Location of CMOS / BIOS battery for iBook G4 14"

Discussion in 'PowerPC Macs' started by zootman55, Mar 25, 2008.

  1. zootman55 macrumors newbie

    Mar 14, 2008
    Can anyone pinpoint the location of the CMOS / BIOS battery on a G4 iBook 14"? I have viewed the disassembly instructions on ifixit.com. They don't reference it. Thanks
  2. dvd macrumors regular


    Oct 12, 2007
    There is no CMOS battery for the iBook G4. Just a capacitor to keep the PRAM juiced during battery swaps.

    See here
  3. krye macrumors 68000


    Aug 21, 2007
    There's no battery for that. Why the concern? Are you loosing your settings or something?
  4. zootman55 thread starter macrumors newbie

    Mar 14, 2008
    I'm surprised! No CMOS battery???

    Thanks for the quick replies. Yes.... the iBook is losing Date/Time settings intermittently when the battery is removed, even with the A/C attached. I will pay more attention to see how it behaves during battery removal.

    It also freezes after about 40 to 60 minutes of light use.... surfing, watching a DVD, etc. I have not seen any funky video artifacts to hint of a graphics chip issue prior to freezing..... just works fine and then it hangs without warning. The system does not seem hot either. I've cloned the HD to a larger/newer model, I've added RAM (was only 256MB so I popped a 1GB SODIMM in ), I've done the basic HD verify/repair, I've reset the PMU, NVRAM & PRAM. I plan on a complete disassembly, re-applying thermal paste to CPU & reseating the heatsink/fan, unless there is a less labor intensive fix to try. Thanks
  5. Farkum macrumors newbie

    Jan 15, 2008
    If I turn off my G4 laptop when it turn it back on it will reset all date and time information. If I were on my pc I would immediately assume cmos battery but it sounds like there isn't one. Anyone know if the capacitor could be bad?

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