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Place the firmware file in the root directory of your USB drive. Do not put it in a folder.

The biggest challenge is that this firmware is available for public download on the manufacturer's official support websites. You must obtain it directly from your TV's brand support. Follow this step-by-step guide: rtd298xtv001eng 442 kot49h update exclusive

Press and hold the physical or Recovery button on the mainboard. Place the firmware file in the root directory