Ender 5+ heats up, but won't print

The printer allowed me to set the temperatures for PLA printing, but when I told it to print, nothing happens.
It has firmware Ver. 1.70.2 BL. Could there be a motherboard issue? I even ran the PID autotune and updated those settings, but still no joy.

Does anyone have some suggestions?

Thank you!


Doesn’t the nozzle extrude consumables?

It doesn’t even move into position to start printing, much less extrude filament.

I might have found a problem. It seems when I take an STL file and process it with the Prusa slicer, it printed without difficulty. The same STL file processed by Cura caused the problem outlined earlier.
Now to explore the setting differences!