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I need to know how to correctly install the PRAM battery Imac

I replaced the PRAM battery on my Imac and it hasn't worked since. It will boot from a CD but not from the hardrive. I've reinstalled the OS but that didn't help.I booted in single user mode and it said it can't load a particular driver. I tried again and it had a kernel panic.It will still boot from a n Install Cd but not from the hardrive.

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  • Steve Caulfield Jul 14, 2010

    Does anyone know how to correctly install a PRAM battery on the motherboard? That's all i need to know-I have already been thru everything else (resetting PRAM,reinstalling the OS,and single user boot.

  • Steve Caulfield Jul 15, 2010

    Yes- if it doesn't I most likely have the battery in backwards.

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  • Apple Master
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ARE U SURE U INSTALLED THE BATTERY CORRECTLY?

Posted on Jul 14, 2010

  • Steve Caulfield Jul 15, 2010

    That's what I'm trying to find out-I'm not sure-or I wouldn't have asked the #$%^& question!

  • yadayada
    yadayada Jul 15, 2010

    I assume u switched the polarity of the battery, each side or terminal is marked with a plus or minus, just reverse the polarity of the battery and see if the system comes up

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  • Master
  • 1,561 Answers

Hello,

I advice you follow the below procedure,

  1. Shut down the computer.
  2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
  3. Turn on the computer.
  4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
  6. Release the keys. This should fix the problem and correct all the abnormalities.
Take care.

Posted on Jul 14, 2010

  • 2 more comments 
  • Steve Caulfield Jul 14, 2010

    I have already done that and it doen't work.

  • Steve Caulfield Jul 14, 2010

    I have alread tried all the solutions except getting a restore disc for Tiger 4.

  • Sulaimon Jimoh Olayemi Jul 15, 2010

    Hello,

    Is this the procedure you followed while replacing the PRAM on your imac?

    Changing out a battery is not
    difficult on most Mac systems. Simply pry off the retainer and pull the
    battery out. Reverse the procedure with the new battery making sure the +
    is positioned correctly.

    Restart your system and reset the date
    and time and other control panel settings as needed.

    Note for the
    4.5V Batteries, they are small square and black. They are stuck down
    with velcro. Simply pull up the old battery and unhook the cable.
    Reverse the procedure. There is only one way the cable plugs back in.

    Once
    you've replaced the battery, you will want to reset several settings.
    If you're on a network, you'll want to open the Chooser and enable
    AppleTalk. Note some Macs may not support all these control panels
    (preferences in OSX). These are the control panels you'll need to use:

    Startup
    Disk. Always reset your startup disk. Your system may not boot well or
    give you the flashing question mark if it gets confused.

    Date
    & Time. First, choose your time zone, then set the date and time.
    Memory - Mac OS 8.5 and later will usually set this automatically. Set
    your cache to a Meg if you have plenty and 1 meg over on virtual.

    Network
    or AppleTalk. If you're on a network that isn't LocalTalk, you will
    need to reset your network connection on any Mac with a LocalTalk port.
    Mouse and Keyboard.

    You'll need to reset the mouse tracking and
    double-click speeds, as well as setting the keyboard delay and repeat.

    Energy
    Saver or Auto On/Off. Energy saving settings, power-up time, etc. are
    stored in PRAM and need to be reset.

    Monitors and Sound or
    Monitors & Sound. You need to reset speaker volume and monitor
    bit-depth and possibly resolution.

    Take care.


  • Steve Caulfield Jul 15, 2010

    The problem is that I didn't pay attention to the polarity of the battery when I took it out and I don't know if I put it back in correctly. This is a 3.6 volt lithium battery but it is not a coin battery. It is a 1/2 AA battery which is shaped like an AA battery. I can find manuals for Intel based G3 400 DV imacs but this imac is IBM based and is different in construction.. The motherboard has a + sign on it near the battery but I don't know if it relates to the battery's polarity.

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