
Also from the manual.
If you connect a component to a digital audio input, you
must assign that input to an input selector. For example, if
you connect your CD player to the OPTICAL IN 1, you
must assign “OPT1” to the “TV/CD” input selector.
Ahh right the HD cable goes direct into tv. Optical cable goes from sky to amp. Set sky channel to 171 Five HD and now there is a D light and also PLII light on. Does that mean its playing out in DD now?? Lol sorry for all the daft questions, i just want to get the best out of the system.
This is an Onkyo receiver right?
Do you have a "Digital Input" button on the front of the unit? You need to press that to switch from using HDMI to Optical for audio. That button will cycle betweem HDMI audio and whatever Optical port you assigned in settings.
I took a look through the manual of your Onkyo receiver and this option doesn't seem to have a dedicated button on the unit anymore.
Instead it looks like you need to press Receiver, then Audio on the remote and then find the AudioSelect option and change it to OPT (because the receiver gives priority to HDMI audio).
See page 35 of your manual.
Hope that helps.