After replacing my battery on the macbookpro 15" (mid 2014), certain keys (in a diagonal column) don't work. I tried taking out, blasting it with compressed air, in case there was some dust, and reinserting. It still doesn't work.
I tried resetting the smc but still no luck.
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It is possible that something went wrong with the keyboard connector or cable (step 23 from the tutorial). If it was unplugged then replugged, maybe some pins got bent, or scratched away, or the ribbon cable got torn. Try checking it out with a magnifying glass. Also, check if nothing look scratched or damaged on the printed board near the connector.
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Hi Eve,
Thank you so much for your response. I will check to see if any of the pins look messed up. I did see that the ribbon had a slight bit of wear (just the matte ribbon had some slightly darker spots from where i used the tweezers to try to reinsert the ribbon, do you think that may be it? I also got a new keyboard but it doesn't seem to have the same ribbon, maybe it connects to that ribbon and I am nervous that this is not the part that's damaged so maybe it's not worth it to reinstall a new keyboard. What do you think?
Any idea what I can do if I did damage the ribbon?
I suspect the problem comes from the keyboard and its cables, because one diagonal line is down, and keyboards connectors work in array, so one broken strand would impact an entire line or column. But indeed, it is difficult to verify... Maybe you could extract the keyboard and find where is the other side of the cable. Then, with a multimeter in continuity mode, you could verify each one of the cable strands (I think there are 32 of them).
If only the ribbon cable is damaged, maybe it is possible to find a replacement, otherwise, changing the whole keyboard will probably be the best option.
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