: Never turn off your TV or unplug the power during a firmware update, as this can permanently "brick" the device.
: Copy the extracted file to the root directory of the USB (not inside any folders). Download SANSUI UHDTVSNA43QX0ZSA Firmware part02 rar
: Insert the USB into your TV. Access the Settings menu and select the USB Update or Software Update option. : Never turn off your TV or unplug
: Always use official or reputable sources. While official firmware guides are available on the SANSUI FAQ page , third-party sites often host legacy or specific model files. How to Install via USB Download SANSUI UHDTVSNA43QX0ZSA Firmware part02 rar
If you are using a manual download like a .rar file, you will likely need to perform a USB update: