Did some restarts of LR, restarted the PC, nothing changed.
Can anyone help? Please.
You either have a defective monitor profile, or a corrupted preview cache.
First, try setting the monitor profile to sRGB, if that fixes the issue, you should ideally calibrate the monitor with a hardware calibrator.
Press the Windows key+R, type colorcpl, and hit Enter.
Add the sRGB profile, then set it as Default profile. See screenshot (from Windows 7) below.
If this doesn't fix the problem, you have a corrupted preview cache.
Close Lightroom, then with Windows Explorer, go to the folder that contains your Lightroom Catalog (usually a folder named Lightroom inside the My Pictures folder.
Delete the Preview cache folder (ending with Previews.lrdata). Do not delete anything else.
Lightroom will rebuild the previews as you browse the library.
Thanks a lot. The problem was the missing monitor profile. Everything works fine again.
Hi. I am having the same issue. I am working on a Mac. Any suggestions? Thank you!