Hello! I have a 13" MBP from Late 2013 and wanted to use it after a couple of days of not using it. Sadly, I discovered the keyboard has broken. Whenever I press Left shift, left ctrl or left alt, all three of those keys are triggered. Right shift works fine. I did not test right ctrl and right alt. I thought this is a software problem at first (pressing some key combination by accident, e.g. the last time I cleaned my keyboard, or faulty third party software), because according to my understanding of keyboards, it's not possible for them to break in a combination like that. However, I also tried the bootcamp partition and it's exactly the same there, so a software problem is not very likely. Does anyone know what I can try to fix this?? Best regards, a desperate mac user Edit: - Only the right shift appears to be working fine. - I tried an external keyboard and it worked fine - The affected keys began to trigger even when not touching any of them, which makes ignoring them and using right shift impossible - Every other key is working fine How could this happen? Does this fall under warranty?