BlackWidow Chroma V2 stopped writing

Greetings everybody, Yesterday I upadated software, today my keyboard stopped working. -RGB works, running from left to the right -Typing changes color in fading green, but PC doesn't recognize it as a button. I could describe it something as safe mode? I can't write anything or use it as function on PC But keyboard functions such as increasing light or enabling gaming mode / macro works fine. USB input works fine too.. Everything works fine I guess, but I cant write anything. Solutions i tried: -connect it on second PC -reinstalling software (tried with older version but I was forced to update it on new one) -reset it with key B and L pressed together while it was reconnecting ( dont know is that right way to reset) -different USB ports I don't know what should I do. Also, I don't have warranty paper for it so I guess I can't send it for RMA. p.s. i'm using Deathadder Elite which works great.