Probook 4530s Keyboard

Hello,

I'v got an issue where the shift keys on my probook 4530s don't work.
I've tried reinstalling windows, updating drivers and so on.
Confused I replaced the Keyboard an now a number of Keys won't work (e.g. Shift, A,S,D and a few more).
I've reinstalled the old keyboard an it has exactly the same issues.

I's appreciate any advice you guys could offer,

best regards, Sam