Hi howarda
This kind of issue would fall outside our scope of support, as we would only be able to assist with programming the remote to control power and volume and that portion is already working. I'm not familiar with AV Receivers but after speaking with a few colleagues they said it sounds like the Onkyo receiver may have been selecting the input automatically. I'd recommend checking in with Sony to see if they can offer any advice. We have some additional info on Third-Party Support FAQs and Third-Party Support Resources. Hopefully we have other Community members who can chime in on this as well.