MacBook Pro Mid 2012 Liquid damage

A friend of my wife's MacBook Pro got something spilled on it. Since then (don't know how long ago it happened) the computer will shutdown unexpectedly after a few minutes of running. After it shutsdown, it wont finish startup before shutting down again.


She took it to the Apple store, they reformatted her harddrive as they said it was a OS issue. That obviously didn't help, don't know if they even opened it to see the liquid marks inside or not. They told her it would be $500 for them to continue to diagnose, not sure what their plan was...other than they told her there was no guarantees it would fix it.


Anyway, that's when I ended up getting involved. I didn't know any of this was going on until she asked me what Apple product she should get to replace it, another MBP, Air or iPad. I asked her what was wrong with hers, she told me the above story, but didn't mention the liquid damage, don't think she knew at this point. i asked if I could take a look at it, thinking I would try one of my old hardrives and/or RAMin it to see if that was the issue.


When I got it today, I started it up and it ran perfectly for about 3-5 minutes, then shut down. Once it shuts down, it won't restart unless you let it sit for 5 minites or so. The case does not get warm at all. I decided to open it up to try our spare hardrive in it. Once I got the bottom off, you can see visible staining on the inside of the bottom and on the logic board, which shows some corrosion. It's obvious this is the problem, not the hardrive (I tried it anyway with the same results).


My question is, is it possible to clean the board? Or is it replace the board or get a new computer at this point?


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MacBook

Posted on Oct 24, 2016 2:35 PM

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10 replies

Oct 24, 2016 3:57 PM in response to gflande1

HI, yes it is possible to clean it. It may be successful looking at the photo. . Use Isopropyl alcohol and a toothbrush. Gently clean the board and remove as much corrosion and spill residue as possible. The alcohol will dry quickly. Test the MacBook by booting. Repeat the cleaning if it is still faulty. A lot depends if components were damaged by shorting and it you are able to stop the shorting.


Cheers


Stu

Oct 24, 2016 5:49 PM in response to stuartpm3

Thank you. I've cleaned it twice with a soft childs toothbrush and 91% isopropyl alcohol. Same results. I would guess the only way to really get it clean is to remove the board to see if anything got on the other side.


I will try it a few more times, but won't feel comfortable enough to take the board out, too many difficult looking wires.

If cleaning the bottom doesn't do the job, I guess replacing is the next step.


thanks

glen

Oct 25, 2016 12:38 AM in response to gflande1

HI.


A replacement logic board in the uk costs £600. Not much less than s new macbook so you have little to loose by trying to clean it. You need to take logic board out to inspect and clean both side. There are good instructions on youtube. Main points are having the correct screwdrivers for the logic board screws ,which are not expensive and getting the connectors to the board removed carefully. Its not that difficult and worth a try to save the macbook.


cheers


stuart

Oct 25, 2016 9:16 AM in response to stuartpm3

This morning, just to see if it could be a RAM problem (maybe that got wet too), I took the RAM out of my Macbook Pro and tried it in hers, same result, failed at about 3 minutes.


I decided it didn't hurt anything to take the logic board and thoroughly clean it. It was easier than i thought using the the instructions from youtube and ifixit.com. The top side of the logic board had no signs of liquid or corrosion. I removed the speaker from the logic board and thoroughly cleaned both sides, multiple times. I used 91% isopropyl alcohol and a soft child's toothbrush I just bought. Everything's went back together easily. I used the original hard drive and RAM to test it again. This time it made it to approx 20 minutes before failing.


I did run diagnostics, which passed.


Any other ideas? Can i disconnect any of the components (speakers, backlights, keyboard, etc) to see if that is the issue? I'm getting to the point that I don't have anymore troubleshooting steps I can perform, so any suggestions would be greatly appreciated.


Also, how do I know what logic board to order? Its a 13 inch Macbook Pro Mid-2012 with a 2.9 GHz Intel Core i7 processor.


Thanks

Glen

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MacBook Pro Mid 2012 Liquid damage

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