: If your TV is stuck in a boot loop and cannot access the internal menus, you should contact Toshiba Support with your serial number and main board code to request a specific USB recovery package. 2. USB Update Preparation

: Since your file is part of a split RAR archive, ensure all parts (part1.rar, part2.rar, part3.rar) are in the same folder on your computer. Extract the first part; the extraction software will automatically pull data from part 3 to create the final firmware file (usually ending in .bin or .pkg ).

: Move the extracted file directly to the root directory (not inside any folder) of the USB drive. 3. Installation Procedure

: Search for your model number on the Toshiba TV Support Portal to find the latest verified firmware and manuals.

: For many 4K models, official firmware updates are hosted on the Dynabook Support site .