crwdns2934241:0crwdne2934241:0 Rany
crwdns2934249:0crwdne2934249:0:
Since you are set on learning, first step is isolation. Connect a known good battery and test again. Try with a known good keyboard/top case too. Then you can assume it is the board and start trouble shooting the charging circuit. And if you give up at any time and Apple can tell you went inside, they'll void your warranty. Good luck.
crwdns2915684:0crwdne2915684:0:
open