Well, I found the motor and removed the cable. I also removed the two nut that hold down the assembly. Tried to yank it out but it still stuck to rod tube that the cable slide in. What to do next? Yank harder?

Also the manual operation to the motor stop working. At first, I was able to crank it open or close, but now doesn't work either way. There is a white pull on the assembly. How does this work? It seems to engage the gear.

John