Copy the single extracted firmware file (not the .rar parts) to the root directory of the USB drive. Update TV: Power off the TV and unplug it. Insert the USB drive into the TV's USB port.

until the progress bar reaches 100% and the TV restarts.

Move all files into one dedicated folder on your computer.

Firmware for the CV338H-A42 board is often hosted on community forums or file-sharing sites like 4shared.

Once you have all parts downloaded (e.g., part1.rar through part4.rar ):

While specific board firmware is usually found on tech forums, you can check the Sanyo Support Page for official general updates. 2. Extracting the Multi-Part Archive