Razer Mamba dead.

I've had this Mamba for a couple years, but I am hoping there is something I can do before dumping it...

So its worked just fine until today... last night I plugged it into charge... there was still charge in when I plugged it in... today nothing... its like it didn't charge... but it doesn't work when plugged in either... I checked and the USB ports on the PC, they work fine and the USB cord that comes with the mouse appears to charge another device I have just fine... but when that same mouse cable is plugged into the Mamba... I get a connection sound from Windows 10, but the mouse doesn't come on (no lights, even when I toggle the power switch) and synapse says its not connected...

So I checked the micro-USB port on the Mamba, to make sure its clean... it is... not sure what else to try...

Thanks for any help.

Chris