OK after a bit of investigating last night. On the 2400ES display, it says OPT as the inpiut method for the SAT.
My TV receiver is plugged into my AMP with the Optical cable and that works (both in the TV OPT socket and the SAT opt socket). This I think rules out the AMP as the problem.
SKY is connected to my TV with a Scart lead and it is this sound that is transmitted to the AMP via the TV, so there is sound through the scart socket just not the optical cable.
Strangely there is power going to the optical lead as the red light at the end of the optical cable is on, it's just that no matter which input socket i plug it into, I get no sound.
So it looks like I may ahve to convince the wife that an ew bos is in order, and as we are getting a new box a HD box would be good
Ahh! ok. So you was getting audio from Sky via the TV, input to the tv using a scart. Sounds like you have the basic model of sky not the sky +, otherwise you could connect the optical out straight from the sky+ box to the amp input. As you are using a scart then effectively you are just getting stereo anyway. I would personally bypass the TV for sky audio and use the stereo phono outputs to connect to the amp. But as it was working ok before then I would say it's the TV settings that's the problem or scart lead.IMO. Regarding the red light at the end of the optical cable suggests that the TV transmitter is fine. Just be sure not to shine it directly in your eye.
No, no no, sorry i was misleading you there. SKY is connected to the TV via Scart, TV is connected to AMP via optical, hence can listen to SKY through the AMP on the TV setting (does that make sense?). I am not listening to SKY through the TV, and it is SKY+
Also have SKY optical connected directly to the AMP, but no audio output when select SAT channel on AMP.
So I know it's not the AMP as I ahve tested the SAT input with the optical from the TV and that works.
As for the redlight, that is coming from the SKY+ box but nothing is being heard from the AMP irrespective of the input I choose (be it TV, DVD or SAT)