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My macbook pro stopped charging. whilst I had battery remaining it would still boot and worked fine, suggesting there was no battery issue. I swapped out the magsafe module and upon connecting the power the charging light came on, the mac power up “chord” sounded…….and then nothing. The power light went out and the mac is still dead. the only other work I’ve had to perform prior to this was a dead HDD a couple of moths ago, and after I’d replaced that there were no indications of any other problems prior to this.
I think you’ll need to review your MagSafe charger as its likely bad. Over time the cord connector can wear out and the cords do breakdown as well. All it takes is the middle pin to short out with the power feed pins which are right next to it or within the cord. Review this Apple T/N Apple Portables: Troubleshooting MagSafe adapters Update (10/02/2018) Well we need a working battery to move forward here. You have a 50/50% chance just needing a new battery or the charging logic on the logic board needs repairs. It’s even possible you need both! Here’s the IFIXIT guide to replace the battery MacBook Pro 13" Unibody Mid 2012 Battery Replacement depending on where you live you can get the IFIXIT battery MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery Check the shipping info. Once you have the new battery don’t plug in the charger! We need to install this app CoconutBattery and take a snapshot of the main window and paste it here for us to see Adding images to an existing question. Then plug in your healthy charger to let the battery charge but we also need one more snapshot with the charger plugged in so we can compare with the first snapshot. The MagSafe cord LED should be Amber until the battery is charged then it will turn Green. If not pull the adapter off and inspect the connectors.
