: Use the built-in system update tool to download the latest software directly from TCL. Navigate to Settings > Device Preferences > About . Select System Update and then Network Update .
If an update is available, follow the on-screen prompts to install it. Download TCL LED40S4900 Firmware part3 rar
to request the specific firmware for your model and region. Format a USB drive to FAT32 . : Use the built-in system update tool to
: If one part of a multi-part archive is missing or corrupt, the firmware will not install, or worse, could brick your TV . the firmware will not install
: If your TV cannot connect to the internet, you must obtain the official firmware from TCL support.