dead pixel or dust?

Discussion in 'Projectors, Screens & Video Processors' started by Graham, Apr 2, 2002.

  1. Graham

    Graham
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    my new AE 100 has a couple of pixels (only one noticeable really from 6ft back) which appear dead, but these two green dots certainly don't take up the space of a whole pixel, rather just the corner of one. One is on the left side and the other near the centre/bottom of the picture. They also darken a little if the image is dark. They are in focus when the projector is so I guess they're not dust.

    So do dead pixels take up a whole pixel size - or can they be smaller dots like mine?

    Thanks for any advice
     
  2. Timh

    Timh
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    Bump


    Interesting question, has anyone any idea's.
     
  3. Kramer

    Kramer
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    Can you post a picture of the problem?

    Go into the service menu, where you can run red, green & blue screens, with various pixel arrays. This will show clearly the offending pixels.

    A pixel can only be dead or open. Can't have one half or quarter defective etc...

    Try to take some pics, from the service screens preferably.
     
  4. Graham

    Graham
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    Hi

    Unfortunately I don't have a scanner so can't really post a picture. But on an interesting side note, the green dot in the left third of the picture only seems to become bright after a while! Watched a dvd the other night and it only appeared after a couple of hours, while last night I checked via the blank background 'shutter' image and it appeared after ten minutes. Now i'm even more confused. I can only think it might be dust on the actual panel, as surely a pixel wouldn't go 'on' and 'off' on such a frequent basis?

    Thanks again for any suggestions
     
  5. Kramer

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    My "open" blue pixel starts as dead & gradually becomes "open" anything from 10mins to an hour after startup!

    This should confirm you have a faulty pixel.
     
  6. asokas

    asokas
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    A related question....

    Do the number of dead pixels grow over time with use of the projector?
     
  7. Timh

    Timh
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    Apparently not, but I did read somewhere that you should take care and not knock your projector, or this may cause damage to pixels. I do not know if this is true or not.
     
  8. Kramer

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    Graham,

    You have a new PM!
     

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