Download Msd6a638 T8e2 Toshiba 43u7750 170207 Zip Here
If it's for a fix, I can try to help you narrow down the best version of this firmware.
Disclaimer: Firmware flashes are done at your own risk. Ensure the main board ID ( MSD6A638-T8E2 ) matches exactly before applying. Download MSD6A638 T8E2 Toshiba 43U7750 170207 zip
Are you looking to update for or just to fix it? If it's for a fix, I can try
Always try to backup original flash data if possible. If it's for a fix
Usually, the file is placed on a FAT32 formatted USB drive, which is then plugged into the TV, and the power is cycled while holding the power button or menu button to initiate the loading process (sometimes known as MstarUpgrade.bin or similar).
42.5" Toshiba 43U7750 - Specifications - DisplaySpecifications