Reconnect power. The indicator light (LED) will usually flash rapidly, indicating the update is in progress.
Place the firmware file directly in the root directory of the USB drive. Flash: Disconnect power from the TV board. Insert the USB drive. Download V53 816 1366x768 Normal USB rar
816 (Refers to the specific firmware build or board revision). Reconnect power
Unzip the .rar file to get the bin file (usually named VST53C_4MB.bin or similar). Download V53 816 1366x768 Normal USB rar