2 
1 After water exposure, high fan speed
Water spill on my MB Air.
Replaced the logic board.
Batteries will not charge (a separate issue), so I start it up with the magsafe plug attached.
Boots like normal, but by the time it gets to the login page, the FAN IS RUNNING AT MAX.
The fan speed gradually increases over the first ~30sec after booting.
Any suggestions are greatly appreciated...
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Did you replace the thermal paste when you reassembled it?
por Reed Crosby
Good call Reed--that would've been a good explanation. But I DID use Arctic Silver when installing the new logic board.
por dcquickdraw
Ok. Well, I hate to do this to you, but I have no idea. Sorry I could't help.
por Reed Crosby
Not sure if this was the solution or if I got lucky with the timing:
I went ahead and reset the System Management Controller
https://support.apple.com/en-us/HT201295
And everything booted up appropriately after that!
por dcquickdraw
Well, as a side thought, there may be a thermal sensor somewhere on the board that is shot.
por Reed Crosby
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