ONKYO HTS3400 Intermittent Audio Problem

Hi, I just hooked up Onkyo HTS3400 with my Sony KDL-55EX620.
My connection is very simple as follows:
I have only one HDMI cable connected from Cable Box to ONKYO CBL/SAT IN-Jack, then Onkyo OUT-Jack HDMI(V1.4) cable to SONY TV (ARC). I have set ARC to Auto.
I have others Components like PS3, DVD Player, DVR etc connected directly to TV's HDMI input, but I have been able to use Onkyo TV/CD input Selector to receive Audio through the Receiver. However, very often, if I switched input selector to CBL/SAT and back or change SONY TV's input selector and the sound from TV/CD input selector just dropped with no sound coming out at all until I have to power off the Receiver and back on a few times to get the sound back. I have no problem with sound coming out from CBL/SAT input selector.
What seems to be the problem?
Is there any setting I need to look at?

ONKYOUSA,
Can someone reply and help with this one?