MacBook Pro turns off when disconnected... Battery is new.

Discussion in 'MacBook Pro' started by jbuilder, May 29, 2014.

  1. jbuilder macrumors newbie

    Apr 23, 2010
    Mesquite Texas
    Hello everyone,
    I went thru the stickies and forum but couldn't find a thread similar to mine. I have a MBP A1211 Intel Duo and has a issue where the computer only runs while it's plugged in to the wall. When I disconnect it, it turns off completely. I originally thought it was a bad battery so I replaced the battery, with more than just one good working battery and it still has this issue.
    Has anyone had this problem.
  2. heartm00d macrumors newbie

    May 27, 2011
    This worked for me

    MacBook 2009 symptoms:
    MacBook switches off with no warning when the power adapter was removed.
    MacBook switches off with no warning when booting up with power adapter removed.
    After dealing with the problem for almost two years and searching the internet from time to time for several days I still found no solution.
    Tried resetting SMC, PRAM, and many things more…

    coconutBattery showed my battery in good health, now running fine for about an hour without shutting down, no power adapter connected.

    Load Cycles: 84 (I almost never used the MacBook without power adapter and thought it could be the reason for the shutdowns, I never calibrated the battery)

    Battery Status : Good

    My solution found by accident today fiddling around with the Energy Saver Preferences Pane/Battery settings. I don't know, if all the changes I made are necessary, or just one changed setting. What I did:
    1. Set Computer sleep to "Never"
    2. Set Display sleep to "Never" (ignoring the warning for shorter display life)
    3. Unchecked "Put hard disk to sleep when possible"
    4. Unchecked "Slightly dim the display while on battery power"


    Maybe someone tries all changes separately and finds the real culprit…

Share This Page