The green lights are on on the Arduino, but the green light on the Ramps is flickering constantly. I have reset and re-uploaded the firmware, but still getting the same results. Does anyone know what would cause the screen to flicker like this? The light on the RAMPS seem to flicker at the same frequency. I was having a few endstop short circuits recently (may be the problem). I have those chinsy 3-wire endstops that short circuit if you plug them in the wrong way.
Any help would be greatly appreciated. Thanks!