Mac will not start even after installing new battery
Few days ago I have noticed that Mac Safe Adapter stopped charging my mac. There was no red light on the plug. I know the battery was in bad condition ( very old ) . The batter drained completely. My first idea was to replace the batter. So I purchased new battery and just replaced it. I was hope the Mac will start, but did not. And The Mas safe adapter stil is not working ( no light when plugged ) . The adapter is ok, as I can use it for another Mac. The one I am using right now :) What may have happened to my Mac ?
MacBook Pro 15″, macOS 11.6