Extract the downloaded RAR parts using a tool like WinRAR or 7-Zip.
Ensure you have the exact match for your panel's resolution before flashing, as installing the wrong resolution can result in a distorted or blank display. Download CV338H A50 1920x1080 USB Tested part07 rar
Copy the resulting firmware file (usually named CtvUpgrade.bin or similar) to the root of a clean USB drive. Plug the USB into the TV's USB port while the power is off. Extract the downloaded RAR parts using a tool
USB Upgrade (typically involves placing a .bin file on a FAT32-formatted USB drive). Plug the USB into the TV's USB port while the power is off
Turn the power on; the TV should automatically detect the firmware and begin the upgrade process (indicated by a flashing LED or progress bar).
These firmware files are typically hosted on community forums or specialized technician repositories:
Resolving software hangs (like the "Android process has stopped" error), boot loops, or restoring original factory settings. Where to Find & How to Install