The iPhone 6 camera and flashlight were not working, likely due to a software issue rather than a hardware problem. To fix it, the repairperson first checked the flashlight by measuring the power supply chip U1602, which was outputting normal voltage. They then found that the I2C bus connecting the flashlight power supply chip had become disconnected. Reconnecting the I2C bus from the rear camera socket to the flashlight power supply chip solved the problem, restoring the camera and flashlight functionality.

1. iphone 6 Camera and Flashlight was not working?
Here is Fix
If your phone camera and flashlight haven't function,
except hardware problem you can pay attention to the
software. If you are not professional repairman, you must
ensure that you know some professional knowledges.
Now I will recommend to fix iphone 6 camera and
flashlight.
Trouble Phenomenon:
According to the customer’s feedback, iPhone 6 camera
cannot be used and the flashlight cannot be opened.
Repair Process:
The damaged flashlight often causes the problem of
an unworkable camera, so we check the flashlight.
1. First measure whether the power supply of flashlight is
normal. We find the power supply of flashlight is output
by U1602 through its circuit diagram, as shown in
picture 1-1 and material object is shown in picture 1-2.

2. 2. After measurement, the work voltage of flashlight
power supply chip U1602 is normal. After analyzing the
circuit diagram of U1602, we know that I2C bus controls
the work of flashlight power supply chip U1602 (picture

3. 1-1).
3. Remove flashlight power supply chip U1602 and
measure the diode data to ground of I2C bus solder pad
of pin E2 and D2 which is infinite. That suggests that the
I2C bus of flashlight power supply chip disconnects. I2C
bus still connects the rear camera’s socket.
4. Measure the diode data to ground of rear camera’s
socket which is normal. Thus the circuit on the board of
flashlight power supply chip U1602 solder pad
disconnected. Jump a wire from the rear camera’s socket
to flashlight power supply chip U1602 solder pad and
then assemble flashlight power supply chip U1602, as
shown in picture 1-4 and 1-5.

4. 5. Assemble iPhone and get into IOS to test. The function
of camera and flashlight is normal. Trouble is removed.