Keep holding the button until you see a "Software Upgrading" progress bar or the standby light starts flashing rapidly. :
Insert the USB drive into the of the TV (use the port labeled USB 1 if available). Initiate Bootloader Flash : Download File KK.M368.A8-FHD-512M-4G-USB-BOOT.p...
: Use a reliable USB 2.0 drive (8GB or 16GB is best). Avoid USB 3.0 as some boards fail to recognize them during boot. File System : Format the USB drive to FAT32 . Keep holding the button until you see a
: Ensure the file name is exactly what the board expects (usually allupgrade_m368_4G_512M.bin or similar, depending on the specific recovery trigger). Installation Guide Prepare the USB : Avoid USB 3
Are you experiencing a specific or a physical symptom like a blinking red light while trying to flash this file?