Chosen Solution
Hello! I have a MacBook Air 13 (Early 2014) with liquid damage with motherboard 820-3437-b. When I plug it to MagSafe and detach battery it works great. But with battery often shutdowns unexpectedly (as full power outage), whether power is connected or not. I have replaced SMC controller with cable, battery. I tried to reset SMC and NVRAM. Today I received refurbished motherboard for my MacBook and tried to test with it, but it didn’t help. Please help with this problem. Thank you. Coconut information:
If you haven’t replaced the battery, that might be your next step, as it might have gone bad too and causing shutdowns. I can’t figure what you mean by “SMC controller with cable”, but if by that definition you mean the I/O board and relevant flex cable, after replacing the logic board there are only keyboard and trackpad left. If you still have issues after battery replacement, if you have a mouse and a usb keyboard you may try disconnecting the connecting cable and see if that fixes the issue. If that’s the case I’d suggest trying replacing in 2 steps trackpad and connecting cable and keyboard or topcase as last resort. Also check the display and camera connectors are in good working order and undamaged.
