Razer Huntsman H key doesnt work

Have you tried disabling Synapse and checking if it behaves the same without it in the background? Sometimes build-up dirt or dust underneath its switch can cause this issue. For now, please try using a can of compressed air to clean the switches of your keyboard. You can also use this guide to clean your keyboard. Should the issue persists, PM me the serial number of your device along with a screenshot of your MSINFO32. I can use that to take a closer look at your system and check for a model-specific fix for this. *Thread locked to curb the conversation to PMs.