: Insert your SD card into your PC and run SD_Firmware_Tool.exe as an Administrator .
You can find various versions of this tool as .rar or .zip archives from these community-archived and developer sources: : Available as a direct archive on Archive.org . Download rockchip create upgrade disk tool rar
: Click Restore (or "Create") to format the card and write the bootloader and firmware images. : Insert your SD card into your PC and run SD_Firmware_Tool