I'm having a weird moment.
From the PC, and from the RD6442G console, I can only make Z, or the bed, go down.
I can't get any up movement.

And I can't figure out why...

I have the two autofocus pens removed- whether that affects it or not I have no idea.

IN the end I got the bed back up by going into Vendor Settings, Read, then for Z, reverse polarity, Write, Exit, and then I could use the PC or the console to drive the bed back up to where I needed it.

Only the right arrow is working - the other one is as if it is not connected, as far as Z axis movement goes- from either the PC controls OR the console...

Any hints, reasonings, or real solutions would be appreciated, thanks!