Report "I have a TCL 55" TV. Model 55S405TLAA. Manufactured May 2018. Screen is black. I turn on and can hear the menu and audio. I did the flashlight test and can see the menu and settings. I have taken apart but not done anything further than the pic attached. I do not know if this is backlight inverter, or led strips? What is wrong, and what do I need? - Drew"