Press and hold the button on the TV keypad (not the remote).
Firmware for this board is usually distributed as a .bin file or a compressed .zip / .rar archive. You can find reputable downloads on technician forums and specialized software databases:
Turn off the TV and unplug it from the power source. Insert USB: Plug the flash drive into the TV's USB port. Initiate Update: t.ms638.733 firmware
The T.MS638.733 motherboard is designed to bridge the gap between high-end 4K hardware and the Android operating system. Up to 4K Ultra HD (3840x2160) at 60Hz.
Offers free downloads for various brands using this board. Press and hold the button on the TV keypad (not the remote)
Download the correct firmware and copy the file (usually named allupgrade_ms638_733.bin or similar) to the root directory of the USB drive. Do not put it in a folder.
Use a high-quality USB 2.0 flash drive (8GB or 16GB) and format it to FAT32 . Insert USB: Plug the flash drive into the TV's USB port
Resolve frequent crashes, unresponsive apps, or UI lag.
Plug the TV back into the power outlet while still holding the button.
Typically equipped with 1GB RAM and 8GB ROM (eMMC storage).