So i have an old spare of a razer blackwidow ultimate 2014 edition keyboard and recently someone wants to buy it. problem is, the keyboard now suddenly starts flickering (disconnecting/reconnecting) repeatedly after a couple seconds of plugging it in. what i've tried:
using every single usb port connecting on 8 other pcs, 3 of which were laptops;
reinstalling proper drivers;
cleaned keyboard to 100% even on the motherboard and the back of the keys(did improve results but didnt fix it);
any other keyboard works perfectly fine. anyone know what the issue could be and how to fix it?