Hi DanielBESSIS,
Thank you for reaching out Microsoft Community. We're sorry for the inconvenience this may have caused you.
Is this currently connected to a desktop computer? Have you tried uninstalling/reinstalling the keyboard driver in Device Manager?
If you already uninstalled/reinstalled the driver but it didn't resolve the issue, what I can highly recommend is to contact our Supplemental Parts Support: 800-360-7561 to get further assistance in getting this keyboard replaced.
If this helps, feel free to mark this post as an answers your question, feel free to mark this post as an answer. Otherwise, don't hesitate to respond to this thread if there's anything else that needs to be addressed.
Kind Regards,
Crest_Z