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I have a Macbook Pro (early 2011) I spilled coffee on the keyboard. Shortly after, the battery would not recharge and then eventually all power was lost. I cleaned logic board, performed a prm reset, etc..That didn't work....so I replaced the battery that I got from another vendor...that didn't work..I returned the battery with full refund.
Then I went to the IFIXIT website and read some trouble shooting posts from other members. Replacing the MagSafe circuit board was, I found, the next step to take...So I ordered the tools along with the MagSafe board....Received it in mail in 3 days. I watched the IFIXIT video on how to install this part and it was very thorough (especially the heads-up warning on when to be very careful on some steps). Installed it with my original battery and hooked the MagSafe up.....turned the power and VOILA... it powered up with orange light showing on Magsafe and recharged the battery giving way to green light on Magsafe....All systems GO!!!! Thank You IFIXIT
If you have any problems with your Mac, keep it simple and go to the IFIXIT first...it's a powerful and in-depth resource.
TR6 Torx Security Screwdriver
MacBook Pro Unibody 13" and 15" MagSafe DC-In Board