I'm not sure what the problem is to be honest, but once in a while (few days to a week) my keyboard will just straight up stop working. Like its frozen. I'll try unplugging it and plugging it back in. Ill try different USB ports, but nothing will work. The only consistent solution I have found is to simply unplug it and leave it for a day or two and use another keyboard in the interim. Like the internal capacitors need time to discharge or something. The LCD display, pass-thru USBs, and the volume slider all still work when this happens though. Its strange.
I am currently typing this on my Z10 and its working just fine. It seems to occur during startup or long idle times (I tend to leave my PC running when I go to work). I originally opened a support ticket and was told I can RMA it and that was when I originally thought it was permanently bricked. Idk, I'm on the fence about it, because I really love this keyboard and it works most of the time. I figured I'd share this problem with the people on here.
Check out my PC! EVGA DG-85 (Case)
EVGA 1080 FTW Hybrid (GPU) [x2 SLI]
EVGA 280 CLC (CPU Cooler)
EVGA Z370 FTW (Motherboard)
Intel i7 8700K (CPU)
Corsair Vengeance 16GB [2x8GB] (RAM)
Seasonic 850W (PSU)
Some Corsair fans, EVGA Z10 KB and X10 Mouse