok, my 2 year old HD20 all of a sudden started displaying distorted color images like many of the videos on youtube. I was also getting incorrect display resolutions and timings. I eliminated my HDMI, my receiver, and connections in general. After googling the subject, I found references here and on a few other places with the majority of opinions stating it to be related to dust on the color wheel. I concur fully...at least at this time some three hours after cleaning the projector and color wheel. Just a few notes for doing the procedure....after removing the 3 screws in the bottom of the projector, there are 2 screws to remove the lamp cover - I had a sticker covering one of the screw holes so I just poked through the sticker and found the 2nd screw. I pried the top cover off with a small flat head screw driver gently along the front, back and sides till it was free noting to only pull up slightly as there is a ribbon connector from top piece to the main body of the projector. What I discovered which I didn't see stated anywhere else is that if you pull back on the black piece where the ribbon inserts, it flips up and lets the ribbon slide free and reversely when you put ribbon back you flip the black piece back on the ribbon till it clicks thus holding the ribbon in place. I used residue free canned air to blow out the projector. Both the large and smaller fans were pretty dusty. For both I held the fan blade with one finger while applying a strong stream of air rotating one blade at a time till all blades were clean. As for the color wheel, I placed on finger on top to the wheel to keep it from spinning and lightly applied some air which dislodged a little over half the dust, turning the wheel slowly till completely rotated and repeated for both sides. Instead of using a Qtip and alcohol which I was leery about, I cut a piece of microfiber cloth about 1/2 an inch wide and about 1 inch long, I then folded it between a pair of tweezers and then place the cloth held by the tweezers so that the folded cloth covered both sides of the color wheel. I then turned the wheel slowly one complete revolution and viola the color wheel was completely clean of dust. Since microfiber is not supposed to scratch and I didn't like the idea of applying a possible harmful solution, I found this to work quite nicely. I also note as several others have that the "filter" located in the back corner was dislodged with the tape they used to hold it in place....REALLY?....I took some super glue and glued it in place as well as applying a thin strip of duck tape. As I say, after putting it all back together and ceiling mounting it back into place, I was experiencing no issues some 3 hours later. If anything develops, I will post an update, otherwise mission accomplished.