Stuck Pixel on CRT?!

Discussion in 'Macintosh Computers' started by sockeatingdryer, Jul 18, 2004.

  1. macrumors regular

    sockeatingdryer

    Joined:
    May 28, 2004
    Location:
    Athens, GA, USA
    #1
    I knew that wasn't possible... until now.
    My eMac's CRT has what appears to be a "stuck pixel." Just a tiny black dot about the size of an LCD pixel smack dab in the middle of my screen What on Earth can I do to get rid of it? (And you'd better not suggest cleaning... LOL)
     
  2. macrumors 65816

    Joined:
    Mar 13, 2003
    #2
    how about a picture?
     
  3. jsw
    Moderator emeritus

    jsw

    Joined:
    Mar 16, 2004
    Location:
    Andover, MA
    #3
    I don't think he'd be able to focus enough to provide a picture. A screen capture obviously wouldn't do the trick....
     
  4. macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #4
    You can massage it out. :p

    CRTs can have screen defects too, a bubble/scratch/crack in the glass, foreign object on the grid, dead spot on coating, etc.

    Of course quite a few people complain about the horizontal line(s) across the screen.
     
  5. thread starter macrumors regular

    sockeatingdryer

    Joined:
    May 28, 2004
    Location:
    Athens, GA, USA
    #5
    "Dead Spot"

    That's more like it. It's just a black speck on the screen, just a tad distracting at times.
     
  6. macrumors 603

    Joined:
    Mar 2, 2002
    #6
    Right. Stuck pixels mean they don't change colors, or stay pretty much the same color. Dead pixels/spots are, well, "dead"... black.
     
  7. macrumors 65816

    Timelessblur

    Joined:
    Jun 26, 2004
    #7
    if possible try degusins (sp) the screen. I had something like that happen on the CRT the familay computer use and the Degauss fix it. CRT need to have that done on them from time to time (I am to lazy to explain how it all works)
     
  8. thread starter macrumors regular

    sockeatingdryer

    Joined:
    May 28, 2004
    Location:
    Athens, GA, USA
    #8
    Well, from what I understand the eMac degausses itself when you wake it from sleep... how would you degauss it manually?
     
  9. macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #9
    There is probably a Degauss button under System Preferences/Displays/Geometry(i think)
     
  10. thread starter macrumors regular

    sockeatingdryer

    Joined:
    May 28, 2004
    Location:
    Athens, GA, USA
    #10
    Nope, not a degauss button.
     
  11. macrumors 65816

    Timelessblur

    Joined:
    Jun 26, 2004
    #11
    I think you can go out and by something that can cause things to degauss. If I remeber right it a powerful magincte. On computer monitors there is a wire wrap around the CRT tub that is charged when it is degaussed (otherwise big electormagentce). But do not try any old magnectc and dont take my word from it. I am working from shady memory here but I do believe they make a kit that can do it
     
  12. macrumors 6502

    Joined:
    Jul 4, 2004
    Location:
    New Zealand
    #12
    hmm, don't want to alarm you too much but... years ago I came across some really old CRT's with dead spots, and some technician said that they're really bad, apparently they are holes in the phosphors, which allow radioactive electrons to pour out by the bucket load!!! Now that I've alarmed you!... I'm gonna go do some research about it and get back to you =] :D
     
  13. macrumors 6502

    Joined:
    Jul 4, 2004
    Location:
    New Zealand
    #13
    Hmm, the only google I found, said they could be cause by a shadowmask fault, I'd give Apple a call about it. If its a hole in the phosphor layer I think that could be quite bad, since electrons will be beaming out at you.
     
  14. thread starter macrumors regular

    sockeatingdryer

    Joined:
    May 28, 2004
    Location:
    Athens, GA, USA
    #14
    I think I might call AppleCare after all my 4-H stuff is done... next week. I've had some sort of 4-H trip every week this month, and two weeks last month. Busy summer... :cool:
     
  15. macrumors member

    Joined:
    Jun 26, 2004
    Location:
    Athens, OH
    #15
    better hold off on the degauss

    Manually deguassing would require, you guessed it, a degausser. This is an electromagnetic device that you wave infront of the screen and it scrambles up the phosphors and basically resets them to how they came from the factory. We used to do this all the time where I worked to get rid of the green tint caused by having a CRT too close to speakers. We even found that a hand held audio tape demagnitizer worked well. You could probably get something like this at radio shack but...we were using these on plain old CRTs you might want to check with an expert first before you go waving a powerful magnet around your hard drive and mobo. That might cause more problems than it solves.
     

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