Left Command + Z isn't working anymore I have a full size Apple keyboard attached to my MacBook Pro. The left ⌘ + Z key combination isn't working since a while.


The problem only occurs when using the left Command key. ⌘ + Z is working fine.
The left Command key works fine with other combinations, such as left ⌘ + X.
The problem only occurs when using the external keyboard. Left ⌘ + Z is working fine on the MacBook itself.


I tried restoring the keyboard settings to its defaults, to no avail. This could be a hardware problem, but I can't understand why the left Command key works fine in combination with other keys.

I'm clearly lost here. Any ideas?

Edit: Tested the keyboard on another MacBook and it's having the same issues. So, it's most likely a hardware issue. Can this be fixed?
Fixed it! Cleaned the area underneath the Z key and everything is working again. :-)