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To download the firmware for your (Main Board T.HV510.81 Go to product viewer dialog for this item.
The standby light should start flashing rapidly, indicating the update has started. during this process.
Copy the extracted .bin file directly to the (not inside any folder). Installation Instructions For the NIKAI T.HV510.81 board, follow this standard USB update procedure: Power off the TV and unplug it from the wall. Insert the USB drive into the USB 1 port.
Press and on the TV's side or bottom panel.
Ensure you are using the correct firmware for your specific panel (Resolution: 3840*2160 UHD 4K) to avoid issues like an upside-down or distorted picture.
Once completed, the TV will usually restart or return to a solid standby light. You can then remove the USB drive.