Yes. You can manually remove the cover at the bottom of the pagoda that covers the temperature/humidity sensors and the remove the "cage" that houses the sensors. Both of these just clip in - no tools are required for removal. Once you've done this, you'll be able to see the aspirating fan.
When I received a replacement Atlas, my fan was also not running. It turned out to be an issue with the solar panels, not the fan. I simply removed the housing that holds the solar panels, removed and re-attached the electrical connector and straightened all of the wires at the connector and on the backs of the solar panels. After that, the panels sent voltage to the fan and the fan now runs. I can't guarantee that this will work for you, but it worked for me.