[dkindernay]

So, specs: white Macbook core2 duo. 2.2ghz

problem: Computer seemed to just die. no spills,drops etc. will not power up through the power button. I removed the top case and jump started it from the soder points on the board and it worked fine. plugged the keyboard back in and it also worked fine. I put it in hibernation to see if pressing the power button would wake it up and that slso worked fine. now when i completely put it back together again i still get no dice. it will not power up. any ideas what the problem could be? please help

Thanks!

[dkindernay]

anyone?

[P]

At a guess, your power supply is not distributing any power to the +5VSB rail, the only one to be active when the computer is off. With out that, the computer cannot start up. When in sleep (ACPI S3, Suspend To RAM, what Windows calls Standby and OS X calls Sleep) there is other power on to the motherboard, and so you can start. What Windows calls Hibernate is something else (ACPI S4) that you cannot reach in OS X except by having the machine sleep and then letting the battery run down.

In any case, I think you need to bring the machine in for service or, if you're as comfortable with picking it apart as you seem to be, do some more detailed troubleshooting by opening it up and looking for leaking caps.

[Waragainstsleep]

Good luck finding leaking caps on a MacBook board. Aren't SMT ones mostly solid state anyway?

Does it make any difference running off just the battery? Or without the battery installed? If you remove the top case but leave it connected, does the power button work then? Inspect the solder joints on the top case ribbon cable connector and its other half on the logic board to see if anything is coming loose.
Sounds like a weird top case fault to me.

[shifuimam]

Reset the SMC. The SMC is a set of instructions that tell the computer how to handle power. It's possible that the SMC data has gotten corrupt, which is why you're having such a hard time getting the computer to power on normally.