Question about Optoma RD65 65" Rear Projection HDTV

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Small bluish, black triangle at far right corner

A small, bluish black upside down triangle has appeared at the top right of my Optoma RD65H TV. It starts at the top with the opposite side about 2 inches with the hypotenuse running almost all the way down to the bottom and connecting with the bottom right corner. Any idea what this is or how to fix it? Thx, Mike PS: I've tried multiple cables and sources, it is definitely on the TV.

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This is the same problem as other posts have mentioned about the right side of the screen having a bluish-balck stripe down the side of the screen. Here's what's happening. There's a small light tunnel which has 4 very small mirrors located just behind the color wheel. The lamp shines light through the color wheel as it turns and the light goes through this small tunnel and is then relected off several mirrors before it is projected through the lens and onto the screen. Optoma apparently did not use a very good heat resistant expoxy glue when they assembled these mirrors and over time the mirrors drop down causing a shadow effect on the screen. It can be repaired without paying some repair shop a small fortune. Previous posts have a solution from another contributer whihc includes photos. I had to repair mine and it's worked fine since I used a decent expoxy to hold the mirrors.

Posted on Sep 20, 2008

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