Hydraulic hoses to snowblower BX5450 not working

My BX2370 has a 50" snowblower and the hydraulic hose does not work when attached as recommended; the joy stick normally should lift'lower the blower attachment by pushing the joystick up or down, but these controls did not work. So I switched the hoses from the blower quick attach unit onto the other available hydraulic quick connects on the tractor, and I can make the blower lift up and down by pushing the joystick to the left and right. I can conclude I think that the 2 hoses to the quick connect and snow blower is working, but the hydraulic hose from the tractor, that is controlled by the forward and downward motion of the joystick is not working. The hydraulic hoses from the tractor for these controls is blocked or broken. Can I fix this myself, or do i need to have the dealership come out to do this work? I have a LA243 front loader with four hydraulic hoses that were working OK this past summer before I put on the snow blower and its quick attach unit with the 2 hydraulic hoses on it. Thanks.