Select or Update Now to download and install the latest version directly over Wi-Fi. Via USB (Official Support):
If you are looking for a standard software update to fix bugs or improve performance, use the official built-in methods provided by Toshiba: Download TOSHIBA 65U7750 Panel K650WD7 LF330 part3 rar
Navigate to > Support (or Device Preferences/About ) > Software Update . Select or Update Now to download and install
You must have every part (Part 1, Part 2, etc.) in the same folder to extract the firmware successfully. Download TOSHIBA 65U7750 Panel K650WD7 LF330 part3 rar
Visit the official Dynabook (Toshiba Support) Portal and enter your specific model number (65U7750) to see if a downloadable USB update is available.