Cold Start Goes wrong Direction (no replies)

Help.

I have a very strange repeatable problem. I'm running Marlin 2.0 on a Cohesion 3d Remix board (LPC1769) with all A4988 drivers. It works almost flawlessly and I'm really liking it but... when I first power on it seems completely random as to how axes move.


Example: after power on if I run my Y axis (dual) it usually has the motors out of synch and nothing moves. Homing the Z axis goes the wrong direction.


Specific steps: G0X5 will go to the left. Then G0X0 will also go to the left. Then G0X5 will go to the right! After this the axes all move correctly.


It's not my axis settings or my endstops because after the hiccup it works flawlessly. G28 does a great home and G28axis all do the right things and G0X,Y,Z all go the right direction. Only at powerup does this happen. Is it possible that a port pin isn't being initialized or ???

It could be my configuration I suppose but note that at warm starts (hit reboot button and reload firmware) everything is correct, it is only when the power is first turned on.

Anyone have any ideas what could cause this?

Thanks, Mark