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MBP 2015 problems after logic board replacement

Flow91

macrumors newbie
Original poster
Dec 10, 2015
19
4
Dear community,

I have replaced the logic board of my MBP early 2015 (no liquid damage) from the base line configuration to the 2.9 GHz version.

After a clean install, first about 2/3 of the keys worked, but soon after the keyboard failed completely. The trackpad still works. The computer is very slow and the fans are running at full speed constantly. Also the „About my Mac“ field doesn‘t show „Early 2015“ anymore, but just „MacBook“. The laptop is unusuable in this condition.

Is there anything I can do softwarewise to get it running normally? I didn‘t break any connectors and they all went back into their place perfectly. I feel like the board is not really compatible although it should be and I can‘t reset SMC or PRAM because the external keyboard is not recognized when booting up.

Thanks for your help and your ideas!
 

LinkRS

macrumors regular
Oct 16, 2014
168
123
Texas, USA
Howdy Flow91,

Sounds to me, that your new logic board is faulty. If you sure that you didn't damage anything during the install, and made all connections fully/correctly, then it must be the logic board itself. A key sign that you have some sort of hardware issue is that it worked, and then didn't. Plus, the fact that you can't even use an external (USB?) keyboard, indicates a deeper issue. I would suggest you put your old one back in, and then contact the seller of your new one for support.

Good luck!

Rich S.
 
Comment

Nbd1790

macrumors regular
Jan 2, 2017
212
103
New York
I agree with Howdy. I don't think what you're seeing has anything to do with software. It's possible something went wrong while installing the Logic Board, but it most likely was defective out of the box.
 
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Flow91

macrumors newbie
Original poster
Dec 10, 2015
19
4
Thanks for your help and your replies! I contacted the seller and he told me that the logic board was checked and fully functional before he shipped it. I just turned on the Macbook and it's strange, but it's back to normal performance - and it also has recognised the logic board; now it gives me the correct information about it under "About my Mac".

There's only one thing that still bothers me - the internal keyboard isn't working, except of the keys "ctrl", "alt" and "cmd" (German layout). Is there any way of updating the kext-files for the keyboard? When I started the Macbook with the new logic board, it switched to an English keyboard and since then it doesn't work anymore.
 
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