While holding the button, plug the TV back in. Release the button when you see the "Upgrading" screen or a blinking LED. Service & Engineering Menu
For your Smart TV, keeping your firmware updated is essential for performance and app compatibility. You can update your firmware through a standard network update or manually using a USB drive if your TV isn't connecting to the internet. How to Update via Network (OTA) This is the easiest method and recommended for most users. Press the Home button on your remote. Navigate to Settings (gear icon) in the top-right corner. Firmware TCL L43S6500
To ensure compatibility, you must open the back cover of your TV and locate the sticker on the main motherboard. Look for codes such as: While holding the button, plug the TV back in