iPhone 6S Backlight Repair

Typically for a backlight to go out on the iPhone 6S would be a result of a few things, 1 being liquid damage on the motherboard causing corrosion and shorting out the backlight circuit which contains a diode, a backlight ic (U4020) as well as few other discrete components. Another way a backlight circuit can go out is also by installing a replacement screen and bridging a few of the connectors on the LCD FPC connection thus causing a short and ruining the circuit.

iPhone 6 Backlight Repair Service

A blown back light on an iPhone 6 is typically caused by a screen replacement gone wrong or a sudden drop on the phone which can damage some of the components on the backlight circuit.

Lets take a look at the back light circuit and evaluate the possible issues and solutions to this problem.

iPhone 6 stuck searching no service

The issue with the no service problem is that you cannot simply replace the Intergrate Chip with another one because it is married to the central processing unit (CPU) and the Touch ID controller. [Not to be confused with the Touch IC controller]