I've only had the keyboard like 4 weeks and the backlights have been working fine. I've always had the lights set to go off when the display sleeps, but this time Windows restarted and I haven't been able to get the backlights on again. I've gone into Synapse and tried manually turning them off and back on, tried unchecking "turn lights off when display is off" but that doesn't even respond to anything. Tried unplugging and replugging it in, etc. Nothing.