Place the firmware file (often named CtvUpgrade.bin ) into the root directory of the USB drive.
You can download specific versions of the firmware (rar/bin files) from trusted community sources. Make sure to choose the version that matches your TV's resolution and remote control type: Download CV338 A42 EMMC rar
Once you’ve downloaded and extracted your .rar file using a tool like WinRAR , follow these steps: Use a FAT32 formatted USB drive. Place the firmware file (often named CtvUpgrade