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Dark spots appearing on Mitsubishi HDTV screen

traprh
06-17-2006, 09:56 AM
I purchased a 62" Mitsubishi DLP HDTV about 16 months ago and it has generally been working fine. Recently I noticed some dark spots appearing on my screen (in light screen scenes). There are currently about 4 or 5 of them about the size of a silver dollar. They are located in about a 2 sq ft area, centered on the screen about 16" down from the top of the screen.

Seems like I read something about 18 months ago on this potential problem with Mitsubishi sets but it didn't start to appear on mine until recently.

Any comments or suggestions regarding the problem or comments as to what I should do. I've contacted my dealer but he was no help. I've yet to be able to get a Mitsubishi rep to talk to me. I have a 5 year extended warranty on the set which originally cost me about $5000 in Jan 05.

rudyusmc1980
06-17-2006, 06:10 PM
well then it's a no brainer. call in the extended warranty people. Carefully read the terms, you most likely are entitled to one cleaning per year. This is exactly what you need, IMHO. dust, even with the filter in the side, (which you should be cleaning every six months or so (what, you don't know what I'm talking about? well, clean it before the tech arrives...))

there are two mirrors and a lense in these monsters. most likely the lense or first mirror is dusty. Do not let them wipe the lense. only use compressed air!! it is fine to wipe down the mirrors.

traprh
06-17-2006, 06:52 PM
Rudy--thanks for the input. My question is; how do you get to the lense/mirrors to clean them? Are they easily accessable without having to tear the set apart? I have misplaced my manual but when I find it, I'll look to see if they have any "user maintenance" instructions.

rudyusmc1980
06-17-2006, 09:05 PM
http://highdefforum.com/showthread.php?t=23973&highlight=step

to get at the mirror/lense, the front screen has to be removed. it comes off as one unit, pretty easily.

remove the lower front facia, being careful of any wires/connections. the front panel controls and card reader slot stuff is here. it all disconnects by undoing the cable connectors. behind the facia, you will see that the screen assy is resting on two screws, one on each side. loosen but do not remove! Now, remove the screws from behind the tv, they go all the way around the left, top and right sides. Make sure the front panel controls are disconnected, and with a friend, lift the screen up and out from the tv. Each side has a hook that is the only thing holding the screen upright at this point. place it carefully down, I would not want to lay it flat, preferably with the 'top' on the carpet because the side posts seemed pretty flimsy to me.

You now have access to the mirrors and lense. Vacuum out any spiders, and wipe down all the plastic surfaces that have dust on them. clean the large mirror with whatever, i used monsters screen cleaner and lintfree cloth. Spray outside of the enclosure! Clean the small mirror next, and be careful of the circuit card down there, it is the infrared receiver.

only use compressed air on the lense.

reassemble and enjoy!

I still suggest you get the warranty to do all this if they cover it. mine was damaged in a move, and they would not pay for any of it, so I had to pay parts and fix it myself.

good luck.

traprh
06-17-2006, 09:40 PM
Rudy--thanks a lot. I think I'll call the warranty people and see if they can have it done before I tackle it. If my policy doesn't cover it, then I'll have to do it myself. Thanks again.

I noted in one of the reference posts that a "glare free screen" upgrade was possible for 500 and 700 series owners. Mine is a 62725. I always hated that shiny screen and it picked up all of the background lighting. It would be great to have a glare proof screen. Any additional info on that upgrade?

rudyusmc1980
06-18-2006, 09:08 AM
two options for that, actually three. you can remove the front protective screen completely. You can do that and purchase a trim kit that will give it a finished look. Third you can upgrade to the 800 series protective screen. haven't checked costs lately.

The cheapest fix is #1 or probably to upgrade your window treatments or move the tv around the room so glare is not an issue.

aquaman114
01-10-2012, 08:09 PM
I also have the same issue with my Mitsubishi DLP. I thought I was reading my own story. It is 4 years old, I've replaced one bulb after 2 years and a couple of weeks ago I got my first white spot. Now their are about 7 with numerous black spots as well. Hopefully Mitsubishi will do something about it at least. I will post results as well. Very unhappy with an expensive tv at the time.