MacBook is notorious for power issues
My son's computer was fine except for the power. I was so happy that I didn't need to spend more than $30 to fix it.
It took a while and a lot of patience. The screws were hard to unscrew without stripping them. Otherwise, it was fine and I was proud of myself.
If you have tiny screwdrivers and a tiny allen wrench (hex), you don't need any other tools.- so grateful.