Ok! Thanks to all. I have a 50-135 that stopped working two years ago. I tried in vain to get it to work on my K3 and considered converting it to screw drive. Well, after reading this I thought why not dig it out. Nothing to lose! So I mounted it on my K1 and set the auto shut down to 10 minutes. Walked away. A short time later I came back and tried this cure. After several attempts and no response I moved the Af/Mf switch on the lens several times and got a sound! Went to live view and continued to work with it. Hesitant at first, but now fully functional!
I'm amazed! Miracles do happen.
Color me happy, Ray