iPhone 11 Series
| Problem Description | Symptoms | Solution | Source |
|---|---|---|---|
| Bootlooping. | - Firmware flash may succeed but does not fix the problem. - Firmware flash may fail at 19% - May get error 4013. | - Commonly caused by the proximity sensor, if unplugging this fixes the problem it will need replaced. - Can also be caused by a bad charge port flex or battery. | |
| No backlight or low brightness. | Apple logo visible on start. | Proximity sensor determines brightness if auto brightness is enabled, sensor will need to be replaced. |