This is almost the most important thing. The biggest problem people face is flashing a firmware that works, but their Wi-Fi stops working. This happens because the firmware's driver doesn't match the physical Wi-Fi chip on your board. Look for labels like SV6051P, SV6256P, RTL8189ETV, RTL8723AS, XR819, or ESP8089 .

Find discussion and firmware for the S905XQ4_V4.0 board on the 4PDA Community Forum . :

A: You can try a "hard reset". Find the small reset button (usually in the AV port). With the box powered on, press and hold the reset button for 10-15 seconds. This will boot you into Android Recovery mode, where you can select "Wipe data/factory reset". If this doesn't work, you must use the PC flashing method.

Locate the on the back of the TV box. Inside this port sits a hidden physical recovery button.

Extract the flashing software tool and open the application application file (e.g., FactoryTool.exe ).

Try switching the USB cable to a different port on the TV box (usually USB-4 or USB-1 interact with the processor data lines). Ensure you are holding the AV button firmly.

Click "Install". The box will reboot and begin the update. Do not interrupt the process!

Look at your PC screen. The FactoryTool should display a message like or change color to show a connected port.

the Amlogic USB Burning Tool from a trusted source like androidmtk.com.

Ultimate Guide: MXQ Pro 4K 5G Android 11 Firmware Download Gratis Fix