Troubleshooting Powerbook 12"... nothing on the lcd

Discussion in 'PowerPC Macs' started by macbwizard, Sep 29, 2008.

  1. macbwizard macrumors 6502

    macbwizard

    Joined:
    May 23, 2005
    #1
    Hello there- thought you guys could help me troubleshoot this powerbook that just fell into my possession.

    It's the 1.33 MHz version, 12", 256 MB RAM, etc

    Anyways, when I press the power button, I can hear the boot chime but the LCD does not show anything. I took it apart and found that there is no hard drive in the machine. After putting it back together it is still acting in the same way.

    Even without a hard drive shouldn't it still show a gray screen and perhaps a flashing question mark on boot?

    I have tried resetting the PRAM (but for some reason I don't hear more than one chime making me think that it's not doing anything). I have also reset the PMU.

    I am in the process of getting my hands on a mini-DVI adapter so I can check it on an external display.

    Any Ideas?

    Thanks much.
     
  2. macbwizard thread starter macrumors 6502

    macbwizard

    Joined:
    May 23, 2005
    #2
    I just tried to use an external display and nothing... not looking good.
     
  3. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #3
    The PB is known to have defective soldering on the motherboard that would cause the graphic cards to come loose; this sounds just like that.
     
  4. macbwizard thread starter macrumors 6502

    macbwizard

    Joined:
    May 23, 2005
    #4
    Wonderful! Any fix? Is it possible to solder back on?
     
  5. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #5
    The easiest and possibly the only fix is to buy a new motherboard.
     

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