From white spots to strange fingerprint smudges on my DLP - AVS Forum
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post #1 of 4 Old 08-18-2012, 04:51 AM - Thread Starter
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I had the dreaded white spot problem (just a few spots though) on my Mitsubishi 73 inch DLP TV, so I called the repair place and they replaced the DMD chip. That immediately fixed the problem, and I was really happy until I watched a show tonight and it faded to black at the end, and I could see what looked like fingerprint smudges inside the screen. The best way I can describe it is magnified fingerprints. So I paused the DVR on a black screen and checked it out. It's definitely not on the outside of the screen. Is this something the repair guy could have done when he was replacing the chip, or has it always been there and I just didn't notice it because I was distracted by a few white dots?

If it's something he did, can I fix it myself? I'm pretty good with that stuff if I actually know what the problem is!

Thanks!
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post #2 of 4 Old 08-18-2012, 08:13 AM
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Call him back. He obviously handled the chip and left his print on the DMD's window.





Notice at timestamp 4:06 of this repair video that the DMD chip is being handled wearing gloves.







and at timestamp 6:21 of this repair video that the technician shows the DMD chip to the viewer and says "make sure you don't touch this part, right here".




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post #3 of 4 Old 08-18-2012, 04:24 PM - Thread Starter
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Thank you so much, Auger! This was exactly what I was looking for. Before I call him back and deal with that hassle, is this something I could fix myself with a bottle of Windex?

(Just kidding about the Windex part, but not the fixing it myself part!)
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post #4 of 4 Old 08-19-2012, 06:53 PM
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Quote:
Originally Posted by Slimmfatz View Post

Thank you so much, Auger! This was exactly what I was looking for. Before I call him back and deal with that hassle, is this something I could fix myself with a bottle of Windex?

(Just kidding about the Windex part, but not the fixing it myself part!)
smile.gif

I would make them fix it (free of course), since they did it, but if you're handy, I guess you could do it. There's several youtube videos showing the replacement procedure. Maybe you can find one with a model similar or the same as yours. Just search "Mitsubishi white dots" or "Mitsubishi DMD chip".

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