Direct downloads for specific TV panel firmware files like are generally not available on official manufacturer websites. These files are typically used for "flashing" or repairing a TV mainboard to match a specific LCD panel and are often found on specialized technician forums or file-sharing sites. Official Methods to Update Firmware
Visit the official Dynabook (Toshiba Support) Portal and enter your specific model number (65U7750) to see if a downloadable USB update is available.
Flashing the wrong firmware or using a corrupted file can permanently "brick" your TV. Ensure the panel number ( K650WD7 LF330 ) matches your hardware exactly. For more specific guidance,