It's likely a bad DMD chip. Did your friend purchase an extended warranty?
Hello, I bought a Samsung HL-S4676S yesterday from a friend of mine because he had a bought a new tv. I noticed that there are three small white dots on the screen, which are non moving. I still have his orginal sales receipt and all of the paper work and everything. I was wondering what could be the problem with it, because I would like to keep this tv for as long as I can, seeing as it is a very nice set. If you could tell me what the problem is with the set, that would be greatly appreciated.