NO any 19 V power ,any power circuit drawing? which should I change?

I do not have any 19 V power in logic board, can any one let me know how to root cause the power circuit?

can any one provide me power circuit drawing?

Thanks

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0