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the problem is green or Amper LED is not ON. I traced center sense pin a resistor is missing between the center sense pin and the 5th EXT pin of MAX9940 ic, any one can help to find the value of resistor in DC in board
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crwdns2934065:0crwdne2934065:0: 309
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Hey Mate!
For this; I'd suggest you don't solder and just buy yourself a new magsafe port; they aren't expensive. It's a pretty straightforward repair as well.
Here's one off ebay:
820-2565-A Apple MacBook A1278 A1286 A1297 Magsafe DC-IN Power Jack Board Cable- Australia
Cheers,
Falcon
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crwdns2936753:030crwdne2936753:0 18
crwdns2942667:0crwdne2942667:0 90
Can you narrow down which one of the A1278 you have. Take a look at this listing A1278 systems
crwdns2934271:0crwdnd2934271:0 DanJ crwdne2934271:0
Apple MacBook Pro "Core i5" 2.5 13" Mid-2012, main board number 820-3115-B.
crwdns2934271:0crwdnd2934271:0 Arshad Ahamed crwdne2934271:0
Here's the iFixit part MacBook Pro Unibody 13" and 15" MagSafe DC-In Board
crwdns2934271:0crwdnd2934271:0 DanJ crwdne2934271:0