Chosen Solution
Hi. Have seen other answers on power jumpers on macbook, but haven´t found one for the Air 2015 mod. Do anyone knows if there is a power jumper on this modell, and where it is? :) Thanks.
I don’t know if there is a jumper. But if you are trying to get it to boot, try this. Unplug the battery and mag-safe. Press and hold the power on button for 10 seconds. Reconnect the battery and mag-safe and you should get a spontaneous reboot.