my huntsman mini not working at all

My huntsman mini isn’t working at all it was fine but i pressed i think it’s ( FN ) and it shows some rgb lights on some letters then it turned off and i pressed the same button again but nothing happened the keyboard isn’t working at all the rgb isn’t working nor the keyboard itself i tried to re-plug it but it didn’t help and i can’t open my pc because it requires password but i don’t have a keyboard to open it ! I tried to search in the internet for a fix but no one has like my problem many people have at least rgb lights but the can’t type I DONT EVEN HAVE THE RGB LIGHTS !