Press and hold the Power button on the TV panel, then plug in the power cord. Release the button once the LED starts flashing.
Use a USB drive (8GB or smaller is often more stable for flashing). File System: Format the drive to FAT32 . Download LDD M3663 A48 Sigma S32DN7 Backup Dump rar
Plug the prepared USB drive into the TV's USB port. Initiate Update: Press and hold the Power button on the