hey there - we've taken a break from banging our heads against this behemoth of a tv and decided to look for some folks who are much smarter than we are and see if we can't get some help. :) new here so assuming it's ok to just post a question in this manner. here goes: picture started doing...

I have an Onkyo HT-S5100 and I am I connected my TV to the receiver via an HDMI cable. Now I get video but no audio. I notice in the setup diagrams they show both a HDMI connection as well as stereo audio out from the tv to the receiver. Do I really need a stereo or digital out from the TV...