Hi, there. Thank you for posting this. You’ve given me the courage to repair my own Keon, as I think it’s having the same problem. I have the outer case off and it looks like I have more screws to remove before I can get at that rod. Do you know, perchance, what types of screws these are? I thought they were hex/Allen, but I can’t get any of my imperial or metric ones to fit. My eyes aren’t the best. Anyway, thanks again!
EDIT: I figured out they are Torx T10s, and not all of them need to be removed. Just the ones holding on the circuit board and 4-6 near the bottom of the device.
In my case, the coupler was undamaged and the coupler had simply become separated from the threaded rod. I had ordered a new coupler in anticipation of replacing mine, and it came with an Allen key to tighten the set screws, which hold the threaded rod and coupler together. So, I just moved the rod back into place and tightened the set screws up, and put everything back together. It’s working fine so far!