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Insert the USB into the TV and navigate to > System Update > Local Update . Risks of Third-Party Firmware
Finding a specific "part3.rar" file for firmware typically indicates a split archive from a third-party site, which can be risky. Official TCL firmware is usually provided as a single .bin or .img file and is rarely hosted on public websites for direct download. Safe Methods to Update Your TCL TV Download TCL LED40S4900 Firmware part3 rar
: Firmware varies by region and chassis version (e.g., RT51A). Installing the wrong version can cause panel errors or permanent damage. Insert the USB into the TV and navigate
Copy the provided .bin or Update.img file to the root directory of the USB drive. Download TCL LED40S4900 Firmware part3 rar