Hello, The pj40 allows for fire stick to control volume and power on/off via ir code 4737, these features are also available on roku but roku devices do not allow for the manuel input of ir codes, instead roku uses preprogrammed codes specifically for tvs. I have found a work around for this by entering Vizio as the tv brand it allows for sound and power on/off on via roku remote.
u da goat been tryin to figure this out for months thanks pallywag
Anyone looking for similar solution for using the Roku to control a Nexigo Aurora Pro PJ92, use the CEC option and the Aurora systems TV selection. Doesn't work for IR with Aurora or Vizio, but CEC works with Aurora.