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Mitsubishi WD-C657 DLP has white spots on screen

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Old 01-11-2011, 10:14 PM   #1
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Default Mitsubishi WD-C657 DLP has white spots on screen

This may be a shot in the dark, but i'm looking for some input as to why my tv has well over 100 white spots shining on the screen.

I bought this tv from Costco on 2/20/2008 and almost exactly two years later i had the bulb replaced. The tv worked great after that until late summer this year when i noticed a white spot on the lower right side of the screen. Soon there were two dots and now i seriously can't count how many there are. When i view a bright background on the tv i can still see the white spots but can see even more dark spots. My wife thought we had bugs inside the screen. So we took the screen off cleaned the inside of the screen, cleaned the mirror, cleaned the bulb.... we cleaned EVERYTHING, and the spots are still there.

I called Costco's Conceirge Services a few days later and was told the tv was out of warranty and there was nothing they could do to help me. Thus far i haven't had a chance to call Mitsubishi directly.

So i thought i would come here and ask if any of you have had the same problem or might know why this is happening to my tv and what the fix is.

Thanks.
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Old 01-12-2011, 07:25 AM   #2
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Sounds like some stuck mirrors in the light engine. Time to call repair or replace probably.
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Old 01-16-2011, 09:57 PM   #3
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Default mitsubishi DLP spots

I have the exact same issue. It just started. At first there were just 3. Yesterday there were 4, and now there are 5. I was hoping to find a fix like clean the dust out of something, but I'm afraid by your post that will not help. Think I may just get a big plasma if more spots show up. It is interesting that I have not been able to find anyone else complaining about it. My next move is to go into a place that sells them. Maybe it's a common problem with an easy fix, but I doubt it.
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Old 01-16-2011, 10:18 PM   #4
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I had the same problem with my 5 year old Mitsu DLP. Called consumer relations. They had me find a local authorized repair company. They diagnosed it as a bad light engine - $650 to repair (1/2 for part, 1/2 labor). Mitsu said they didn't think it was worth repairing; but, I spent the last 2 weeks on the phone with them (back and forth). They offered me some steep discounts on a 60" DLP or a 46" LED LCD. Can't fit the 60" in my media nitch so I'm debating accepting the 46" offer ($1000) or whether to buy something else in this price range. If you want another Mitsubishi, you should definitely call them and stick to your guns! The price came down every time I talked to them...
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Old 01-18-2011, 10:50 PM   #5
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I knew there were other people out there with similiar problems like mine. I called Mitsubishi last week and naturally they told me all about how my tv was out of warranty (10months) and that i needed to contact an authorized service center. They gave me two numbers and the first one i tried was out of business. The second place i called gave me the information i needed to know- The optical lens is failing. I was quoted $1014 for the part and $235 labor based on me bringing the tv to them. They too advised me to call Mitsu and ask for a supervisor. If your Mitsubishi is showing a few white spots... i gaurantee you it won't be long before you will see more and more of them. So when i get a chance this week, i'm calling Mitsubishi back again and will apply a little more pressure and see where it gets me. Granted it wasn't the "most" expensive tv, but for the cost of the tv, stand, and one replacement bulb im in it over 2K and i just feel like as a consumer it should last longer.

I'll keep you all posted after i call Mitsubishi again.
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Old 01-21-2011, 08:29 AM   #6
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ouch! it sounds like you should replace it!
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Old 04-04-2011, 09:05 AM   #7
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Your dlp chip is defective. Try tvlampforless for a replacement.
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Old 04-04-2011, 09:08 AM   #8
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It is cheaper to replace the chip instead of the whole light engine.
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Old 06-01-2011, 09:43 PM   #9
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Hi, I have the same problem, I bought a 65" 1080P DLP HDTV and in two years I had to replace the lamp which cust around $200 and the next 2 years I saw a white spot on the left top corner then 2 spots then more and more startet to pop up now half of the tv is covered in white spots. This appears to be a defect in the tv since it happened not to one person but to multliple persons.
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Old 06-02-2011, 10:06 PM   #10
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As koloff mentioned - it is the dlp chip. You can get replacement chips for around $300 bucks, or the light engine for around $700 bucks. Currently trying to help a friend with the same situation - his tube is a WD-73734, and we are looking at upgrading his light engine to a WD-73738 for 3D capabilities. If anyone has converted, or even tried such, we would be interested in learning about the results.
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Old 07-03-2011, 10:11 PM   #11
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I was doing some checking and I have found something about dead pixels were the white spots. maybe we should start our own class action suit against Mitsubishi.
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Old 07-11-2011, 01:46 PM   #12
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Quote:
Originally Posted by bubba1915 View Post
I was doing some checking and I have found something about dead pixels were the white spots. maybe we should start our own class action suit against Mitsubishi.
Let me know how it works out as I have a Toshiba doing the same thing.
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Old 07-11-2011, 10:08 PM   #13
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I also have the white spots. Just replaced the bulb in January with in a week had white spot. Now over 50% of my 52in has spots.
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Old 07-13-2011, 11:35 AM   #14
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Default DLP Chip Replacement

The DLP chip is probably made by Texas Instruments. It is an array of tiny mirrors that tilt to adjust the amount of light reflected from the lamp into the optical system. They move VERY rapidly as they change for each segment of the color wheel. It's not surprising that after perhaps billions of cycles they start to get stuck. I would guess that the problem is most likely to occur after 2-3 years only if the set is used a lot. Mine is starting to spot and I would risk the $300 (a little less on ebay) to get a new DLP chip as there seem to be no other problems with the light engine. Does anyone know if it is feasible to replace this yourself? Is alignment critical? Remove the light engine and take it into a shop with the DLP chip and have them put it in? Your thoughts and comments welcome.
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Old 07-19-2011, 08:51 PM   #15
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Just don't move the adjustments.

I haven't done one in a while, if Mitsu covers the repair at all, I have to replace the LE. Mitsubishi only allows (under warranty) LE replacement, they don't sell a DLP chip.

If you take it to a shop, ask them if they've replaced the chips in Samsungs. A Mitsu. only shop probably won't be super familiar with doing this yet.

I don't think its hard, but I've been a tech for 25 years

Good luck,
Jim
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