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2 Odd behavior powering on after spill. I/O board?
So, like a lot of people apparently, I spilled a glass of water on my MacBook Air. I turned it off immediately before it could short circuit. Since then I've cleaned the internals and let it dry. I can find only one small sign of corrosion, on the left I/O board, not far from the I/O board cable that connects it to the logic board.
The computer behaves as follows. It will not turn on when the power button is pressed on battery, though I believe the battery may be discharged. The MagSafe cable does not illuminate, and I cannot charge the battery with it. When I disconnect the battery, the cable does not light either.
However, when the battery is disconnected and the charging cable is connected with the internals exposed, the cooling fan can be seen intermittently turning on and stopping. When the power button is pressed in this circumstance, the startup chime sounds and the apple logo appears dim on screen, as during the first few seconds of startup. However, the computer turns off after a few seconds.
Additionally, when I took the computer to the Apple Store (figured I'd give it a shot, since there is only the barest hint of corrosion), and they plugged it into their cable, the cable did light for a minute or so before going out. No attempts were made to turn on the machine during that time.
Does this behavior in combination with slight corrosion there sound like a dying I/O board as opposed to a dying logic board? Obviously that would be a much less stressful replacement, but I'm also not going to kid myself into a false sense of ease.
Thanks in advance for your help!
EDIT: I also, upon further inspection, see what looks like charred/blackened/damaged pins on the I/O board-Logic board flex cable at the connection to the I/O board. There is also similar damage on the corresponding pins on the I/O board, and that is indeed a point where the corrosion exists.
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