White spots Mitsubishi EX240U

The EX240U uses a DLP imaging chip and a rapidly spinning six-segment color wheel (red, blue, green, white, yellow and cyan) to form the image. It is likely that the spinning color wheel has stopped with the red filter in front of the chip. I recommend opening the projector and see if you can coax the wheel to move and maybe it will spin once again. if not, it may be the wheel motor or the circuitry that affects the timing of the spin - either way, it will take a trip to the repair shop to fix.

Hope that helps.

https://www.youtube.com/watch?v=775YOs-aOPc



You have a bad dmd chip which is part of your DLP system. Here is a video of a similar repair on a 250u

white spot in image is comman problem of dmd chip it is fixed in to light engieen with heat sink replacment can possiable by expert

This is a dlp projector and has a bad DMD chip. Most models are very similar. Here is a video of a similar repair.

Same answer http://www.youtube.com/watch?v=775YOs-aOPc&feature=share&list=UU_Iacxxa-E63l6FhQjkcH8A

Most likely you have a failing DLP chip. The DLP chip is the one that forms the image that is projected onto the screen. Search for "Mitsubishi Black Dot" in your search engine and you will see you are not alone. Apparently, a lot of DLP chips in Mitsubishi products are failing. With the low price of projectors these days, your best bet is replacing it. If you want to repair it yourself, the chip will run you about $200 to replace and may require soldering.

Hope that helps,
Bax

Sounds like multiple problems the spots are the dlp/dmd needs replaced the lines are a bad cable or a loose wire inside. Here is a similar model video http://www.youtube.com/watch?v=775YOs-aOPc&feature=share&list=UU_Iacxxa-E63l6FhQjkcH8A

need new dlp chip.

if you have white or black spots its dlp chip. Here is a video of disassembly of a similar machine. http://www.youtube.com/watch?v=775YOs-aOPc&feature=share&list=UU_Iacxxa-E63l6FhQjkcH8A

I feel Most of DLP's getting this issue. Please tell me If the black & white dots are blinking....
To see it you need to put very clearly focused A4 sheet. If some dots are blinking .... most of time DLP chip is bad or getting bad.. IF can please upload a very clear picture......