Chosen Solution
I have a wine damaged MBA mid 2012. We replaced logic board and IO board, but it still won’t turn on. The magsafe charger light is orange, and does’t turn green after the usual time to charge. I tried resetting MMC without change. There is no noise, no light with pressing the “on” button. Nothing else is obviously damaged inside. Update MBA-2012-13in-LB.pdf Attached is a photo of the logic board. It’s a bit different than the 11" logicboard. I’m guessing that the two solder spots highlighted might be the debug “on switch”, but wanted to confirm before attempting to short them. Two other questions: keyboard connected or not; and charger connected or not? Thanks TS
It may very well be that your keyboard is broken, as the power button is connected to the keyboard. To see if this is actually the issue, locate the power pads on your logic board as seen in the accepted answer by oldturkey to this question here. Using pair of tweezers, touch both of the pads for several seconds with the battery and all other components in the machine. If you hear a startup sound and the machine turns on, then you know that the keyboard is damaged, and that is about a $30 repair, though you will want to set aside several hours and an uninterrupted workspace because it involves many tiny screws. You can find a replacement keyboard easily by searching on ebay for your model number. Hope this helps!
