

I have a Geeetech i3 Prusa pro B
It has been running well, but to day for some reason the X axes will only move towards end stop and will not change direction.
I have changed the end stop in the firmware but nothing changed at all.
Then I changed the motor direction in the firmware but still the motor only goes in against the end stop only.
Even when I use the LCD control it only moves the X axes one direction against the end stop.
Does anyone have any ideas as what could be wrong ??