Another day another boards. Lately getting a lot of iPhone backlight repairs. No backlight means iPhone still works and displays very faintly picture. On 6 Plus and 6S Plus sometime you have “half backlight”. You will a shadow in one of top corners of the screen.
Backlight often burns out when replacing the screen. Even with iPhone turned off, there is battery voltage going straight to LCD connector. That’s why you always want to unplug the battery before doing anything else. When unplugging the lcd, if it crosses the pins from backlight to ground you are creating a short that immediately kills filter.
There are also random backlight failures. Burned filter, bad booster chip, short on capacitor, bad diodes. When the filter burns out often it burns the pad that it sits on. At that point it’s necessary to run a jumper wire from another component that has the signal for backlight fuse. This is a delicate operation and a good repair to show microsoldering skills.
Here is one of the videos I made showing backlight repair:
If you are in need of iPhone or iPad backlight repair print this shipping form and it in for repair.
I just made new video showing the process of iPhone 6 Plus backlight repair. This iPhone was shipped from one of south Florida shops. Initially it came with no backlight at all. After checking the voltages on the connector I determined that potentially one of backligh boosters is out. Still, I was slightly confused why the I’m not getting half backlight since one line was showing 20v. I’ve replaced the booster and still had no backlight. At the end I had to replace both filters as well. iPhone was fully functioning. Check out the video of that particular repair:
If you have issues with your backlight print the shipping form and ship the phone for fast backlight repair.