It's likely that this is a hydraulic system.. mine is.
What you are probably hearing is the pump located under the stairs. There you will also find solenoids that control the direction of the pistons that run the slides, and it sounds like one either got stuck, or the control board has a failure. On that board are LOTS of LED's that show the incoming control status as well as the outgoing control command that runs the pump, solenoid, etc.
IF this is hydraulic, there is a procedure for manually pushing that slide in, but 1st you need to find those solenoid valves and open the bypass or you will get nowhere
This is on a Meridian, but these two are very closely related..
Also try asking this question on
RV Forums. This is the link to the Winnebago page and there are several there with your coach.