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  1. #1
    latest macbook problem
    brendan67's Avatar
    Member Since
    Jan 24, 2005
    Posts
    691
    Specs:
    Macbook Pro 2.26 4GBRAM iPhone6
    latest macbook problem
    hi

    new hard drive just fitted after crash, now the macbook shuts down
    as soon as it reaches reserve battery power.

    don't tell me its going back to apple, anyone got any suggestions of how
    to solve this?

    regards

  2. #2
    latest macbook problem
    dekan's Avatar
    Member Since
    Mar 16, 2007
    Posts
    756
    hm.. maybe the power management is a bit messed up? what setting do you use?

    also: you can go to: /Library/Preferences/SystemConfiguration and delete the PowerManagement.plist
    it will be created again once you change settings for your power management

    hope that helps

  3. #3
    latest macbook problem
    cwa107's Avatar
    Member Since
    Dec 20, 2006
    Location
    Lake Mary, Florida
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    26,758
    Specs:
    15" MBP, Core i7/2GHz, 8GB RAM, 480GB Crucial M500 SSD
    Once it gets to reserve power, the power management system will determine when there is not enough power to continue to use the system in a stable manner and forcibly sleep the system. This is completely normal behavior. If you'd like to reset the power management system, reset your PRAM by powering the system off, power it back on and press and hold Command-Option-P-R. Wait for the system to chime 3 times and then release.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

  4. #4
    latest macbook problem
    brendan67's Avatar
    Member Since
    Jan 24, 2005
    Posts
    691
    Specs:
    Macbook Pro 2.26 4GBRAM iPhone6
    macbook
    hi guys

    thanks yes i'll try all you suggest

    cwa107

    can't be normal to shut down completely - just because
    you are in reserve power - surely

    i lost stuff i was writing at the time and it did not behave this way before?

    regards

  5. #5
    latest macbook problem
    Zoolook's Avatar
    Member Since
    Sep 24, 2006
    Location
    Brooklyn, New York
    Posts
    2,756
    Specs:
    15" MacBook Pro, i7 2.66Ghz, 8GB RAM, 512GB SSD; iPad 3, iPhone 5
    Quote Originally Posted by cwa107 View Post
    Once it gets to reserve power, the power management system will determine when there is not enough power to continue to use the system in a stable manner and forcibly sleep the system. This is completely normal behavior. If you'd like to reset the power management system, reset your PRAM by powering the system off, power it back on and press and hold Command-Option-P-R. Wait for the system to chime 3 times and then release.
    I see a few people recommending this, but they're all wrong because it's not how you reset the PMU. PRAM has nothing to do with power management.

    PRAM contains these:

    Status of AppleTalk
    Serial Port Configuration and Port definition
    Alarm clock setting
    Application font
    Serial printer location
    Autokey rate
    Autokey delay
    Speaker volume
    Attention (beep) sound
    Double-click time
    Caret blink time (insertion point rate)
    Mouse scaling (mouse speed)
    Startup disk
    Menu blink count
    Monitor depth
    32-bit addressing
    Virtual memory
    RAM disk
    Disk cache

    No mention of power management there...!

    PMU is reset like this:

    MacBook, MacBook Pro

    If the computer is on, turn it off.
    - Disconnect the AC Adapter and remove the computer's battery.
    - Press and hold down the power button for 5 seconds and then release the button.
    - Reconnect the battery and AC Adapter.
    - Press the Power button to restart the computer.

    Now if the power management unit really is messed up, after doing this, you'll see that the amount of power remaining has possibly changed.
    In the land of the blind, the one-eyed man is stoned to death.
    - Joan D. Vinge


  6. #6
    latest macbook problem
    cwa107's Avatar
    Member Since
    Dec 20, 2006
    Location
    Lake Mary, Florida
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    Specs:
    15" MBP, Core i7/2GHz, 8GB RAM, 480GB Crucial M500 SSD
    Quote Originally Posted by Zoolook View Post
    I see a few people recommending this, but they're all wrong because it's not how you reset the PMU. PRAM has nothing to do with power management.
    Noted. Thanks.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

  7. #7
    latest macbook problem
    cwa107's Avatar
    Member Since
    Dec 20, 2006
    Location
    Lake Mary, Florida
    Posts
    26,758
    Specs:
    15" MBP, Core i7/2GHz, 8GB RAM, 480GB Crucial M500 SSD
    Quote Originally Posted by brendan67 View Post
    hi guys

    thanks yes i'll try all you suggest

    cwa107

    can't be normal to shut down completely - just because
    you are in reserve power - surely

    i lost stuff i was writing at the time and it did not behave this way before?

    regards
    You are correct, it should not just shut down - but it will sleep if there is not enough power to reliably sustain the machine.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

  8. #8
    latest macbook problem
    brendan67's Avatar
    Member Since
    Jan 24, 2005
    Posts
    691
    Specs:
    Macbook Pro 2.26 4GBRAM iPhone6
    macbook
    hi

    well, i've reset the pmu, and problem has gone!

    thanks guys

    regards

  9. #9
    latest macbook problem
    Zoolook's Avatar
    Member Since
    Sep 24, 2006
    Location
    Brooklyn, New York
    Posts
    2,756
    Specs:
    15" MacBook Pro, i7 2.66Ghz, 8GB RAM, 512GB SSD; iPad 3, iPhone 5
    Quote Originally Posted by brendan67 View Post
    hi

    well, i've reset the pmu, and problem has gone!

    thanks guys

    regards
    You're welcome, it's nice to know when advice was useful.
    In the land of the blind, the one-eyed man is stoned to death.
    - Joan D. Vinge


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