Repair G3 IBook

Discussion in 'PowerPC Macs' started by Ball, Aug 8, 2007.

  1. macrumors newbie

    Joined:
    Aug 7, 2007
    #1
    My sister sent me a G3 Ibook that won't turn on. I was told that the problem may be the logic board or a CMOS battery. When I say it won't come on I mean nothing happens not even a sound. The main battery is fine.

    Here is what I cannot figure out. I can't figure out how to open it up to get to the logic board I take out the screws and the back/bottom will not come off. I don't want to force it because it seems kinda flimsy.

    There are no Mac Repair shops near me and I don't know if it is worth putting any money into it although I would like a Mac so I can use Garageband.

    How do I take this thing apart?
     
  2. macrumors 6502a

    shu82

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  3. thread starter macrumors newbie

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    Aug 7, 2007
    #3
    There is nothing on that site that tells how to open it up. I have removed all the screws on the case and I still will not come apart.

    Are the little feet on the bottom also screws?
     
  4. macrumors 68020

    Artful Dodger

    Joined:
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    #4
    Yes to the feet as you need to pull them out/off but be carful doing so. Also I think there is a screw where the battery is but I don't remember off hand.
     
  5. macrumors 6502a

    mick4394

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    Location:
    Flyover country
    #5
    Taking the bottom case off is the biggest pain about servicing an iBook. It does require a bit of brute force, especially on the back edge.

    Just be very careful around the DC-in board.
     
  6. macrumors 6502a

    mick4394

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    #6
    There are three inside the battery compartment. One for the top-case. Two for the bottom-case.
     
  7. macrumors 6502a

    mick4394

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    #7
    Really, though, if you're having this much trouble with the case, maybe servicing this thing yourself isn't the best idea.

    I do this for a living, and find servicing an iBook to be, somewhat, challenging.
     
  8. thread starter macrumors newbie

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  9. macrumors 68020

    Artful Dodger

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    #9
    Thanks as it took me some time to find the 12" iBook I took apart and counted the screw holes in that area. I'm glad I put everything in separate bags and labeled them to cut down on the stress :p

    Yeah if your not sure or have mixed feelings about doing this I'd think twice and get some help or have someone do it for you. Just don't lose any screws and take it easy when putting them back in.
    Good luck…;)
     
  10. macrumors 6502a

    mick4394

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    #10
    I remembered off the top of my head.

    How pathetic is that? Unfortunately, I could probably dismantle a G3 iBook with my eyes closed. I've taken these things apart more that I'd care to remember.
     
  11. thread starter macrumors newbie

    Joined:
    Aug 7, 2007
    #11
    I have it opened now and I am going to try that quick fix of putting some business cards under the GPU. I hear that it becomes de-soldered.

    Also, if the motherboard is fried how do I identify the speed 600 700 ect..?

    I don't want to put much money into this because it's old and there are no Mac repair people nearby. The closest one charges 90 dollars just to look at it. I think a new board is 250 bucks.

    I really want a Mac but I can't afford a G5 and I am a bit leary of the G4 logic board problems. I have read there is a 15% failure rate. Is this true?
     
  12. macrumors 6502a

    shu82

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    Location:
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    #12
    It is an art. I can break down and reassemble a g3 ibook blind folded after drinking a pint of whiskey in under 5 minutes. (that would make a good youtube video;) )The first time is really hard. My room mate thought I was crazy.

    There are screws underneath the rubber feet. Also there are 2 screws in the battery bay. After they are all out you can pop it open with a butter knife or whatever you have.

    I would recommend humming the Macgyver theme song while you do it.

    Make sure you're careful. Dont do it on carpet, and ground yourself during the process.
     
  13. macrumors 6502a

    shu82

    Joined:
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    #13
    If the Motherboard is fried it doesn't matter what speed it is. Also a cigarette box folded in half usually worked good for me.

    You are rolling the dice on any ibook when it comes to logic boards. You just have to live with it/fix it. My wife loves hers.
     
  14. macrumors 6502a

    mick4394

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    #14
    That fix will not solve your problem. That solves a very specific problem that causes a loss of video, and it doesn't do it very well, I might add.
     
  15. macrumors 6502a

    mick4394

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    #15
    For the G3, I'd say 15% is being a bit conservative.
     
  16. thread starter macrumors newbie

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    Aug 7, 2007
    #16
    I am only guessing that it is the logic board. When I try turning it on nothing happens at all. No light no sounds. The battery and the power supply are good.

    Someone told me it could be the CMOS battery. Does this machine even have one and if so where would it be?

    Why won't any thing not even the fan come one?
     
  17. macrumors 6502a

    shu82

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  18. macrumors 6502a

    mick4394

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    #18
    Does the charger light up when plugged into the book?

    FYI, it's not going to be the CMOS battery.
     
  19. thread starter macrumors newbie

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    Aug 7, 2007
    #19
    Yep the charger lights up and the battery has juice.
     
  20. macrumors 6502a

    mick4394

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    #20
    If it's as dead as you're saying, chances are, the only thing that will fix that iBook will be a replacement logicboard.
     
  21. thread starter macrumors newbie

    Joined:
    Aug 7, 2007
    #21
    I did shim the GPU and no luck.

    I read to try this: Hold down command, option, p & r keys while restarting.

    This may sound dumb but which key is the command option? The key next to the control key is missing.

    I'm thinking this may be a lost cause. If the logic board is fried it is not worth fixing it. Right?

    It was also sugested that I leave the battery out for a week or two.

    Quote from another G3 user "I had the same problem with an ibook G3 800Mhz dual USB.
    It worked fine and then one day it did not want to start. I did a PMU reset but nothing. It would power up after sitting there for two days or a week. Then I took the ibook apart to check the logic board and I notice that there's a battery (like the CMOS battery on PC) soldered on motherboard. I noticed that there was some leaked black goo. I took the black plastic covering the battery off and cleaned up the goo and added solder to the points. After doing this the ibook started right up with the power adapter. THen attached battery and started to charge. I left it on all night and never turned off. Still working now. Hope this helps a little. "

    I'm thinking that when that capacitor/battery on the logic board loses its charge perhaps the logic board will reset??? Does that make sense?
     
  22. macrumors 65816

    barr08

    Joined:
    Aug 9, 2006
    Location:
    Boston, MA
    #22
    This is an incredibly common problem. There are two viable solutions, short of replacing your LB, and neither are permanent. The first is the one you are trying, wedging something in there, the second is soldering it.

    I reccomend just selling it whole, or parting it out to sell it.
     
  23. macrumors 6502a

    mick4394

    Joined:
    Oct 25, 2006
    Location:
    Flyover country
    #23
    The problem he is describing is not the common iBook, not video problem. He can shim it all he wants. It simply does not apply.

    His iBook is completely dead. No chime. No power. No nothing.

    Typically, iBooks without video, are actually working iBooks. If you hook it up to an external monitor, you'll see it's booting and running OSX just like any other Mac. It just can't display the video on the LCD.
     
  24. thread starter macrumors newbie

    Joined:
    Aug 7, 2007
    #24
    That's it. It is completely dead. FOr all I know the logic board could be OK.

    Does anyone know what the possible causes are for it just being dead. The battery and the power supply are fine. Is there a fuse? I doubt is it could be the switch. They rarely fail. I'm thinking it may be something simple... like a fuse?
     
  25. macrumors 6502a

    mick4394

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    Location:
    Flyover country
    #25
    The only other thing would be the DC in Board, but if it were that, the iBook would run on battery power.

    I think you may be out of luck. It really sounds like the logic board to me.
     

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