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Hi
I have a white macbook unibody, which appears a shutdown message constant, as if you pressed the button on and off.
Sometimes I do not draw, only goes .. restart, sometimes goes to the middle and off.
I think is that the power button, lagoon suggestion?
As I can change the button?
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If you want to know if your A1342 top case (power button) is faulty you have to start up the machine without the top case connected. To do this:
1- remove the macbook bottom cover (8 philips screws)
2- disconnect the top case ribbon cable from the logic board (check the ifixit repair manual for the Macbook white uniboy A1342 to locate the connector but it's really easy to find)
3- locate the 2 power pads on the logic board, they are near over the top case connector: look at ABCellars pict to locate the power pads:
Minimum components needed to power on?
4- with the ac adapter connected to the machine trigger the 2 power pads with a small flat metallic screwdriver.
5- the macbook should start up and boot the system
6- (optional) if you have access to an external USB keyboard and a mouse connect them to the machine before starting the machine.
7- if the macbook works as it should then the top case is faulty.
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I followed the instructions as you said, and the equipment is working properly, thank you very much.
It has component-level solution? or I have to buy the top case?
I'm glad that your logic board is OK. Your conclusion of a bad power switch seems to be accurate but there's no way to replace it without replacing the whole top case. iFixit offers the top case $149.95.
MacBook Unibody (A1342) Upper Case
You can also go the ebay route by checking this link:
http://www.ebay.com/sch/i.html?_from=R40...
Good luck (-:
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Try booting up from your system installation disk, "C" key. See if the problem persists. If not, go to Disk Utilities and see if you can repair the hard drive.
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