I have little white dots showing up on my screen the size of pin holes. I just replaced the bulb 2 months ago.

these sound like pressure spots. Caused by pressure to the screen at some point. Often this requires the LCD panel to be replaced.

You need to replace bad DMD chip - contact Mitsubishi for replacement bulb, if you have a local tv repair that can fix it for you, Mitsubishi will send the bulb to them. I just had this happen to me a month ago. Cost me $174, Mitsubishi wanted $225 to send out their repairman.

The white dots indicate a problem with the optical light engine---Parts for this set are very expensive and my suggestion would be NOT to repair it but replace it.

If you want some more information Google the model with "problems" to see what the common issues are fot this set

I have 2 NP-200 projectors installed in a school which show white dots on a black background and black dots on a white background. This is caused by the DMD chip losing pixels. Only solution is to replace the chip, I'm researching now if that i an economical solution.

Mitsubishi that the one,who u should contact.Talk to them make some kind of deal with them to help u to do a repairing or replace the tv Light Engine Projection Block.That the tv problems,this problems a design flaw on the tv Light Projection Egine Block the IC they put in that causes of this white spots are showing up will continue showing up more and more white dots.It will not stops.

This is a known issue with Samsung DLP sets. Here's a link to the solution:

http://forums.cnet.com/5208-13973_102-0.html?messageID=3162774&tag=emfrnd#3162774

It seems you might have an issue with the dmd board. Go to the menu, and if the dots still show on the menu, the issue definitely is with the dmd board but if they don't come up on the menu, the issue will be with the video board.

your dmd chip is defect this a good job you must tack emgine apart calculate atleast 200 dollars

dirty lens, dirty mirrors, warped light guides, spider webs and mini-UFOs that fly across the inside can cause what you described.

but 6 months is pretty early for a cleaning but possible.

You have a bad blue LCD in the light engine. Replacement of the light engine is the only fix and it usually will continue to get worse over time