Is the phone damaging the backlight on good LCD's?
I replaced the LCD for a customer and a couple of weeks later he reported the left side of the display to be dim. Note that the battery was unplugged during the repair and there were no signs of liquid or physical damage inside of the phone nor on the LCD prior to the initial repair or when he brought it back in.
I replaced that screen under warranty assuming that it was a defective LCD. The newest replacement LCD worked fine at first. But, a couple of hours later he reported the BL went out on the right side of the second LCD replacement.
I'm pretty sure I didn't have two defective LCD's both with BL issues. I tested the first replacement LCD on a tester phone and the BL was still out on it. It seems then that in both cases, I put a good LCD on the phone and that the phone somehow eventually damaged the backlights on each LCD. I've not experienced this particular issue before. Has anyone?
I have only seen BL circuit blown out from people not unplugging the battery during a repair in which case you see the backlight issue as soon as you connect a new screen. Or when the solder joints make contact with the back shield. Neither was the case in this situation.