The battery may be completely drained. Connect it to a charger and wait 15 minutes before attempting to power it on.
You can verify all button and analog stick functions by connecting the gamepad to a PC and using the Gamepad Tester web tool [8]. for a particular game or finding a digital copy of the full manual? gamepad 8710 manual
Gamepad 8710 Manual: Comprehensive Guide to Setup, Usage, and Troubleshooting The 8710 Wireless Bluetooth Controller Go to product viewer dialog for this item. The battery may be completely drained