Some TVs start automatically; others require you to hold the on the TV panel until the "Upgrading" screen appears.
Before you attempt to flash this firmware, please verify the following to avoid "bricking" your TV: Download CV338H A50 1920x1080 EMMC Starsat part07 rar
If the TV doesn't see the update, try a different USB port or a smaller USB drive. Some TVs start automatically; others require you to
If the TV sticks on the logo after flashing, you may need to enter Recovery Mode to "Wipe Data/Factory Reset." After flashing, your original remote might not work
Firmware often comes with specific remote control mappings. After flashing, your original remote might not work unless it is the exact Starsat match.
Place the extracted file directly onto the USB (do not put it in a folder). The Flash Process: Turn off the TV and unplug it. Insert the USB drive into the TV's USB port. Plug the TV back in.
Knowing these details will help me ensure you have the right software for your specific panel.