If it does, the problem might be caused by your Razer Synapse. If it doesn’t light up, it might be a hardware problem and you need to contact Razer support. Plug your keyboard into another computer to see it light up or not. Fix 2: Uninstall and reinstall Razer Synapse If it doesn’t light up, move to the next fix. If it does and everything works well, it’s your USB port that has the issue. Plug your keyboard into another USB port and check if it does light up. It’s probably caused by the poor connection. Try these fixesįix 1: Plug your keyboard in another USB port Don’t worry, you’re not alone and you’ve come to the right place! The fixes here can solve this problem. If you have a razer keyboard which has many lights on and meant to lighten up, but it stops working, you might be frustrated.