Chosen Solution
I bought a new battery for my Macbook Air and I have already changed it. It came 50% charged and it was working fine but the thing is I could not charge the new battery and every time I tried and plugged / connected my MBA with charger there came no light (green or yellow) and the screen went black and slowly the new battery came empty. Every time then I disconnected the MBA again from the charger it went to normal! I have tried many things, disconnecting the new battery and cleaning some things but nothing worked. Du you have a solution or any idea what might be going on? Hopefully you understand my problem! :-)
If the MagSafe charger LED is not lighting up and you are sure you have a good charger, that leaves only two parts the I/O board and the main logic board. I would first make sure you have a good charger first make sure you have a REAL Apple unit! Apple 45W MagSafe Power Adapter for MacBook Air Using a knockoff can damage the MagSafe port and your logic board! Here’s an example of damage from a knockoff
● Don’t Replace Your MacBook Charger With a Cheap Knockoff ● OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth ● Lacking safety features, cheap MacBook chargers create big sparks ● FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger Here’s a good write up on checking your MagSafe charger and the connectors: Apple Portables: Troubleshooting MagSafe adapters Here is the needed part if the MAgSafe connection is worn MacBook Air 13" (Mid 2013-2017) I/O Board and here’s the guide MacBook Air 13" Early 2014 I/O Board Replacement I would still recommend you run CoconutBattery once you get the system to run and post it here so we can check your charging logic and battery.
