powerbook 1400 problems

Discussion in 'Apple Collectors' started by apple tech geek, Nov 11, 2016.

  1. apple tech geek, Nov 11, 2016
    Last edited: Nov 11, 2016

    apple tech geek macrumors member

    apple tech geek

    Joined:
    Oct 20, 2016
    #1
    just got one of my new powerbook 1400c
    but 3 problems
    1 the pram it looks like 2 button cells they only hold a small charge but it doesnt hold time can i just use 2 regular button cells or not?
    2 flat battery they use ni hm how can i rebuilt it ? it has 4 long cells
    3 track pad does wierd things like gets stuck/twitcing mouse pointer any idea how to fix it? i took it apart today to check all parts but no problems seen
    here details about batt cell
    sanyo ni-mh twicell model 8hr 4 /3au 9.6v3500mah akh
    i wana rebuilt it with ni mh or with a alternative source
    thx for helping atleast
     
  2. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #2
    The PRAM battery is rechargeable by the laptop itself - it will need to be on charge for about 24 hours and only holds date and time for a short time (according to Apple "a few minutes").

    It cannot be replaced by anything else other than a rechargeable Lithium - don't try any other type.

    According to Apple it's a 50mA/h 3V rechargeable Lithium pack - that makes it 1.5V 50ma/H per cell.

    As for the main battery, you should try to find the original Sanyo cells. Which would be a "HR-4/3AU" @ 3500maH x 8 Cells - expensive, but worth it. If you can't find them, then an exact replacement with the same physical size and electrical ratings should work. Original size is 17mm diameter and 67.5mm height including solder tags.

    You must take care to replace the batteries in the exact way they are originally connected and solder tag types should be a little easier to work with.
     
  3. MikeatOSX macrumors regular

    MikeatOSX

    Joined:
    Mar 26, 2007
    Location:
    Austria
    #3
    I've written a PowerBook PRAM battery replacement guide, it's in German and I didn't have the time yet to translate it into English.
    But on the pictures and in the text you can see, which replacement PRAM batteries should be used.
    For replacing the PB 1400 PRAM batteries, you have to disassemble the whole PowerBook 1400 (not the display). One guy claims he did it with a pair of tweezers without disassembling....
    BTW: PowerBooks 1400c/166 are fitted with two pairs of PRAM batteries, other 1400 have one pair.
    https://www.mediafire.com/download/95msic89udzjigd
     
  4. apple tech geek thread starter macrumors member

    apple tech geek

    Joined:
    Oct 20, 2016
    #4
    Is there anyway to mod the batt so it keeps time and dat but cant run the laptop? I hate resetting it
    Plus every time it has bern of power the moment i plug it in it turns on by it self and the brightness is by 0
    --- Post Merged, Nov 12, 2016 ---
    My powerbook doesnt boot after a night of sleep and charging it waked up from sleep fine but when i unplug and Replug the power and nothing happens the green led shows realy faint when batt and charger is unplugged and goes darker when i pres powerbutton
     
  5. CooperBox macrumors 6502a

    CooperBox

    Joined:
    Nov 28, 2010
    Location:
    France - between Ricard & Absinthe
    #5
    Excellent guide, which I've downloaded/saved for future reference. I now have a few oldish Powerbooks that will benefit from this. Thank you!
     
  6. MacTech68, Nov 12, 2016
    Last edited: Nov 12, 2016

    MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #6
    You'll need to reset the power manager.

    See:
    https://support.apple.com/en-us/HT1781#faq7

    EDIT: as for the trackpad, use something like window cleaner on a soft cloth to clean the trackpad. Ensure your fingers/hands don't have greases or oils on them.
     
  7. apple tech geek thread starter macrumors member

    apple tech geek

    Joined:
    Oct 20, 2016
    #7
    Do i need reset everytime ?
     
  8. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #8
    Only if the Power Manager gets corrupted, which may not happen all the time.
     
  9. apple tech geek thread starter macrumors member

    apple tech geek

    Joined:
    Oct 20, 2016
    #9

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