If the board doesn't automatically detect the update, you may need to rename the firmware file (often to allupgrade_msd338_4G_ref54.bin or similar).
The is a common Chinese "three-in-one" Android motherboard used in smart LED TVs from brands like Saturn, Elenberg, and Mirta. This specific firmware version is designed for a 1366x768 resolution screen. Hardware Overview Processor: Dual-core MStar CPU. Download MS338 PB801 1366x768 Ref54 Saturn part5 rar
You can change the board's supported resolution (e.g., from Full HD to HD Ready) simply by flashing a different USB firmware file like the one you're looking for. If the board doesn't automatically detect the update,
Ensure the backlight voltage settings on the board match your specific LCD panel to avoid burning out the LEDs. Download MS338 PB801 1366x768 Ref54 Saturn part5 rar