miniSTREAK TKL 80% - only arrow keys and CAPS LOCK not working

Hello,

I have a problem with my miniSTREAK keyboard.

First of all, the keyboard was not damaged, dropped or hit.

My "CAPS LOCK" key and the "arrow keys" are not working since yesterday.

But when I press these keys on the keyboard, the keys lights up as in response.

Also when I press "FN+F5" for the lightning configuration, I can choose between the possible configurations using the arrow keys... Conclusion the keys are not broken.

Things I already tried:

• restart the computer

• resetting the keyboard (with the pin on the back)

• deleting and installing new driver

• FN-Lock and multiple shortcuts/combinations

• competetive mode "fnatic-key"

• lot of googling around...

maybe there is a very easy trick or keyboard shortcut I dont know?

I would be happy about any help!