MacBookPro Keyboard & touchpad wont work after disconnecting

After cleaning the fans and reassembling, computer starts fine but keyboard and touchpad wont work. Everything else seems to work fine. I followed step by step instructions on manual. Connected upper case cable twice, still won't work. Might be connecting something wrong?

Any tips or advise?

Thanks!

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There doesn't seem to be any damage done to the ribbon cable or connector, i will try replacing the cable to see if this works. Ill keep you posted. Thanks.

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I have examined the ribbon cable and connector thoroughly and there doesn't seem to be any cuts. The strange thing is that sometimes they work fine and all of a sudden they stop working for several days. Any other ideas?

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Chosen Solution

Quite possibly you loosened or damaged the ribbon cable or connector, reexamine them for cuts/nicks and a poor connection. (You might need to use a magnifying glass)

Remember to return and mark accepted the answer that best solves your problem.

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I have examined the ribbon cable and connector thoroughly and there doesn't seem to be any cuts. The strange thing is that sometimes they work fine and all of a sudden they stop working for several days. Any other ideas?

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Most Helpful Answer

Try replacing the cable. If that doesn't work, replace the upper case. If that doesn't work, replace the logic board.

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Since that cable is built into the keyboard, how do you do this? Why replace the uppercase rather than just the keyboard? Nothing indicates that it needs a logic board replacement.

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I was referring to the cable that connects the upper case to the logic board. And, yes, thank you for correcting me. I did mean the keyboard.

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