@KBKM,

I would verify that you cannot turn them on in any way, such as by turning them on manually through the app first.

If this is the case, you would most likely want to get in touch with our support teams directly, as they will be able to quickly troubleshoot your behavior and process any replacements that are needed. I do not believe that I have seen this behavior before, especially if the camera is functioning as expected. 

When going through the process, it is likely that you would need to return the entire item. You can speak with support, but it is required that all parts be returend during the proccess. It is possible, either way, that you could get a more up to date version with a different mounting mechanism (however I do not think the C720 has ever changed its mount)