Have you tried creating a new catalog in Lightroom and see if that helps.
You could also go to the File Handling tab of preferences and push the Purge Cache button in the Camera Raw Cache Settings section to see if that helps.
Thanks for the idea Akash.
I Was hopeful but it did not work.
I created a new catalog in a new folder and imported some new images. It behaves the same way
I also purged the Camera Raw Cache before this just to make sure
Thanks for this idea. It sounded promising. It did not affect the problem.
I purged Cache with my original catalog and with a totally new catalog with new images imported
Unfortunately this problem still persists.
I've dealt with a lot of software in my career but this problem has something unusual that I can not clear it after all that I have done/reset.
I am open t trying any new ideas.
I appreciate the suggestions. I tried resetting preferences a few times in the past. I tired it twice again, including a purge of the cache just for good measure.
This problem is still exists.
For what its worth I recalled that I have an older laptop with a copy of Lightroom 5 on it from the same source. Everything is working just as it should with the views of images in the Develop module
Do you think I am at the point where I need to remove any and all files related to LR 5 (including catalogs) and start an installation from absolute scratch
I do not see this as a catalog related problem as I used catalog backup from a month before the problem showed up and the problem exists when using that catalog.
Curious: what do you see if you toggle Before / After view, using the / (backslash) key while in Develop? Does this change how the image appears?
That is curious. I only get an image in the AFTER part not in the BEFORE part even if I start with a Raw file that has had no editing.
If I toggle the image after making a simple change to exposure (in develop) then both images are blank (grayed out). I seems to be acting as though the initial image is the latest image which might explain why it never changes when I move to the develop module.
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This could be caused by a defective monitor profile.
As a diagnostic tool and possibly a temporary fix, try setting the monitor profile to sRGB.
Go to Control panel > Color management, and set sRGB as the default profile.
If this fixes the issue, you should ideally calibrate your monitor with a hardware calibrator.
Thank you so much! The Profile was the issue. The sRGB Profile change got everything working. I do use ColorMunki to calibrate the monitors. Upon further inspection I noticed there were two color profiles for the monitor listed and the default one did not work. The other which should have been the default, worked as well when I made it the default. I have no idea where the extra, erroneous color profile came from - its not something I knew about or would have changed without knowing what I was doing. As a final step I recalibrated the monitors and all is now working fine in the DEVELOP module as I make changes.
Thanks to ALL that helped step me through these possible solutions and zero in on the final correction.
I am most grateful after fighting this for 5 days.