…The iPhone 6 that we had showed signs of life but no display. After replacing the screen with a new one, it still showed no signs of an image. When inspecting the screen in front of a flashlight, a faint image was visible. This confirmed that the phone was on and in fact worked, but had a blown back light. For this type of repair it would require micro soldering. After checking the filters on the motherboard we found them to have continuity and functioned within specifications. At this point in the back light circuit we still had a back light display BGA IC (ball grid array integrated circuit) as well as a coil and a diode. After checking the coil, which was also found to be within specifications, we then looked to the diode. Below is the picture of the diode under the cpu heatsink.