I didn’t read through the thread but I bought an mki from a friend and any movement of the OT would reboot it. I ended up taking a risk and slightly squishing the tubular power adapter plug with a pair of vice grips (as you can set their closed ‘depth’ by tightening them over the plug’s end, remove the plug, and then tighten them just a hair more) so I didn’t accidentally totally smush the thing. It hasn’t done it in a year since, but your mileage may vary. For me, it was obviously just a loose contact at that specific point.
I was super bummed at first…