If yours is the same as mine, it is spring loaded to open. The motor just allows the spring to open at a comfortable speed. The motor is there mainly for retracting the awning. Because you hear a noise, for me, the motor is working. This tells me:
1. the spring is broken or one end has come loose.
2. the motor clutch is broken.
The parts manual is at https://www.dometic.com/f9d11d84-4d4...a57b526f.fodoc
Be very careful. If the spring is good, whatever is keeping the awning from deploying could give way. The awning will deploy suddenly, without warning and with considerable force. I've had my awning apart several times for a variety of parts replacement.
1. You will need to get the awning open to remove the screws holding the awning in position on the awning rail.
2. Once the screws are removed, wire tie the awning closed.
3. Slide the awning off the awning rail. You'll need to cut the motor leads.
4. Do all work on a bench.
While not rocket science, except for the two wires for the motor it is all mechanical and pretty straight forward. The hard part is you may need to remove the fabric from the roller tube. If this is the case you may have a difficult time getting the fabric back onto the roller tube so the awning will retract straight. I had a terrible time the last time I did this.
On this repair, parts cost a fortune and labor is relatively cheap. Consider letting an experienced tech do the job.