LG G4 Camera and Call Have Stopped
I've had the same problem. I even called the service. I did several factory resets, all to no avail.
After all that, I just left the phone with the battery out over the night and in the morning, I was about to send it to the service, but thought to open it once more. The phone worked. All I can think of is that it has some capacitor problems.
Anyway the phone worked for about 2 months. Now I have the same problem once more.
Let's hope that the night will solve the problem again.