Sony.yt - International Sony Forum

When I start camera it shows only black screen, but focus tap is working and front camera works too.

And it's hard to turn off flashlight without some manipulations.

I've read on some forums same problem and there was a solution, but only for Z3 compact.

They've made jumpers and it solve the problem.

But where do I find these on his big brother D6633?

Disassembly your phone and try to find them on the main board. Unfortunately there is no electrical components placing schematics so you must find them by yourself. But the first thing you should try - flash your phone with different firmware versions. If that will not help, it's hardware problem.