Install ATVXperience v4 Pie on Amlogic Android TV Box (S905x)

1. Download the atvXperience Image Download
2. Download Amlogic USB Burning Tool Download
3. Extract the downloaded Amlogic USB Burning Tool
4. Launch Amlogic USB Burning Tool
5. If the user interface is not in English, select the second option in the Menu > English
6. Select File > Import Image
7. Browse to the downloaded atvXperience image and select it
8. After the image is verified click the Start button
9. Connect the TV box from the OTG port to the PC via USB cable
10. Press the reset button (sometimes hidden inside the AV port)
11. Wait for the ROM to copy over to the device
12. Once the process completes (100%: Burning Successfully) click the Stop button
13. Disconnect the TV box from the PC USB
14. Connect the TV box to an HDMI display and power it on
15. Enjoy a clean and fast Android TV experience on your Amlogic TV Box

Source: https://forum.atvxperience.com/viewtopic.php?f=3&t=2728