Macbook powers up when the magsafe connector is plugged

Hello all,
Last month, I've had the battery problem that makes the battery not detectable by the macbook, and gives me an X in the menubar.
While I was waiting for my new battery, the machine begun to power up when I plugged the magsafe connector without pressing the power button. I thought the problems were related.
Well now I've changed the battery and it's working alright again, but the power up issue is still bothering me.
Can anyone help me out?
Thank you.

Hi!
See my post, had the same problem:
http://discussions.apple.com/message.jspa?messageID=4484223#4484223
I did the following:
- Reset the System Management Controller (Turn off computer, remove power cord and battery, hold down power button for 5 seconds, reconnect battery and power cord)
- Reset the PRAM (Hold CommandOption+'P''R' while booting until you hear the second startup chime)
- Move the pins of the MagSafe connector with the plastic cap of a pen (maybe one of them was stuck in a wrong position and didn't make the correct connection when plugged)
Ciao
Sergio

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