6 Replies Latest reply: Feb 22, 2012 2:28 AM by bold_seagull
screamingman14 Level 1 Level 1 (0 points)
Hello,
I have an iBook G4 which I recently acquired,(2005 model, 1.42 GHz). Occasionally it will shut down, but only when running on battery power. The battery is new and is not drained when the computer dies. I can only get the computer to power up again by plugging it back in.

Even though this happens too infrequently for me to think it is a logic board issue, I have used the fix located here (http://coreyarnold.org/ibook/) to attempt to shim the chip. This doesn't work. Is it possible that I need a bigger shim or should I look in to reflowing the solder or replacing the logic board?

Help is appreciated, thanks!

iBook G3 (dual USB), iBook G4, Power Mac G4, eMac, Mac OS X (10.4.11)
  • 1. Re: iBoog G4 2005 random crash
    cornelius Level 6 Level 6 (17,825 points)
    If the computer starts up you do not have the corey arnold issue.

    The issue sounds like it might be either you battery, power supply or DC-in board. My guess, from your description, is that the battery is either a. although new, not good, or b. does not get fully charged by the power supply so it shuts down when on battery power only. If it is not getting charged it is because the battery cannot hold sufficient charge, or the DC-in board is not functioning well enough, or the power supply is faulty. Try a different power supply if you have access to one. See how that works. Download and install the widget iStat Pro and check on what it tells you about the battery.

    Good luck.

    cornelius
  • 2. Re: iBoog G4 2005 random crash
    screamingman14 Level 1 Level 1 (0 points)
    Thank you, I will look at that. One other issue I forgot to mention that keeps cropping up is that the computer clock resets whenever I start up the computer. I'm not sure if it is related to the random shutdown issue, but I'm not sure.
  • 3. Re: iBoog G4 2005 random crash
    cornelius Level 6 Level 6 (17,825 points)
    One other issue I forgot to mention that keeps cropping up is that the computer clock resets whenever I start up the computer. I'm not sure if it is related to the random shutdown issue

    The iBook, as opposed to other Apple laptops, has only the main battery and no PRAM battery. In other Mac laptops there is a PRAM battery which holds information like date and time in memory so when the computer shuts down all is not lost. Each time the iBook shuts down it loses all parameters.

    cornelius
  • 4. Re: iBoog G4 2005 random crash
    ojman873 Level 1 Level 1 (0 points)
    While you may be right about the backup battery, my iBook definitely doesn't lose track of time when it shuts down...
  • 5. Re: iBoog G4 2005 random crash
    cornelius Level 6 Level 6 (17,825 points)
    ojman873:

    Welcome to Apple Discussions.
    While you may be right about the backup battery, my iBook definitely doesn't lose track of time when it shuts down...

    If it shuts down with no battery and not connected to household electricity there is nothing to maintain items in the PRAM. If the battery is still connected, although not sufficient to keep the computer going, there may be enough juice to maintain the PRAM. If yours maintains the time and other items in the PRAM without a battery and disconnected from the wall outlet, I'd like to hear more about it.

    cornelius
  • 6. Re: iBoog G4 2005 random crash
    bold_seagull Level 1 Level 1 (30 points)

    So how did you get on? I was in the process of buying an iBook G4 where the seller has mentioned a random shutting down issue where the date gets reset, and they said they had purchased a new battery 8 months ago.

     

    It comes with all the original box, install disks etc. and if I got it cheap enough, maybe worth the risk it means replacing a part such as the DC module.

     

    I'm looking at buying it for my kids, and at under £75, ($90) could be worth it, although I'm nervous having read a fair few problems related to logic boards and resoldering of chips etc.