Do not power off the board during the firmware writing process. Interrupting the update can brick the board, making it unusable.
For restoration or analysis purposes, the following procedure is standard: Rr52c.03a Firmware
Updating or installing the firmware is usually done via a USB drive. You can find technical documentation and discussions on sites like AliExpress Preparation : Format a USB flash drive (8GB or less recommended) to File Placement : Copy the firmware file (usually named allupgrade_ms3463.bin or similar) directly onto the root directory of the USB. Connection : Insert the USB into the TV's USB port while the power is Connect the power cord. Do not power off the board during the
