Move the extracted firmware file to the root directory of the USB (do not put it inside a folder). Flash: Turn off the TV and unplug it from the wall. Insert the USB drive into the USB 1 port. Press and hold the Power Button on the TV (not the remote).
Save "Download MT5510S PB782 CONDOR S43T5600 part01 rar" and all other related parts (Part 02, etc.) into the same folder on your PC.
(Check your internal sticker, typically Samsung or LG-based panels) File Format: .RAR (Split Archive) Content: Part 01 Installation Instructions (USB Method):
Release the button when the "Software Upgrading" progress bar appears.
Format a USB 2.0 flash drive (8GB or less recommended) to FAT32 .