The contactors is on wrong side, the pin1 must connect to the arrow side(pin1). but in U1010 the connector is on the other side, So if you plug in the right way the signal won't go through, if you flip it to the other side and plug it in, the signal will go through but it's a wrong connect that's why the light is constantly on. The Toshiba HD ZIF connector is a special one, it got 2 way contactor so it doesn't matter which side you plug it in, as long as you plug the pin1 to the arrow (pin1).