[Prof.]

i am contemplating contacting optoma...

That's what I would be doing..
I believe the HD65 is a sealed unit, so it shouldn't be any dust showing up..
Something seriously wrong there...

 

[Prof.]

i have noticed that you are interested in the HD65. i wouldnt let my experiences alter your decision too much as i seem to be in a quite small minority with regards to issues.
and the problem you see is only apparent on the odd occasions when viewing.

It hasn't custard..I ordered the HD65 yesterday..from Canada :T
I'm also taking out an extra 3 year Woldwide warranty on the lamp..You get 2 lamps replaced in that time period..

I hope you get your problem sorted with Optoma..

 

[Prof.]

IME, there is no such thing as a completely sealed unit. This looks like a buldup of dust or some other contaminant.

Most if not all DLP projectors, don't have any filters..
So on that basis, they use some sort of sealed system..Otherwise they would be plagued with dust problems..

 

[Prof.]

That's pretty good service..:T
I doubt they would do that down here..

 

[Prof.]

It's a pity that sort of service isn't available everywhere..
I don't understand how one company like Optoma (and others) have different policies in different Countries! :dunno:

 

[Prof.]

This is beginning to look like an inherent problem with the HD65..

I've noticed with mine, that I get a very light greenish halo effect..circular in shape..on some light backgrounds in some ads. when watching TV..
The odd thing is that I don't notice it when watching a DVD..or Blu-ray

I've also tested it with the DVE disc where it shows a plain brilliant white in the Reference section, and there is absolutely no other colours coming through..
The colour bar pattern also doesn't show any artifacts..

What I have noticed is that the Grey Scale Ramp pattern does show tinting at the white end of the scale..and no matter what I adjust, I can't get rid of it..
I think this might be the same problem you have, only to a greater degree..

It would seem after all the work done on yours, that this is something they can't fix..

If there is anyone else here with an HD65, I'd be interested to hear whether you've had similar problems..or not..