If the device doesn't detect the file, try a different, older USB 2.0 drive.
This indicates a critical bricking error, usually caused by flashing a file meant for an entirely different processor. Recovering from this state typically requires a hardware programmer (like an RT809F or RT809H) to manually rewrite the eMMC or SPI flash chip on the board. mstarupgradebin link
Once you have downloaded the correct file from a trusted link, follow these precise technical steps to force flash your television via USB. Step 1: Prepare the USB Flash Drive If the device doesn't detect the file, try