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Power button didn't work at first, now the MacBook shuts down

Hello,

2 weeks ago the power button on my laptop died. I turned it on with the power pads and it worked great as usual for 2 weeks.

Yesterday i returned home to find it shutdown and not able to start from the power pads. I got the chime and the screen with the apple logo and the rotating wheel underneath but it shutdown afterwards.

I cleared the ram, tried to boot from cd and recovery disk and it stayed with me until the installation step.

When i booted pressing T it got to the login screen but shut after i typed my password.

I am sure that there HASN'T been any liquid damage to my laptop and i don't understand why all these problem suddenly occurred.

Only solution i haven't tried yet is single user mode with fsck -fy.

I am curious why it could be a logicboard problem as it worked great as usual before. Could it be related to the small round battery on the logicboard next to the rams?

This site has been very helpful so far, thanks.

Answered! View the answer I have this problem too

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At that age it could be the battery - though generally that doesn't prevent a boot - just loses all the personal preferences (date, time, screen res. etc).

Logic board jump starting is not a fix - it's a diagnostic step. It is possible to damage the machine by force starting it. You could have moisture corrosion without an actual spill by working in a high humidity environment.

The command line really is just a HFS volume check - to detect directory/file errors... this is a software not hardware fix, in other words what fsck -fy does is not a reason for a button push to fail - but HFS errors could be why the boot & install failed.

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So i should check the battery first.

It seems that because of my laptops age the service guys will take the easy road of "logic board failure", any other advice i should follow?

If nothing happens and i get the answer i am referring to, i think about baking my logicboard.

Anyone with the same issues tried it and succeeded?

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George will be eternally grateful.
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