crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

The missing sensor would certainly cause the fan to run at full speed. If the computer seems to run fine besides the fan, there is no reason to suspect the logic board.  The main question would be way the sensor is missing in the first place.  I'd ask the original owner about it.

crwdns2915684:0crwdne2915684:0:

open