Macbook Air w/ Charging issues.
My Macbook Air (2018) instantly Shuts Down when the magsafe power adapter is connected. At first, it was blinking green and I reset PRAM and the SMC. No fix. Then, I disconnected and reconnected the battery. The charger works now (orange). However, there's a noticeable high pitch whine when it is being charged. Additionally, The computer shuts down whenever the magsafe is plugged in. Should I buy a new Magsafe adapter? I'm concerned it won't fix the problem. All these charging problems occured after the new OS update.
MacBook Air 13", macOS 10.14