We got the new box and it's the exact same box.  After spending about 2 hours on the phone with ATT support we found out they don't have any other boxes (why the other guy said this might help then is beyond me).  

We did try all that.  We scanned all HDMI settings, and even tried setting up with the colored cables.  They sent out a tech today and even he couldn't get it to work.  We have to return the TV.

It is really crazy that a brand new TV wouldn't hook up to the box...it's really messed up.