Wait for the indicator light to flash rapidly (this indicates the update is in progress). Once the flashing stops or the TV restarts, remove the USB.
A popular repository for universal board software. Download MS3663S PB801 1366X768 General Dump rar
To fix "hanging" at the logo, boot loops, or corrupted software where the TV fails to respond to controls. Common Sources for Download Wait for the indicator light to flash rapidly
Place the firmware file in the root directory of the USB (not in a folder). Flash the Board: Power off the TV/Board. Insert the USB drive. To fix "hanging" at the logo, boot loops,
.rar (Archive containing a .bin or .img firmware file).
Flashing the wrong firmware (e.g., wrong resolution or panel voltage) can permanently damage your screen or brick the board. Always verify that your board's physical model number matches MS3663S PB801 exactly before proceeding.