Plug the TV back into the power outlet while holding the button.
Right-click Part 01 and select "Extract Here" using WinRAR or 7-Zip . Download MT5510S PB782 CONDOR S43T5600 part03 rar
Move all downloaded parts into the same directory on your PC. Plug the TV back into the power outlet
Once you have the extracted firmware file (usually named upgrade_5510S.pkg or similar): Download MT5510S PB782 CONDOR S43T5600 part03 rar
Use a drive 16GB or smaller, formatted to FAT32 .
Ensure your board is exactly MT5510S PB782 . Installing the wrong firmware can permanently damage the hardware.
Multi-part RAR files work as a single unit. You cannot use Part 03 alone.