Chosen Solution
Hello all, i had recently upgraded my a1342 which meant taking it apart completely. Now once putting it back together, everything works just fine, except my keyboard. I’ve tried putting the cable back in, resetting my SMC (which doesn’t work since my keys don’t work) and it’s got the most recent update of OS. I’m not sure what other fix to try. Please and thank you! Update (10/31/2018)
here is my ribbon in the slot. The lever is still working and it seems to be in as far as it can go. Is it possible the ribbon is misconnected on the keyboard side?
Sounds like you didn’t fully reseat the keyboard ribbon or the latch is broken. As you can see in this image the latch is in the down position and the ribbon is fully seated
Carefully lift the latch up
Here we can see the latch is up as the cable is being pulled out
I use a strip of electricians tape to create a pull tab to make re-seating easier. placing the tape on the ribbon with the tab facing the contacts back enough so as not impede inserting. Make sure the latch is in the correct position before inserting and then carefully fold the latch down to hold the ribbon cable while you hold the cable fully inserted. It needs to look like the first image here. Before you put the ribbon back in do inspect it for damage did you tear it or damage the contact surfaces?
