The camera screen is black when on capture mode.

My camera had the same symptoms, and the problem was the stuck shutter. If you take off the lens and see the closed shutter then it's likely a stuck shutter problem like mine. My camera is working now and I see the sensor when the lens is off. I don't have a fix to recommend because the shutter retracted by itself when I accidentally dropped the camera on the floor while trying to take it apart. Perhaps someone has posted a proper way to fix a stuck shutter. Good luck. :)

"Hello,

It's not the lens stuck because I used NX 300 with manual lenses and I have the same problem. I restart the camera, restart the firmware and it does't work. I mean, all is working but I cant see anything and I can't push the button to try to do a picture.

Regards"

"Had same problem. First it showed Error01 and after that just showed black screen when taking pictures but everything normal when displaying pictures I have made before, setting menu etc.

The I have done a full reset of the camera. Same issue.

Then I have removed the lense (haven't done this for 3 years) and voila - there it was - the closed shutter. So I have taken my iPad Pencil and have manually pushed the shutter's guides a little bet and it has clapped back to normal position. Problem solved and stays solved."

"My camera had the same problem, tryed by replacing the battery, reinstalling the firmware.

At the end I found this a comment reporting that the issue has resolved with a slap on the camera side.

https://www.dpreview.com/forums/post/580...

I tried and after few slaps it worked."

"I had the screen flashing black for months, every time the camera was focusing.

I was still able to take photos in manual mode.

I then dropped my camera accidentally and it was permanently black.

I removed the lens, touched the mirror behind it, it moved a bit and now it works perfectly.

I’m quite perplexed."