The specific firmware for the (1366x768 resolution) used in Zephir LED TVs is generally found on specialized electronics repair forums rather than official manufacturer sites.
for related boards like the CV338H-C42, which can sometimes be cross-compatible if the panel resolution matches.
Use a FAT32-formatted USB drive (ideally 4GB or 8GB). Download CV338H U42 1366x768 ZEPHIR part1 rar
Installing the wrong firmware or losing power during the flash can permanently "brick" your TV. Ensure the panel resolution (1366x768) matches your screen's specifications.
This is another highly reputable source for the " CV338H-U42 The specific firmware for the (1366x768 resolution) used
Release when the standby LED starts flashing rapidly, indicating the update has started.
Do you have the for this TV, or are you trying to trigger the update using the physical buttons ? CV338H-C42 Software Download Free - Facebook Installing the wrong firmware or losing power during
Press and hold the button on the TV while plugging it back in.