Unplug the keyboard again, then plug it back in. It should now function normally.
Disclaimer: Firmware updates carry risks. Follow instructions carefully. To help you further, could you tell me: with your K95 keyboard? K95.rar
If you have a K95.rar file (or similar .rar compressed file containing firmware), it is typically used for a "hard reset" or manual firmware update to fix a "bricked" keyboard (e.g., keyboard lights up but doesn't type, or iCUE doesn't detect it). Unplug the keyboard again, then plug it back in
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