after "VEN_" or "DEV_" provides more results than the full specific version string.

Use a thumb drive with at least 1GB of storage, formatted to Copy Firmware: Place the firmware file (often named MstarUpgrade.bin or similar) in the root directory of the USB drive. Initiate Flash: Power off the TV and insert the USB drive. Hold down the button while plugging the power cord back in.

Tip: Rename the file to MERGE.bin if the board doesn't recognize it automatically. : Turn off the TV and unplug the power cable. Insert the USB drive into the TV's USB port.