I bought a HiSense 50" 4K TV at CostCo two years ago; I wanted a 43" but that was all that was available. It does not allow you to view the HDMI ports until it

I bought a HiSense 50" 4K TV at CostCo two years ago; I wanted a 43" but that was all that was available. It does not allow you to view the HDMI ports until it is setup; setup requires an internet connection. I don't have it any more.