Release the button when the "Software Upgrading" progress bar appears.
Installing the wrong firmware can "brick" your television (render it completely unbootable). Always verify that your mainboard matches before proceeding. If your screen appears upside down or the colors are distorted after flashing, you may need to enter the Service Menu to adjust the Panel ID or Project ID settings. Download MT5510S PB782 CONDOR S43T5600 part01 rar
Plug the TV back into the power outlet while holding the button. Release the button when the "Software Upgrading" progress
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). If your screen appears upside down or the