Ok, you really want to avoid moving the Axis by hand and causing the LEDs to turn on… that is sending power back to the board. If you have to move the axis by hand, then do it slowly.
I think you may just need a bit more power going to your stepper motors…
See here for more info:
Note: you can have it set too low and you can have it set too high… click the little right arrow up there ^ and be sure to read the rest of the post and follow the links given.