[echecsqueen]

I guess it was just jammed. The electric connections were all in continuity and fine.

I don’t feel like a master mechanic at all. I still don’t understand why it was so hard to get the mechanism in and out. Maybe it is better to remove the window frame first but that idea seemed to be frought with additional risk of breaking brittle plastic things. I am glad it is done and will confess I am not going to open and close the windows more than necessary in the future.