Hello, there were many points white on my projector (Acer p1110)
On DLP projector there is a DMD chip which can cause white spots.
I decided to open my projector.
I found the DMD chip which was defective.
I changed the chip and now, everything works.
i made a pdf document which show how i did it.
the document is on a public link (https) on dl.dropbox.com/u/5195875/CHANGERLAPUCEDMD.pdf
Eric.