White spot appeared on Pro8200 image - AVS Forum
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post #1 of 8 Old 02-14-2013, 03:50 PM - Thread Starter
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I've had my Pro8200 for about 3 months and it's been working great and a major improvement to my previous BenQ W500. But just last night I noticed it has developed a white spot near the bottom right of the image. It almost looks like what would be a stuck pixel on an LCD. Is this a problem with one of the mirrors in the projector? I guess I'll need to send this in for warranty repair. Didn't think I'd have any problems this early but it happens...


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post #2 of 8 Old 02-14-2013, 04:12 PM
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is it a perfect square pixel? If not it could be dust on the DMD, either way if you have warranty send it back!
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post #3 of 8 Old 02-14-2013, 04:18 PM - Thread Starter
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Quote:
Originally Posted by airscapes View Post

is it a perfect square pixel? If not it could be dust on the DMD, either way if you have warranty send it back!

Now that I've looked at it on non black images I can see it is a perfect pixel, though some of the light bleeds into the surrounding pixels.
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post #4 of 8 Old 02-14-2013, 09:59 PM
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it is a stuck on pixel. if it is in the center of picture viewsonic will replace pj if under warranty. contact viewsonic and set up exchange. you pay shipping to them they pay shipping back. you will receive a newer pj. Takes approx 2-3 weeks turnaround. one of the dmd mirrors stuck in the on position.
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post #5 of 8 Old 02-15-2013, 04:59 AM
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I know the first year, viewsonic has express exchange, I believe it's much faster exchange than in 2nd or 3rd year. It might be free shipping both ways. He only had the unit 3 months.

Look at lens and see if it looks clean, and maybe clean it if dust on it. But it looks like you will have to replace the PJ.

A couple of questions about your setup. Is the PJ well ventilated, are you ceiling mounted . How many hours on bulb? How many hours have you used it a day? Is there anything about your setup that could cause this? It's probably good to discuss it, just to make sure, so, you don't have repeat problems later on any PJ. Some people place it on ceiling mount or somewhere where airflow is limited and that could cause component problems with heat stress sooner then later. Also, good to let newer members know to make sure the sides get plenty of airflow. Now, it could just be one of those things that can happen, we are just troubleshooting.
I know it would bum me out if it happened to me. Let us know how viewsonic support treats you and post.
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post #6 of 8 Old 02-15-2013, 09:21 AM - Thread Starter
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Thanks for the responses guys! I did attempt to clean the lens as well but that did nothing. It's pretty much a perfect pixel that is stuck on. It's not in the centre of the picture but it's extremely noticeable, especially on dark scenes. I'll contact ViewSonic about it, hopefully they have the "express exchange" in Canada too.

The projector is on a coffee table with no objects blocking the vents. I use it fairly heavily and it has around 750 hours on it in Eco mode. I'll let you know how the support goes. Thanks!
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post #7 of 8 Old 02-15-2013, 09:27 PM
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RTAA nothing he did caused the dmd to fail it just fails. Viewsonic policy in USA is you pay to ship it to them the first time only. They pay every shipment after that no matter how many machines it takes. They dont ship out replacement until they receive the pj. Being that he is under 90 day warranty it might be quicker if he returns pj to seller and do exchange there.They use FED EX in the USA dont know who they use in Canada.
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post #8 of 8 Old 04-06-2013, 06:47 AM - Thread Starter
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Not too long after posting this the white dot/pixel went away for a day and then reappeared. A week or so later a a second white pixel appeared and just recently both went away. But now there is a noticeable aberration in the top right of the image that shows up more prominently on viewing a white background. It almost looks like the filament of a light bulb vibrating and has a rainbow effect to it.

Has anyone experienced something like this before? It must be defective and I'll be looking at getting a replacement but I'm just curious if this is related to the DMD as well? Thanks
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