Chosen Solution
Hi guys, So I picked up a cheap MacBook Air 2014 (820-3435-B) which had a puff of smoke out of the back when being used. Apple store said to the guy it was “a blown transistor”. I opened it up and could see one of the capacitors was damaged (C7140) and crumbling. I replaced it which was a feat for me! Plugged in and it turned on, there isn’t an SSD so I got a flashing folder which I was really happy with! However, I’ve now realised it doesn’t boot on battery power. Where do I go from here? I checked R7006 which was fine from what I could tell. I am installing Catalina tomorrow so I will be able to tell if the battery is recognised and if charge is shown. Feeling deflated after what I thought was a great success! EDIT Entered the following in Terminal “pmset -g batt” Now drawing from ‘AC Power’ -InternalBattery-0 (id=11337827) 0%; AC attached; not charging (Poor/Good) failure: “Permanent Battery Failure” Detailed failures: “Externally Indicated Failure” present: true EDIT 2 - Ran CoconutBattery
EDIT 3 It was indeed the battery, bought a used one on eBay and it works perfectly
The charging logic on the main logic board has failed. The puff of smoke was likely one of the MOSFET’s burning. You’ll need to inspect your logic board for damage or spillage.
