I have a Macbook Pro mid 2012 (2.9GHz version) and the last week these keys stopped working (there was no spillage or something similar). I tried to change the keyboard by another new and the problem did not go away... the same keys failed. Of course I tried with different external operative systems, so the problem is not because of the software. One friend of mine looked at the connector at the microscope and cleaned it. He told me that it is in a good state, and it is also true that before it stopped working I did not unplug the keyboard. I think the problem is in some track in my logic board... How could I solve my problem? can somebody help me?
Thanks a lot