Keyboard and trackpad stop working intermittently repeating keys

My keyboard and trackpad frequently stop working and im not sure what the reason is. Sometimes i only need to close then open it again to get them to work, sometimes it requires a full restart, i have spilled water on my computer in the past but im not sure if that is the issue. Also sometimes, like right now the caps lock light is on but im not typing in all caps. and recently it has started repeating keys which isn't stopped by hitting another one it just keeps repeating and i need to restart, there must be a short somewhere and i believe i need to replace the keyboard i can do that i was just wondering if anybody had insights to another possible cause

Beantwoord! View the answer Dit probleem heb ik ook

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I should mention that i have had a few kernel panics recently im not sure if that is related because i have had to remove a stick of memory in the past due to kernel panics

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Hook it up to an external keyboard. If the keyboard works then the problem is with your internal keyboard. Let us know the results and we can direct you to the correct parts and procedure.

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When the keyboard isn't working an external keyboard does work so as you said the internal one is most likely the problem. Also the when the keyboard isn't working the trackpad also doesn't work is there any way they are related issues? thanks for the help.

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They are very much related and use the same ribbon cable to get to the logic board. Please try this: remove your battery (inspect it for swelling). Leave it out and start up the machine and see if the problem persists.

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well i think i can rule out battery swelling as a cause, because it is relatively new, its only a few months old and still looks brand new. im not really sure what to do at this point. this morning i had problems with it not working, but since around 2 today ive had one small issue but it resolved itself it has worked both with the battery and without. Im sure the problem will return, i think there is probably some connection issue as the light for the caps lock tends to flash when there is an issue, i have no idea why. thanks for the help as it is with these things whenever you want it to happen it never does.

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First remove the battery and power adapter, then hold down the power on button for 10 seconds. Next zap the PRAM (restart holding down the P, R, option and command (Apple) keys), wait for three tones then release. Is the caps lock light flashing or flickering?

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I have exactly the same problem with my macbook pro... it's been like it for a few months now. I've a wireless keyboard and mouse which work perfectly whenever the laptop keyboard/trackpad fail. A more recent development is the kernal panics which are happening probably twice a week on average, although sometimes I'll get four or five one after another.

I've heard the rumour about this often being caused the keyboard ribbon under the battery and have tested that out by inserting a small piece of paper between the ribbon and the metal of the case, but it hasn't helped at all. I have also tried removing the battery completely and just running from the mains, but the problem persists.

I took it into my local Apple store and consulted a "genuis" who suggested that it could be that the plists are corrupted or else the logic board has failed. I know it's not the plists as it happens for all users - including new ones I've set up to test this theory. If it is the logic board and this affects other machines, shouldn't Apple repair it even outside of warranty?

I'm all ears for suggestions of anything else I could try!

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Hey,

I have an update on this. The week after logging my comment above I decided to replace my HDD... I was running out of space and figured that I had nothing to lose except the $80-odd cost of the new drive.

Well, I followed the ifixit guide and everything went smoothly:

MacBook Pro 15" Core 2 Duo Models A1226 and A1260 Hard Drive Replacement

Whilst I had the unit open I also blasted all the dust out with a can of compressed gas.

It's been about four weeks now and so far (touch wood) I've had absolutely no problems with the keyboard or trackpad. I also notice that the unit runs signficantly cooler (around 20C less on the CPU and GPU). I don't know whether dust, heat or a general lack of disk space was the cause of the keyboard/trackpad problems, but whatever it was doesn't seem to be an issue now.

I'm not going to advise anyone to take their laptop apart if you're at all unsure about it, and certainly not if it would affect a warranty you may have. But personally I figured it was driving me up the wall and I had nothing to lose... if it didn't work I was fully intending to throw the thing out the window and buy a new unit. So for me it was all good.

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Sorry, looks like no one saw your question as it was tacked on to someone else. This is why we ask that people start their own questions. Glad you could solve the problem on your own.

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Nicholas Ellison zal eeuwig dankbaar zijn.
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