Blackwidow chroma v2 game mode stopped working completely

So the overall problem is that game mode seems to have left the building. Any thoughts? I have not checked the actual bulb, but the fact that the windows key is always working is my only real indication that the mode just doesn't engage.

I started noticing the 'G' symbol not lighting up about a month ago. I noticed this about the time I realized the Windows key is always live. The settings in Synapse3 are correct for 'in game' and there is a game linked. The manual fn+F10 does not toggle the light (or I assume the mode) either. Everything else checks out. Google searching seems to suggest the usual problem is that the windows key wont work at all. The Keyboard and Basilisk mouse both have profiles that can be switched back and forth. The only way I really know for the keyboard is that there are some macros on the M1-5 keys, but it activates just fine.

I have saved the profiles, deleted, tested with and without a game started, imported. I have disconnected/reconnected from the computer. I have not deleted and reloaded Synapse. That is about the last thing I can think of to try.

Edited to add: I plugged into a laptop and the Fn+F10 worked to illuminate the 'G' for game mode. So it seems the problem is with software.