If your TV is stuck on the logo or experiencing software glitches, follow this general procedure:
: Combine all .rar parts and extract the binary file (usually named CtvUpgrade.bin or allupgrade_338_4G_1G.bin ).
: Channels like Kazmi Elecom are popular sources for specific CV338H firmware dumps.
Plug the TV back in while continuing to hold the button until the "Software Upgrading" progress bar appears.
: Format a USB flash drive (8GB or smaller is recommended) to FAT32 .
Firmware for these boards is typically hosted on specialized community forums and file-sharing groups. Note that because your file ends in part04.rar , you (part01, part02, etc.) for the extraction to work correctly.