crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

Not sure why you jumped to the logic board as you still have the connection pathway to it to check. From the fan units connector within the upper case which then transitions to the keyboard/trackpad cable to the logic board.

crwdns2915684:0crwdne2915684:0:

open