David,
Are you using the R1487 code in Nevo Studio (you have to use 'Model Based Setup' to get it)? Once you add this code, go to the 'mynevo.com' tab in the 'Devices' pane and see if you can find wht you are looking for.
There are also hex codes for the Power On and Power Off functions in the 'files' section of this site that can be added into to NevoStudio.

[Link: remotecentral.com]