On the touchpad, there are about 6 icons not lit and non functioning to touch. Is this the control board or a control panel issue. A 316576620 vs 318280427.
You will want to check the connection of the ribbon harness that goes between the control board and the control panel to make sure that there is no corrosion on it. If this checks ok then the issue would be with the control panel part number 318280427.