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My Macbook Pro Retina 15" early 2013, A1398 has no water damage and not been dropped. But the adapter had some non springy connector pins on the magsafe 2 head, with blackened outer two pins on the dc in connector. (I think outer two are ground, not power). Cleaned them up, found no metal debris in connector, magsafe head still hot and intermittent green and orange leds. Coconut battery showed good condition battery. Jiggled magsafe 2 connector, smelt some burning, and leds now both out. Battery not charging but ran from power adapter if SMC reset. Laptop then worked as normal until battery got to below 5% or so, then nothing would power up computer. Have got second spare working magsafe charger to check, but nothing can boot it up. Does this sound like only damaged magsafe dc in board, or logic board probs? The laptop was working fine before it wouldn’t boot up, but of course not charging battery. Does the dc in board have any fuses or protection circuitry? Looking at photos of it, there seem to be some components on the small PCB, and someone mentioned a burnt out P7 (?) transistor on the board. Any ideas? Thanks
First lets review the MagSafe adapter to see if it was the source of the problems you’re now facing: Apple Portables: Troubleshooting MagSafe adapters Using this Apple T/N do you see any damage to the computers connector contact face as well as the pins in the cord end? One of the problems I’ve had in the past a lot of is fake chargers damaging systems. Here’s a bit more: Counterfeit MacBook-Charger Teardown & Lacking safety features, cheap MacBook chargers create big sparks. As for fuses the logic board has a few but I don’t think thats going to help you. I’m suspecting the charging logic on the logic board has issues. You’ll need to find someone with the needed diagnostic skills and tools to fix your logic board. The DC In-Board is mostly passive as you can see here: MacBook Pro 15" Retina (Mid 2012-Early 2013) MagSafe 2 DC-In Board It mostly directs the power to the logic board. The one wire comm link between the charger & system does have some logic but it data not power. What can happen is a short in the MagSafe connector shorts out the power lines to the center pin (comm) which can burn these parts. Here’s the IFIXIT guide: MacBook Pro 15" Retina Display Early 2013 MagSafe DC-In Board Replacement
