Stumped: Late 2007 MacBook won't run on battery power.

Discussion in 'MacBook' started by skateny, Jul 26, 2013.

  1. skateny macrumors 6502


    Jul 19, 2012
    New York, NY

    I'm not new to OS X, but I am new to MacBooks.

    I've recently been using the MacBook in the title:

    Model Name: MacBook
    Model Identifier: MacBook3,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 4 MB
    Memory: 1 GB
    Bus Speed: 800 MHz
    OS: Snow Leopard, 10.6.8

    It's been lightly used over the years, and never had a problem. Yesterday, the Mac immediately shut down after I removed the AC adapter. Each time I tested this, I got the same result. I ran Disk Utility, and everything is reported as fine. The battery is recognized and reported as fully charged in both the menu bar and System Profiler.

    I've rarely used the MB with battery power, and the battery is in good shape. I was working on it about a week ago for about two hours with the battery alone. It had plenty of power left when I plugged in the AC. I don't have a spare battery to test.

    All help will be greatly appreciated.
  2. rabidz7 macrumors 65816


    Jun 24, 2012
    Does it work when booted direct from battery.
  3. minifridge1138 macrumors 6502a

    Jun 26, 2010
    It sounds like your battery is dead.

    What are the stats on your battery? Number of cycles, health, etc...
  4. skateny thread starter macrumors 6502


    Jul 19, 2012
    New York, NY

    Both System Profiler and CoconutBattery report the battery is healthy with a coupla hundred cycles left.

    After resetting PMU and SMC, other things happened -- including unwarranted and unnecessary fan operation -- that indicate a dead/defective PRAM battery.

    I picked one up at for $1.30 plus shipping.

Share This Page