Screen Powering Down After About 20 Seconds

[MiG29]

I just purchased a Z5 and am having issues with the screen. Once I switch it on, the view stays up for about 20 seconds, then goes blank. I press the "Image" button and it comes back, but about 20 seconds latter, it goes dark again. Any thought?

 

[Needa]

C3 Power off Delay?

Manual can be downloaded here.
https://downloadcenter.nikonimglib.com/en/products/552/Z_5.html