" firmware; search their site for the specific 1366x768 Zephir variant.
for related boards like the CV338H-C42, which can sometimes be cross-compatible if the panel resolution matches. Download CV338H U42 1366x768 ZEPHIR part1 rar
This community often shares All Resolution Upgrades " firmware; search their site for the specific
Place the extracted firmware file (usually named allinstall.bin or similar) in the root directory of the USB. Flash: Turn off the TV and unplug it. Insert the USB. Download CV338H U42 1366x768 ZEPHIR part1 rar