plug the t-con cable into a hot one. how it was loaded

SONY KD-55XF8096 Chassis (Main Board): 1-982-626-21 If after the firmware it flashes yellow-green when turned on, there is no picture and no backlight. you need to turn it on without a panel, plug the t-con cable into a hot one. how it was loaded, configured and recorded a USB update from the site. after that it will work as it should.