Very dark iMac G3 screen?

Discussion in 'PowerPC Macs' started by JCLrox, Mar 10, 2012.

  1. JCLrox macrumors regular

    JCLrox

    Joined:
    Feb 11, 2012
    #1
    I opened up my summer 2001 iMac G3, and did a little bit of dusting on the inside. Quite a bit of dust and little pieces of junk fell out, but it did not look like any thing that actually broke off of the computer. I would think that it was stuff that fell in when the previous owner opened up the computer. When I put it back together and powered it on, I was very dismayed to see how dark the screen had become. It is quite hard to see anything. The brightness is all the way up, and I turned it up and down just to be sure. I shut it down then powered it back up, but to no avail. Could I have damaged something in the computer? Can I fix this? Thanks!
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    That's a sign of a failing flyback transformer. Did you open the CRT half of the iMac or only the computer half?
     
  3. JCLrox thread starter macrumors regular

    JCLrox

    Joined:
    Feb 11, 2012
    #3
    I took off the white bottom shell. Is the CRT half the part you can see through the top colored part?
     
  4. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #4
    You only accessed the computer half. The CRT half is in the colour shell. This isn't caused by your cleaning. It's caused by heat and old age. A lot of G3 iMacs are showing this problem.
     
  5. JCLrox thread starter macrumors regular

    JCLrox

    Joined:
    Feb 11, 2012
    #5
    So the computer can't be saved? Does it need a replacement part?
     
  6. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #6
    The flyback transformer can be replaced, but it is a very difficult part to replace and can be deadly for an untrained person to service.
     
  7. JCLrox thread starter macrumors regular

    JCLrox

    Joined:
    Feb 11, 2012
    #7
    So a replacement part is the only way to fix the computer?
     
  8. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #8
    Yes, unless you want to resolder thousands of wires the width of your hair.
     
  9. JCLrox thread starter macrumors regular

    JCLrox

    Joined:
    Feb 11, 2012

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