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I have a early 2014 MacBook Air that suffered water damage around a year ago, to the point where it didn’t work any more. It was my mother’s at the time and she got it replaced by a newer model because a repair by Apple would apparently cost around $1200. I found the old MacBook a couple of days ago, opened it and see some corrosion on the logic board; a couple of spots here and there. I know how to properly clean it (with isopropyl etc., loads of tutorials online on that) but my question is - is it even worth trying? All the water damage repairs and corrosion cleaning I find on this model online is obviously done very shortly after the damage took place. But now that over a year has gone by, would the logic board even be affected by a proper cleaning? Or is it most likely completely fried? Any input here is appreciated - I’m a newbie :)
Edvard Toft post some images of your board with your question. Let’s see how badand where the corrosion is. Use this guide Adding images to an existing question for that Right now, you have nothing to lose so might as well give it a try. After all, this is iFixit and not iReplaceit until proven otherwise. Clean the board properly (use the online tutorals and be thourough with it). After that reassemble and then try to and then try to start it up. Only after you have cleaned it properly can you determine what the real issues are. Let us know what you find out and double check to ensure that your board is a 820-3437 Update (09/25/2018) Edvard Toft your boards shows quite a bit of corrosion. So proceed with a proper cleaning as adressed by @arbaman The green stuff is corrosion and in this case can cause short circuits. Hence the absolute necessity to clean the board properly. The parts that are marked are Q7130 which is a RJK03P0DPA High Speed Power Switching Dual N-channel Power MOSFET and Q7155 which is a Si7137DP P-Channel 20-V (D-S) MOSFET Both of those components are part of your PBus Supply and battery charging circuit. So, you do now start to understand why it is important for us to know what exact board number we are dealing with. You also see now why things may not have worked when the board initially got damaged. It seems to have “hit” the power circuitry.
Well, I think that Logic Board is toast. It’s kind of like spilling pancake batter on the counter on Saturday and cleaning it up promptly (easy to clean up) rather then versus spilling pancake batter on Saturday and waiting until Sunday to clean it up (not so easy). However, you can buy a new Logic Board from here at iFixit and install it with a guide that is conveniently located here too. It is a hefty price tag but if you truly do want this computer to work again you will need to at least try this. Be aware that this may not solve your problem as there could be more water damage to the Mac then we think and that might completely total your Mac. If the new Logic Board from here at iFixit does not solve your problems then you can return it quick and easy for any reason as iFixit stands behind their products very well.
MacBook Air 13" (Mid 2013-Early 2014) 1.4 GHz Logic Board MacBook Air 13" Early 2014 Logic Board Replacement
