Model A1297 / 2.66, 2.8, 2.93, or 3.06 GHz Core 2 Duo processor

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Periodic Shut Down/Not Turning On Troubleshooting

2009 Macbook Pro A1297 Emc 2329 2.8Ghz

Hello I'm working on this Macbook and since I'm a PC Guy I joined this community to learn more.

The Macbook is a A1297 EMC: 2329 2.8Ghz model running OS X 10.7.5. It came in because it would periodically turn itself off, and eventually would no longer turn on. As far as I know this Macbook has no other known issues. When I pressed the power button nothing happened; no fans, no HDD spin-up, no LED's, nothing. This happened whether the Macbook was plugged in or not. I pressed the battery indicator button and it showed it to be at 7/8 charge.

First thing I did was look up the specs to accurately troubleshoot. I then removed the back and tried to power on the Macbook by the two silver jumper pins on the logic board to no avail. When this did not work, I disconnected the battery and charger, pressed and held the power button for 10 seconds, reconnected the battery and pressed the power button. Boom, the Macbook began to power on, however; during the grey load screen it shut itself off again. I plugged in the charger, pressed the power button once more and it turned on and remained on. I have now unplugged the charger and continue to use it and it has not yet shut off.

To further troubleshoot this I turned it off and attempted to turn it back on with the charger out (battery now indicated to be at 6/8) and it does not turn on. It tries to spin-up but it then cuts off before the screen ever illuminates. I plugged it in and attempted to turn it on and it came right on.

EDIT: After reattaching the back panel I attempted to power on the macbook with the charger plugged in and it turned on, began to boot, gave me the signature apple chime and then shut off. It did this twice, before I got it to come on and stay on.

What does everyone believe to be the problem? I am leaning towards a bad battery even though it seems to be holding a charge, or perhaps something wrong with the logic board?

Answered! View the answer I have this problem too

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Check your RAM, make sure that your modules are okay. Not that I doubt your abilities, but which "by the two silver jumper pins on the logic board" did you use? add an image of your board with your question.

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Hello, Did you solve this?

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@Lowedown11 - Maybe it would be better to create your own question with your details as this is a very old post I'm not sure if Timithy will respond. Besides your issue maybe different :-)

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Deck the Halls
With tools and Fix Kits

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Chosen Solution

To test things better I would download this little gem coconutBattery, See what it tells you.

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Thanks for that! I will try it, but unfortunately I believe the problem to be the mainboard because I have disconnected the battery and booted up the macbook and the problem persists. I will press the power button and it tries to boot up, but then dies. Try once more and it will get a little further then die. It usually boots on the third or forth try with or without the batter connected and with or without the charger.

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