Open Part 1 with a tool like WinRAR or 7-Zip, and it will automatically combine the remaining parts.
Multi-part .rar files (like "part3.rar") are common on community repair forums because firmware files can be too large for single-file uploads. If you have already found a specific blog or forum thread: Download TOSHIBA 65U7750 Panel K650WD7 LF330 part3 rar
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, Open Part 1 with a tool like WinRAR
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