Nikon P900 almost blank screen

[Jon Dumont]

Hi, suddenly at the weekend my P900 screen and viewfinder stopped showing images i was pointing at. If I take a shot the image is also blank.
1. I wonder if I have accidentally pressed something?
2. I then have tried a factory reset, but when looking at the manual or internet I have failed to locate the correct menu option on the P900 that matches any instructions on how to reset. Not sure this would fix it anyway.

I attach an image of the screen that fails to show any subject on the screen

I am a bit of a novice. Asking for help

 

[Woodyg3]

Check to see if exposure compensation has accidentally been set to a low, negative number. Or, are you in manual mode with a very high shutter speed and small aperture? Just a couple of ideas.