Chosen Solution
I have a 2010 Air 13" with spanish keyboard. Very little water was spilled on it but since then it s not acting correctly. I plugged in an external keyboard which makes it work almost right. It starts in safe mode though, so I d like to disconnect the keyboard to see how it works then. I took it to a repair center and they told me the mother board was dead, but I don t really believe them. Thanks.
Sadly the power on button runs through the circuitry to the keyboard. Replacing the top case is the best option. If you were to disconnect the keyboard you’d have to first set up scheduled start to boot the computer as the power own button wouldn’t work. If this answer is acceptable please remember to return and mark it.