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: Insert the USB drive into the TV's USB port while it is powered off.
complete, the TV usually restarts. Remove the USB drive immediately to prevent a repeat cycle. Troubleshooting Firmware Issues
: Ensure the USB drive is under 16GB and formatted strictly to FAT32.
: Many boards require the firmware file to have a specific name (e.g., allupgrade_638_733.bin ) to be recognized by the bootloader.