Plug the TV back in. Some boards require you to hold the Power button on the TV while plugging it in.
If the TV does not respond to the USB method, you will need an external programmer like the or Go to product viewer dialog for this item. . Download CV56CH D43 1920x1080 Guard Dump rar
Desolder the 8-pin Flash IC (usually 25Q64 or 25Q32) or use a testing clip. Plug the TV back in