Getting closer to fixing my 12 inch G4 PowerBook! But I need help..

Discussion in 'PowerPC Macs' started by nickdylan, Aug 6, 2012.

  1. nickdylan macrumors regular

    Joined:
    Mar 17, 2012
    #1
    Hey forums! I posted a few months ago about my sad, dead 12 inch G4 (1.5ghz, 1.25gb RAM) looking for help on getting it to run and got lots of helpful suggestions, but I sort of dropped off the face of the earth for a few months until spring semester was over. Now I'm back and have free time and am at it again. Here's what's up:

    When I turn on the G4, it makes the boot up chime and goes to a grey (or white?) screen. No picture at all, just white-grey. It flashes a couple times then stays like that. When I tried to use an external display, the external turned pale blue but that's it. I tried resetting the PRAM, booting into single user mode or safe mode, etc, and got nothing. So I set it aside for a few months until summer came.

    Just today I firewired it with my G4 Sawtooth tower and couldn't read the hard disk. I erased it completely, checked it (no problems), and installed 10.4 on it (10.4 is the only OS installation DVD I have, and it's the one I like best, though I think 10.5 should run on it as well).

    The G4 now works fine with an external display. Progress! Unfortunately, there's still the little problem of that grey-white screen.

    So here's what I'm thinking: There are replacement LCDs on Ebay for like $30, but I'm not sure if the LCD is what's wrong. I mean, it doesn't *seem* broken, there are no cracks or anything. I don't have another PowerBook to test the monitor in, either. Any ideas on what could possibly be wrong with it other than the LCD? I know how to replace the HDD, RAM, and Keyboard but I've never touched the LCD before and I'm a bit nervous about it.

    Any ideas or advice would be very welcome :)
     
  2. zackkmac macrumors 6502a

    Joined:
    Jul 7, 2008
    Location:
    Tulsa
    #2
    According to this thread, one user with the same problem went through three displays with no luck.

    http://hintsforums.macworld.com/archive/index.php/t-98332.html

    So it could also be the logic board or display inverter. I would take smaller steps first - begin with the inverter, if not then try a new LCD panel, and if that doesn't work, it very well may be the logic board. Also check all internal connections.

    Hope you solve it though. :)
     
  3. max¥¥ macrumors 6502a

    Joined:
    Aug 7, 2008
    Location:
    Over there....
    #3
    check the lb - > screen cable. I had this once on a g3 ibook after rebuilding it and it was that cable that was unplugged
     

Share This Page