Chosen Solution
which board controls the lighting of the screen because you can see that there is power but dark only.. the screen is ok when tested on other iphone.
Hi, first did you do a cleaning on the board to remove corrosion? Did you desolder shields to access all chips and inspect for corrosion? You have a few components that can affect the backlight. First is backlight ic located next to the coil. Next is the coil, although it’s rarely the coil, and next js your backlight filter next to the lcd connector.
