You will see a green Android bot and a progress bar. Do not unplug the device during this process. Once it finishes, the box will reboot automatically into the new firmware. The Amlogic PC Burning Tool Method If you have a PC and want a more robust installation:
If you own a Q6x V2.3 device, you are not alone. Several community hubs discuss this specific board:
This board revision (V2.3) often includes specific drivers for updated Nandflash memory and auto-aging support. Firmware Options for V2.3
While holding the button, plug the power cable back into the box.