iPhone 6s camera issues

[Nicholas221078]

Hi.

One day my rear and front camera decided to get the dreaded black screen.

I replaced the front camera assembly and still the same , I disconnected the rear camera and everything started working with the selfie camera, thinking it was the rear camera at fault I got a new rear camera and installed it, then the phone wouldn't turn on at all.

I removed the new camera and the phone started working again without any rear camera installed, I put the old rear camera back in and now the selfie front camera and rear are black screened , I can only get the front to work with the rear camera disconnected.

In short new rear camera stops the phone turning on,old rear camera gives black screens , no camera allows everything to work apart from flash etc.

Any ideas

Thanks