: HDMI, VGA, TV (Antenna), AV, and USB for multimedia playback/firmware updates.
If you encounter any issues during the firmware upgrade process: tvst2903 firmware upgrade
Do you have the or the current screen resolution so I can help you find the exact firmware version? General T.VST29.03 Firmware - Обновление ПО USB : HDMI, VGA, TV (Antenna), AV, and USB
Some tools allow you to read the existing firmware. Do this! If the new firmware fails, you can revert. you can revert.