"br23uboot1.00" is not an app or a piece of software you interact with directly. It is a low-level binary file used to bring a hardware device (like an Android TV box, a tablet, or an IoT device) to life. U-Boot is the critical piece of software that runs immediately after the device is powered on, initializing the hardware (RAM, CPU, Storage) before handing control over to the main operating system (usually Linux or Android).
Have you checked if the on the back provides any response? Share public link br23uboot1.00
Launch the proprietary application, such as the GameSir Nexus app or Gamesir T4k app, to see if a prompt appears to automatically fix or initialize the firmware. "br23uboot1