I have connected all cables and can see camera (Sony A7C) info but the screen is black. When I change to M mode not video I can see the image on both camera screen and DJI app but as soon as I hit record the screen goes black?

A7C cannot show in camera video image while recording on 4k.

If the problem you complain is about the shame of software and firmware that dji provided then keep waiting like everybody. We still have to do this stupid manual hack to enable on phone camera image with Raven eye.

DJI WAKE UP AND FIX THAT ...! And give us photo capture for A7C. That's a shame really!