Chosen Solution
I got an IPhone 11 after charging IC replacement, got black spot at the bottom of the screen. Ive checked the reading of diode mode at FPC connector all shown normal value. Already changed Light IC, but the iphone still give the same result. Also i reball the layer board twice but still the same. Ive tested with brand new LCD May i Know the common issue for “dim backlight” repair ?
Azim-boy, if you have measured the resistances at the video port and these seem okay, you still have the voltage value to prove (the basics of microelectronics are reminiscent of). Therefore, replacing anything, including what you called light.IC, makes no sense. Replace the screen or at least check the connections in the screen connector.
