After the Iphone7 rear camera black screen upgrades the system, the front screen is also black screen.

After the iphone7, the camera has a black screen, which is a common problem of the 7 th generation.

A slight fall will stop the rear camera.

Most of these cameras are broken, just change them.

But after you upgrade, even the front screen is black, which means the problem is special.

Because the broken rear camera will not affect the front camera,

But the front and rear cameras are controlled by the host camera ic.

It is very likely that the camera ic is broken.

Disassembly test is more accurate.

I have been doing mobile phone chip maintenance, and I know these things better.

The picture below is a photo of the motherboard photographic ic, the small chip in the yellow part.