We found a similar issue on the Tt X1 RGB mechanical keyboard, and have a solution that may work...
So, after fumbling around with unplugging, re-plugging the USB connections, power cycle, remove power from outlet, it came down to more fiddling around and we figured out how to get it to no longer be 'stuck' with all three Lock LEDs flashing. There is a key labeled "Fn", press that and the Num Lock, and this restored it back to working again. Hopefully this helps anyone else with the same issue.