Ford-New Holland L553 boom and bucket doesn't work

Hello! I'm trying to repair a L553 skid steer. The bucket and the boom doesn't moves. I checked all of the wires at the module, and seems ok. When I activate the seat switch, the leds timer and seat turns on, then I activate the seat belt swich, the led of the belt also turns on. But the machine doesn't starts, only stars on service mode. I has changed the module and the the problem persist... Any idea?? I'm coming crazy...

Ford-New Holland L553 boom and bucket doesn't work