Help-No surround sound

[Vince]

Hi,
I'm not all that familar with electronics and in desperate need of help.

I have a Sharp LC-42D64U TV, a PS3 and an Onkyo HT-SR800.

The problem is that before I bought my PS3, I had my PS2 connected to my system and the surround sound worked just fine for both the TV and PS2.

I had my future son-in-law connect my PS3 using HDMI cables and now I get surround sound from the PS3 but nothing when I'm watching TV. The front right speaker works and that's it.

Any ideas on what the problem might be or how I can reconnect my system for the surround sound to work regardless on what I'm watching. I would really appreciate it.

**Can't ask my son-in-law to help because they live too far away**

Thanks in advance