I have just brought an Onkyo TX-NR609 receiver. I have an issue whereby there is a loud clicking noise when I change channels or switch to the guide if I have the HDMI Audio setting on my MySky HD box set to Dolby. If I change it to PCM it is fine but i do not get Dolby Digital Sound. My previous Sony reciever worked fine so it is obviously an issue with the Onkyo. Has anyone else come across this and found a fix. Using the Optical connection is not possible as I am using cat5 cables to feed sky to my TV which is in a different room than the sky box.