Firmware updates for these boards are usually performed by placing the extracted file on a FAT32-formatted USB drive, inserting it into the TV, and holding the power button while plugging the TV into a power source. Updating firmware is a high-risk procedure.
The file is a , which is a compressed format used to bundle large firmware files into smaller, manageable chunks for downloading.
: Once extracted, you should find a file typically named allupgrade_rt2831.bin or install.img . Installation & Risks