I have optoma pk301 pico projector. suddenly few white spots have appeared on screen which do not go away

Please check the cable ,this problem looks with your RGB cable

it is not correlated with bulb
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

We supply original projector lamp,bulb,accessories,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
any questions, feel free to contact me
have a nice day!
Jerry,Lampdeng Limited

1,white spots appeared on screen,means the DMD chip is broken,you need a new DMD chip.I supply the DMD chip and the price is USD200
any questions, feel free to contact me
We supply original projector lamp,bulb,accessories,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
have a nice day!
Jerry,Lampdeng Limited

1,white spots appeared on screen,means the DMD is broken,you need a new DMD.
2,the projector running off after only a few minutes,means the Inductor (Sensing element),near the Color Wheel. Use a cotton swab moistened with alcohol to wipe the Inductor.

Have a good day!
We supply original projector parts: lamp, bulb, Lcd, Lens, DMD,
motherboard, powersupply ... with high quality and competitive price.
Jerry China
Tel: +86 131788 67858
E-mail: [email protected]
Skype: lampdeng.com
YM: [email protected]
http://facebook.com/lampdeng
http://www.lampdeng.com

Its a bad DMD chip. Seems this is a common problem with the PK-301's sadly. Mine is out of warranty and a new chip runs about $180.

Hi there:
You directed this question at me, but unfortunately this isn't my expertise and I am unable to provide you with a real solution at this time.

Hopefully one of other experts will be able to provide you with a real solution.

Thank you for using FixYa

as greg instruction, it is very detail,

usually, white dots problem is reason of the DMD. perhaps the manufcaturer can't directly and singly sell a parts for end user, they always let you send broken machine to their repair store, then ask for high repair cost.

actually, optoma HD67 projector with 1280*720 pixels, so i think you should buy a 1272-6038B DMD chips, if you need further help, please freely contact me again,

Did you let the projector sit with that slide on for a while? If so, what you have is called burn-in and it is when the image gets kinda locked into the LCD, and it will show up as the LCD get warmer. If you still have a warranty, I would return it for a new one, and make sure that the images used on it don't remain fixed for a long period of time. Hope this helps!

if it is a DLP projector then the DMD on the engine is likely bad or the main board is bad. The white things are pixels.