Macbook A1398 Only boots when FN key is held + more

Question

Level 1

4 points

Macbook A1398 Only boots when FN key is held + more

I have a macbook A1398, It will boot then shut down within 30 secs. Unless I hold the FN key down while I boot and keep it held down. As long as

the FN key is held down the laptop functions normal. If I let it go, then a box appears "are you sure you want to shut down" and it shuts off.

On a secondary note: The charger doesnt stopped lighting up. On further inspection the battery pack was bulging. So a replacement pack was purchased and installed on the recommendation from the apple store. The Charger still doesnt light up green or amber or any color.

Even with the replacement battery the machine still behaves the same.

Any thoughts or suggestions would be greatly appreciated!

MacBook Pro, OS X Yosemite (10.10.5), A1398

Posted on May 2, 2016 4:57 PM

Reply

Answer 1

jeffd55

Community Specialist

May 3, 2016 2:54 PM in response to Emaluzer

Hello Emaluzer,

Thank you for using Apple Support Communities.

I see that your MacBook is not booting properly. The following article provides some basic troubleshooting for your Mac.

If your Mac won‘t turn on

Best regards.

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Answer 2

Emaluzer Author

Level 1

4 points

May 3, 2016 3:03 PM in response to jeffd55

Sorry Jeffd55, maybe I didnt explain it right.

The Macbook does power on. it will shut itself off after about 30sec-1minute from when it starts.

If I hold the FN key down it will power up and not shut down as long as I hold the FN key down. as soon as I let it go, the Macbook shuts off.

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Answer 3

jeffd55

Community Specialist

May 5, 2016 3:00 PM in response to Emaluzer

Hi Emaluzer,

If your computer is unexpectedly shutting down, then this article should be more appropriate to your issue:

OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem."

Cheers

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Answer 4

Emaluzer Author

Level 1

4 points

May 6, 2016 1:41 PM in response to jeffd55

As it turns out there is an issue with the keyboard, or the motherboard. I took it apart and unplugged the keyboard from the motherboard and it works perfect (except keyboard doesnt) if I plug it back in then it continues to shut down.

I ordered a replacement keyboard and will update if that fixes it or if I need to get a new logic board.

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