Razer edge pro 2013

I bought a used Edge pro 2013 with gamepad controller for a damn cheap price.  I need to change the battery of the tablet but no problems here. The powercable is always on it. Tablet work fine and got windows 10. The only downside i have is the gamepad! The razer logo is lit on the back, but nothing on the buttons of the controller. Is it driver firmware fault ? Windows 10 fault because its supossed to be on windows 8 ? Or is the controller itself the problem ?  The game pad have no extra battery in it. Thank for the help !