When I import Nikon RAW, JPEGS or file TIFFS while importing they show the photo briefly and the image becomes black in the Library mode. This issue just stared to happen. FJ
Please follow the below steps if you see black images after importing in Lightroom:
2. Restart Lightroom and then import images again
That did the trick! Thank You sooooo much.
You are Welcome, Glad to help.