Receivers and Audio Components

I just received my "repaired" Sony receiver from Best Buy. I connected all of the cables as usual but when I finally powered the unit on, there was/is no sound.

I have used all of the troubleshooting tips included in the manual but nothing works. Can you help me understand what's happening?

Little bit more detail, I connected a DVD player to the receiver using an optical cable. The indicator lights on the front of the receiver displays that the 6.1 Audio is activated and kicking. However, no sound.

hi
have a superb ud-m3, but............! the cd is not working, it loads and unloads but will not read the cd cant hear any motor , has anyone an idea? would happily replace the whole cd unit (cr2nl, but cant find any!!)any help greatfully accepted.
thank you roland

hi i have the above system and it suddenly stopped working it wont turn on. The stand by / on off button is flashing red instead of the usual solid red and it wont tun on when pressed. Everything is plugged in and was working in the same place a couple of days ago.
Just wondering if anyone knew what the problem might be
Any suggestions would be much apreciated