Thanks for the information everyone. Because of your help I was able to determine it was indeed the lens and not the body. I decided to take the lens apart and and see if there was anything obvious, and indeed there was, the lens housing screws had pulled through the plastic housing. That is why my screw drive was recessed as per my pics. I took it all apart and put it back together and mounted it on my k-5lls and turned it on.....Can't tell you the relief that washed over me when F2.8 showed up on the screen!!! I took a few pics and changed the aperture to confirm it was working and all was well. Maybe it's just my pure relief but I swear those first few test shots were the sharpest I've ever seen from this lens!
I filmed what I did so I will try to create a video for others. Here is the
link to the document someone else produced that was intrumental in explaining how to tackle the task. BTW, I think the camera body is okay. I dropped the camera on my office floor which is carpeted so I think the lens took the brunt of the fall.
Thanks again!