Razer Blackwidow Ultimate Stealth 2016 - how to remap a dead fn key??

In my Razer Blackwidow Ultimate Stealth 2016, the fn key died. I tried to remap it but found out I have to press it to remap, but as it is dead, I can't do it. tried sending an email to support but I can't as I don't remember the date of purchase, which is required to send an email through razer support. does anyone know can I fix it?
edit: and its past warranty.
edit 2: It doesn't matter I found a workaround. I mainly used fn for media control and i just found out you can bind keys to media control without using fn...