What are some troubleshooting options if the head section of my Hill-Rom® 70 Bed is not operating properly?

What are some troubleshooting options if the head section of my Hill-Rom® 70 Bed is not operating properly?
 

The control box or the actuator may be faulty. You can swap the foot and head connections on the control box to indicate which part needs to be replaced. Refer to service manual 151184.