Some keys are not working after keyboard replacement

Question

MacBook Pro 13" Unibody Mid 2009

Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor EMC 2326

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Alexander @bisy

Rep: 11

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Gepost: 7 jan. 2020

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Some keys are not working after keyboard replacement

Hello everybody I am having a problems with my Macbook Pro after replacing the keyboard.Some keys are not working for example the F1 and the back slash key does not works and the volume down key got stuck not physically but after 3-5s work it works but the volume keys are not working than I mean after I press once the volume down key turns the volume all down and after 20s-30s I can only turn it up via function keys.This was the first problem.The second is when I turn my macbook on holding the option key it does nothing but in system the option key works.I tried smc reset but I could not perform the NVRAM.

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Ja Nee

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4 opmerkingen

Did you plug the keyboard connector all the way in?

7 jan. 2020 door Jen

Yes the keyboard connector is pluged all the way in.

8 jan. 2020 door Alexander

@bisy Why was the keyboard replaced in the first place ?

8 jan. 2020 door arbaman

Because it was spoiled coffe on it and the keys wouldn't work.

8 jan. 2020 door Alexander

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arbaman @arbaman

Rep: 102,6k

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Gepost: 8 jan. 2020

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@bisy The coffee spill pretty much answers your question. There’s most probably corrosion occurred to the zif connector on the logic board when the old keyboard got shorted by the spill. Either that or worse the IC taking care of keyboard circuits. You can try brushing carefully the zif connector on the logic board with >90% Isopropyl alcohol and see if that helps, but it’s just an attempt that may not change much either. Without being able to see connector’s condition under a microscope it’s hard to figure out what the condition may be.

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Ja Nee

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4 opmerkingen:

Well I will try it thank you for the answer but while I'm booting to macOS i couldn't perform any command I mean command+r or nvram reset or go to the startup manager I tried external wired and wireless keyboard but no result.

8 jan. 2020 door Alexander

@bisy Best thing to do would be to try an ultrasonic cleaning of the board, it might be coffee reached other board parts and it's starting chewing up metal. If that's not an option, I'd suggest to try at least a hand clean, you can follow this guide for basic guidance:

MacBook water damage - The definitive guide

8 jan. 2020 door arbaman

you have some circuits shorted or lost due to corrosion. Clear very carefully as stated by @arbaman

>>> I tried external wired and wireless keyboard

Due to the short any command is handled by the 'system' differently.

8 jan. 2020 door bmx2019

But before the keyboard replacement it worked.

8 jan. 2020 door Alexander

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Because it was spoiled coffe on it and the keys wouldn't work. — Alexander
Well I will try it thank you for the answer but while I'm booting to macOS i couldn't perform any command I mean command+r or nvram reset or go to the startup manager I tried external wired and wireless keyboard but no result. — Alexander
@bisy Best thing to do would be to try an ultrasonic cleaning of the board, it might be coffee reached other board parts and it's starting chewing up metal. If that's not an option, I'd suggest to try at least a hand clean, you can follow this guide for basic guidance:

MacBook water damage - The definitive guide — arbaman
you have some circuits shorted or lost due to corrosion. Clear very carefully as stated by @arbaman

>>> I tried external wired and wireless keyboard

Due to the short any command is handled by the 'system' differently. — bmx2019