How can I stop the colorful spotting in the display of my NEC NP410 Projector?

1,white spots appeared on screen,means the DMD chip is broken,you need a new DMD chip.
we supply the DMD chip and the price is USD200 ( new one)
it's life will be 6 years

Have a nice day!
We supply original projector parts: lamp, bulb, Lcd panel, Lens, DMD chip, color wheel,
motherboard, powersupply ... with high quality and competitive price.
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

this could be dust, or dried water spots from moisture

On a LCD PJ there is usually 6 polarizers. 3 IN Polarizers (one for each color...RGB) and 3 OUT Polarizers (again, one for each color...RGB). The blue polarizer that usually goes bad is the BLUE IN Polarizer.

It is usually a fifteen minute or job to replace the polarizer.

check the cable connetor

there are light filters behind each lcd panel that determine the color of light going through it. because of excessive heat and dust, the filter tends to burn and cause discoloration in the image. if the image is bluish (cyan), the red filter is burning. if it's yellow, the blue is burning. if it's purplish (magenta), the green is burning. the filters will need to be replaced. unfortunately, many companies don't sell individual parts of the optical engine, so the entire engine might need to be replaced.

This might sound like a worn spot in the (blue) lens from heat, or a bad color driver on the mother board. It could possibly be dirt or condensation behine the lens(s)

could be bad bulb is it setting in right is coler wheel freeley moving

it's the light polarizer on the blue lcd panel. it's fried due to excessive dust and heat. unfortunately you'll have to replace the optical engine.

If you're trying to project video, then the unit needs professional service. If you're trying to project from a computer, you may have a loose display cable, broken pins in one or both ends of the display cable, or broken conductors (wires) within the display cable. The computer sends its image information as a template of RED image components, GREEN image components and BLUE image components with the projector overlays to create the complete image with blended color values. (The computer also sends HORIZONTAL and VERTICAL synchronization signals, but those don'e affect the color content of the projected image.) That's why I'm suspicious of the display cable, conductors or pins.