[Elecraft] Transverters problem

[Dave Fugleberg]

I disconnected my K3 completely to move it. I have the 3 XV series
transverters and a p3.
Moved the k3 and transverters to a different spot and reconnected without
the P3.
All are powered through a rig runner.
When I apply power to the rig runner the K3 powers on by itself, which is
odd.
Everything seems to work including automatic switching of the transverters.
However when I try to power of the K3 with its power button, the K3 display
goes blank but it's backlight remains on.
After that, it won't power back up unless I remove and restore dc power to
the K3.
If I disconnect the daisy chained accessory cable from the k3 , the K3
powers on and off normally.
What gives?