If I have the Roku set up on 1 tv, is there a way I can go off the same Roku box for the other tv???
You will need a seperate Roku device for each TV or move the 1 Roku device to each TV you wish to watch. You cannot watch multiple TVs with 1 Roku device at the same time.
I do have same smart tv but code says its invalid
Same as what smart TV? This thread is about an unspecified non-smart TV.