Please help- PB G4 display prob

Discussion in 'Mac Basics and Help' started by Rend It, Dec 17, 2006.

  1. Rend It macrumors 6502

    Joined:
    Oct 27, 2003
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    United States
    #1
    Help! I don't know what's happening, but my Al PB G4 started doing this intermittent thing with the screen, and I don't know what I should do. It appears to me to be a hardware issue- I've rebooted several times, tried adjusting the graphics settings, etc.

    I notice the pink rectangles usually go away after tapping directly above the trackpad, only to come back later at random. The warranty just expired in October. Should I bother trying to plea my case to Apple? Could it be something simple like a loose connection or bad cable? Or is it indicative of a bad logic board? Any advice/help is greatly appreciated.

    rendit

    Picture 1.jpg
     
  2. 2nyRiggz macrumors 603

    2nyRiggz

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    Aug 20, 2005
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    Thank you Jah...I'm so Blessed
    #2
  3. benthewraith macrumors 68040

    benthewraith

    Joined:
    May 27, 2006
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    Miami, FL
    #3
    There was someone else around here who had a problem like that way back, but I can't remember who it was...:(
     
  4. Rend It thread starter macrumors 6502

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    Oct 27, 2003
    Location:
    United States
    #4
    I have not yet tried that, but I don't see why resetting the Power Management Unit would affect the video. I will give it a go anyhow. Since my original post, I have checked the Apple discussion boards, and it seems that the consensus there is that my video memory has tanked. FYI, I plugged in an external monitor, and the pink lines appear on it, too. :(

    The only straightforward fix is to replace the entire logic board, which will set me back about $600. I think this is crazy, so I will be calling Apple this week, in hopes that they will help me out out somehow. I will keep you posted.

    rendit
     
  5. techster85 macrumors regular

    Joined:
    Oct 17, 2006
    Location:
    Lubbock, TX
    #5
    man, 600 bucks is steep considering you could get into a low end mac book for just a couple hundred more...does anyone know if this is a common occurance in the AL PB's? and if so, is there any way to avoid this happening? Hopefully apple will show mercy and help you out though...
     
  6. aquajet macrumors 68020

    Joined:
    Feb 12, 2005
    Location:
    VA
    #6
    Do you have your original restore disks? If you do, try running the Apple Hardware Test. That will test your VRAM, among other things.

    It definitely looks like the problem could be a result of faulty VRAM.
     
  7. Rend It thread starter macrumors 6502

    Joined:
    Oct 27, 2003
    Location:
    United States
    #7
    update- temperature dependent issue?

    Just wanted to update the thread.

    I did the following (in order):
    1) Reset PMU: no change
    2) Reset PRAM: no change
    3) "Quick" Apple Hardware Test: AHT reports no HW issues
    4) "Extended" Apple Hardware Test: AHT reports no HW issues

    Since doing all of these things (including several re-boots), I've noticed the problem is slowly becoming more difficult to reproduce. Before, I could just tap the case here and there, and the pink stripes would come and go. Now, the problem has vanished, no matter what sort of handling, short of abuse or dropping it. The one thing that has changed since I began the tests is that the computer has warmed up significantly. My next plan is to let the computer cool down quite a bit, and then try to re-run the AHT. I'll let you know soon.

    rendit
     

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