The projector has several white dots on the screen. how can i fix it, it started with a few white dots then every time i used it, it doubles and doubles until it became many dots.

The DLP chip is starting to go bad, and unfortunately the only fix to have it replaced.

Sanyo PDG DXL100 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 We supply original projector parts: lamp, bulb, Lcd panel, Lens, DMD chip, color wheel, motherboard, powersupply ... with high quality and competitive price. any questions, feel free to contact me have a nice day! Jerry Lampdeng Limited

Here is a link to a forun that explains whats happening.
http://www.avsforum.com/t/1441789/black-and-white-dots-all-over-my-projector-screen-what-causes-it

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

Hi Emmanuel,

I think your projector lamp and LCD area is dusty.
please use pressurized air can and clean the area.also check the dust filter.
do it carefully.
regards,
nuwan

Your dlp chip is going bad and cannot be fixed economically. Several of the mirrors on the chip are hanging up and they won't come back. It will just get worse. My Sharp XR32X is doing the same thing. New projector time.

I have several white dots all over the screen. They're more that pops up as I watch it and the dots never goes away. Does anybody know what I need to do to fix this problem? Thanks..

perhaps it is the reason of DMD chips,
if the DMD chips had been bad, it will show some white or dark dots on the screen, it looks like that this machine need 1076-6038B DMD, but I can't make sure. so need you to find a repair man help you to reconfirm it.
this DMD is not expensive, so please don't be worry aobut it,

Jacob, what element on the mainboard is the source of these dots? I have the same problem - it is only one dot now, but I think there will be more with time.
Also, the second question is: how do I unscrew the mainboard from benq W600+? I remoced the metal cover, unplugged all the cables, but there's something still not letting the board go.

I have the same problem. All of a sudden there are plenty white dots all around the screen. As if 1/3 of the pixels are burnt. It cannot be the lamp because it is still as bright as before. It must be the internal screen or whatever. The "Troubleshooting" section of the user manual does not mention such thing.