Ok lets start. I am an electronic tech, but this is the first DLP set I have worked on. It cam in with the notorius red screen. Tried the memint and factory reset. No advaile, so order in an complete light engine. After replacing the light engine I now have an green screen..In the service menu you cannot adjust the drives or cutoffs. On the old light engine I could adjust these. Any techs have input on this..Or ask me more questions and I will answer them.
PPS I also saw that (from another post) you can hook up laptop to set? if so anyone know how..
Give me some help:
1. What input are you useing, if any?
2. Do you have OSD or VIDEO??
3. Did you reinstall old 'LE' back into TV???
4. Did you double check the TV's Model number vs part number received????
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Re: light engine replacement
Good Day, tech;
Let's suspect poor cable connections or pinched, BUT I have received bad light engines. Make sure you ordered the correct Part Number. There are two (models) of them; check Model Number, some are 50V500 and 50V500A.
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Your repair tech hinted correct. Although the bad connection will likely be in the power supply, it actualy can sit everywhere the power goes. Can be anordinary plug / connector with a little oxidatin, or a dab soldering point. Or perhaps a electrolitic cap, slowely dying.
Let the tech do his job. He has the tools, education and skills to keep your beloved TV alive.
Inside the light engine all the mirrors are probably fogged. If you attempt to clean them make sure, I repeat make sure they go back the same direction and place they come out of... let me know what you find out : Expert-tech / Sam
Hi, I have a mitsubishi 65" DLP model # 65733 that I bought in December 2007 brand new, about six months ago I started spoting white dots on my screen that started blinking and then became permanent, thinking is was dust I cleaned everything inside with compressed air without success.
The stars multiply daily to a point that it was intolerable to watch anything with all the white stars and a few black ones that showed up.
We called mitsubishi but got no where, I was out of warranty. (they still deny having a problem with their DLP's)
I had a service tech inspect the tv and was told it could run about $800 to $1000 to replace the light engine with refurbished parts with 90 day warranties.
Researching on line I came across a DLP chip that is compatible with several mitsubishi and samsung models, so I decided to chance it, and replace just the DMD chip before we trash the tv, it was unthinkable to pay $800 to repair a tv that we could buy now for under $900.
Thanks God the "gamble" paid out and the problem got solve with just $150 DLP chip in about 15 minutes of my time.
If you are not mechanically nor electronically inclined, I recommend you use a technician for the installation, but don't let anyone tell you you need to replace the whole light engine, it is a ripoff.
If your problem is just white or black dots on the screen that do not move.......this will solve your problem!!
P.S. Hope this will help you and for the record..... "I will never buy a mitsubishi product again".
There are several different types of projection sets: some use 3 picture tubes, red,green,blue--if this kind of set is what you have the coolant used in the blue tube is bad-----this type of problem leaves red and green which = yellow.
Most common in Samsung, Philips, Magnavox type sets.
If it is a newer set without picture tubes (a dlp style set) yellow in the middle of the screen would denote a damaged optical light engine.
Let me know brand, model number, date made----all are on back of set.
Check your color wheel. There is a DIY guide for replacing the color wheel. Mine did the same thing yours is and my color wheel was all busted up. Unfortunately after replacing the color wheel my set continues to do the same thing, but this could mean I need to replace the ballast as well.
rear projection tv can be crt or dlp, if crt, try to adjust red color using the customer convergence feature, you will find it in the customer menu usually under advance feature or video settings, some tvs will just give the convergence caption right on the menu listing. If this does not help then the tv might be in need of some convergence circuit repair, probably one of the power outs is damages and needs to be replaced. If it is a dlp if the red shade extends all over the screen or located in a certain area of the screen then i would have the tech check for light engine trouble, this is a common problem on some dlp systems.if i answered your question satisfactorily please leave your positive feed back. thanks
sound like light engine bad mirrors get stuck on ic dmmd "digtal micro mirror device the mirrors get stuct replac ic if u do not have smd soldering exp do not attemt but u can order dmmd ic from samsung or nte electronics.con 50.00$ ic this should fix ur problem have exep tech solder in 4 you 2 replace light engine $900 u get the picture tryin to save u a$ with perfect results hope this help u later bud!!!!!!!!!!!!!!!!!!!!!! shan