If you have successfully extracted the firmware from its multi-part RAR archive, follow these general steps for a manual USB update:
Official support for this model has transitioned over time. While Dynabook (formerly Toshiba support) provides official manuals and drivers for related models like the 39L4300U, the specific "EE" variant often requires searching regional or third-party repositories. Download TOSHIBA 39L4300EE Firmware part3 rar
Multi-part RAR files (e.g., "part3.rar") indicate that the original firmware image was too large for a single upload and has been split into several pieces. If you have successfully extracted the firmware from
: Insert the USB drive into the TV's USB port. Plug the TV back in. Depending on the specific software version, you may need to hold the Power or Menu button on the TV panel while plugging it in to trigger the "Updating..." wizard. : Insert the USB drive into the TV's USB port