For a specific firmware download for this board, you can check community-driven support groups like LED TV Repair Solutions or LED TV Software & Firmware.
A USB flash drive, formatted to (preferably 8GB or 16GB). The downloaded firmware file ( .bin file). Installation Steps Prepare the USB Drive: Format the USB drive to FAT32. Tp.mt5522.pc821 Firmware
The files are usually provided in a .rar or .zip format, which must be extracted to produce a v55228k_8g.bin or similarly named file. Step-by-Step Installation Guide (USB Update Method) For a specific firmware download for this board,
Use a high-quality USB drive (8GB to 16GB). Format it to FAT32 with a 4096 allocation unit size. Tp.mt5522.pc821 Firmware