Under “BRIGHTNESS”, adjust the slide bar to set your preferred keyboard lighting brightness. Select the device and click on the “LIGHTING” tab. How do I make my blackwidow keyboard light up? If you have another keyboard, try plugging it in and pressing Num Lock to see if it responds. If your keyboard uses a USB connection, plug the keyboard into another USB port and try pressing Num Lock again. If the light is steady or doesn’t come on at all, then the keyboard and computer aren’t talking to each other. Why does my keyboard light up but not work? Additionally, you might have to tweak your Razer profile. To fix your Razer keyboard you should make sure Razer Synapse is updated. The Chroma Apps might also be responsible if your Razer keyboard is not working. If Razer Chroma is not working on your PC, the problem might be as simple as a connection glitch.
Select the Razer Chroma supported product, click on the “LIGHTING” tab.