Lack Of Sound

[VRDUB]

So I bought the new Prodigy CD yestreday, dropped it in the cd tray, pressed play and Holy Crap, no sound. My normal listening level is around -20db, I only started to hear sound in and around -5db mark. Well at this point I'm already freaking out, and start to play around with the settings. Sub was OFF, so I turned it ON, and all of the sound was there. Switched it back OFF, once again muted sound. Played around some more, this time with the auto set-up EQ, and all is well again even with the sub ON or OFF.
Has anyone come across this problem before?
Thanks!

[cam]

Sometimes, if you are using an optical cable, it won't be fully inserted giving a momentary loss off sound. Optical cables are not known for having a great connector.

[VRDUB]

Well, I have only tried this during CD playback (analog RCA cables, old CD player). I played around with it again yesterday and this is what it did.

With EQ setting ON ( normal, front, flat,. etc.)
In Pure Direct Mode, Sub ON = full sound
In Pure Direct Mode, Sub OFF= muted sound

With EQ setting OFF
In Pure Direct Mode, Sub ON or OFF = full sound

I'll try with DVD playback (digital RCA) when I get a chance. I just think this is kinda weird. Has this happened to anyone else?

Thanks