Many thanks for the reply, Dave. I forgot to mention that I tried reversing the normals as well. I tried again just now while turning 2 sided lighting off as you suggested and it's the same (please see attachment). Flat color, no texture.

(When I reverse normals only then does it turn black indicating the normals were originally the right side up)

I also tried loading it up in both windows and mac. Same problem.

It works when I recreate the object from scratch using similar UV's, the same shader network and the same image file. I guess this means it's definitely a problem with the object itself. However there are dozens of objects that are not working and I don't have enough time to sit and recreate them all. (The deadline looms)

Thanks again. I appreciate your help.