How to solve white spots problem on mitsubishi ex200u projector

With water only

1,the color starts to go out, it become the white and black,the color is disappear.
2,then,the projector running off after only a few minutes,
it is a general issue:the inductor need to be cleaned
Use a cotton swab moistened with alcohol to clean the inductor.
the inductor (Sensing element),is near to the Color Wheel.
the industor : is a black little element,as little as 3 sesame seeds
any questions, feel free to contact me
have a nice day!
Jerry,Lampdeng Limited

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

1,white spots appeared on screen,means the DMD is broken,you need a new DMD.

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global projectors is one source. You need to find out from Optoma the chip you need or take apart the machine and look at it. From China they run about 200 bucks. I've only done Mitsubishi so far.

need new dlp chip.

This is a dmd chip going bad. Here is the replacement on a very similar model. You would need to verify your chip number to be sure. Love to know if it is the same as the 250 and it probably is. http://youtu.be/775YOs-aOPc

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

Here is a video that shows you. http://www.youtube.com/watch?v=V_uUH-xHKkU

sounds like the DMD chip has faulty pixels