The RAMPS 1.6 is the second RAMPS iteration released by BIGTREETECH. It replaces the original green power connector with a pair of screw terminals, adds a larger heatsink over the MOSFETS, and has a larger bed MOSFET. It maintains the surface-mounted fuses and flush MOSFETS of the RAMPS 1.5.
I found a short circuit between ground plane and servo+ line.