This may or may not apply to the customers situation, but I had a HDMI handshake problem with the 622 I had and my Pioneer a/v receiver, and had the same issue with no audio on SD channels but audio on HD channels. I run my home theater through my a/v receiver for sound and not the tv so this may be a bit different than the 222k and it's sound issue.
What I had to do for awhile was get a Digital Optical cable and run between the dish receiver and my a/v receiver and set my set-up to digital optical and then sound would come in on all channels.
If the dish receiver is hooked directly to the Phillips tv and the tv has a digital audio jack and a digital audio cable is available they could try hooking the cable between the dish receiver and the tv in the digital optical jacks and see if that takes care of the audio problem. I left the HDMI cable hooked up.
FYI; Pioneer did a firmware up-date and that took care of the problem I had.
I hope this is at least somewhat helpful.