TV upgrade surroundsound stopped working

Had a reg.TV hooked to a JBL ESC333 (Simply Cinema) 5.1 surroundsound. Was getting great sound. Upgraded to a Sony KDL-40Z4100 Bravia TV, (with same JBL system). Lost surroundsound in rear speakers. Can't figure.
Also thought I could plug router into TV and connect to internet, no luck. Can anyone help?

This particular tv does not have internet streaming capablities. The ethernet port is only used to display photos from your pc onto the tv or work with DLNA compatible media server software.
Im not really sure why your not getting sound out of the rear speakers. I would check the wiring and make sure you have good connections and that the polarity is right. If everything is ok It could be an issue with the powered subwoofer.

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