Object won't display graphic and freezes the program.

So I had a file that wouldn't display any graphic I applied to it but it would show as being applied. I could move it around but couldn't see anything. So I opened it up on Photoshop, Generated UVs (based on solution I found on here) and now when I try to apply the graphic it will just keep loading. I've let it run for about 45 minutes with no change.