: Insert the USB into the TV, go to Settings > About > System Update , and select Local Update .
: This is the safest method as it automatically downloads the correct version for your specific hardware ID. Press Home on your remote and go to Settings . Select Device Preferences (or About ). Choose System Update > Network Update . Download TCL LED43S4900 Firmware part10 rar
Using incorrect firmware or unofficial split files can "brick" your television, making it unusable. Always verify your Chassis Number or Product Info (e.g., V8 or MT21) in the TV's "About" menu before flashing any manual updates. : Insert the USB into the TV, go
: Power off the TV, insert the USB, then press and hold the physical power button on the TV for about 10 seconds until the upgrade notification appears. Select Device Preferences (or About )
If you have obtained the correct, complete firmware file (after joining all RAR parts if using an unofficial source), follow these steps: : Use a FAT32 formatted USB drive.
: If your TV cannot connect to the internet, you should contact TCL After-Sales Support to request the official .bin or .img firmware file. Official files are generally not listed for direct public download on their main website. Manual Installation via USB
: Place the extracted firmware file (usually named Update.img or a specific .bin file) into the root directory of the USB drive—do not put it in a folder. Initiate Update :