> Device Preferences > About > System update > Check for update . USB Method (Official)
Release when the standby light begins to blink rapidly or a progress bar appears. Download TOSHIBA 65U7750 Panel K650WD7 LE330 part2 rar
Format a USB drive to FAT32 and place the extracted file in the root directory (not in a folder). Initiate Flash: Unplug the TV from power. Insert the USB drive into the USB 1 port. > Device Preferences > About > System update
Before using a manual .rar file, it is safer to try the built-in update methods provided by the TV's operating system (Android TV for this model): Initiate Flash: Unplug the TV from power
The "part2.rar" extension indicates the firmware was split into multiple parts for easier hosting on tech forums or file-sharing sites. You will likely need "part1.rar" in the same folder to successfully extract the full firmware file.