Hi I am having a problem with my sony bravia (KDL-40RD453) None wifi TV.

I have tried connecting it to the internet with manual setting to no avail, And also using the auto connect feature which says something along the lines like "connection found, Internet failed". I have a modern BT router which works perfectly with laptops and mobiles connecting to the internet. What options can i try to fix this as it should be as simple as plug in and play? The ethernet cable I am using works fine and the internets connection works fine.

Software is up to date running on, v8.513-1000

Thanks