Chosen Solution
I have recently replaced the keyboard on family member’s MacBook Air. This is not the first time I’ve done this, but this is the first time the computer suddenly stopped charging. I already tried two different chargers and made sure everything was plugged in tightly. Nothing seems to be obviously broken and after some tinkering I was able to get it to turn on, but the fan was at 100% speed and the computer only worked with the charger plugged in. Could this be an issue with the battery? This has never happened before nor did any situation similar to this happen. What should it do? Update: After unplugging the battery the mac starts up as usual.
try PRAM SMC reset here
Give this a try, disconnect the battery, with nothing connected press and hold the power button a good 15 sec to fully drain the logic board of its charge. I would also install this gem os an app to monitor your battery CoconutBattery Post a snapshot of the main screen here so we can see things too
