If the cutter grid isn't heating up and cutting the ice slab into cubes, unplug the ice maker and check the wire harness connections between the cutter grid and the electronic control board. Reconnect loose wires and repair broken wires. If the wires are okay, replace the cutter grid if its wires don't heat when activated. If you replace the cutter grid and it still doesn't heat, then you'll likely need to replace the electronic control board because the board isn't sending voltage to the cutter grid.
These repairs may help solve your freestanding ice maker problem
Replace the ice maker electronic control board
The electronic control board manages the various ice maker functions such as filling, running the compressor, and harvesting the ice. If the electronic control board is not operating properly, replace it.
If your freestanding ice maker stops making ice or doesn't work at all, the electronic control board could be the problem. This repair guide has step-by-step instructions for how to replace an ice maker electronic control board.
The cutter grid is below the front of the evaporator plate. When the slab of ice slides off the evaporator plate onto the cutter grid, the wires of the cutter grid heat up and cut through the ice slab for form square cubes. If the wires of the cutter grid are broken or don't heat up, replace the cutter grid.
If your freestanding ice maker sound like it's dropping ice but no ice cubes are in the bin, the cutter grid could be broken. This DIY repair guide shows how to replace an ice maker cutter grid in 15 minutes or less.