My roku/vizio made it seem impossible to proceed without a connection and account. The workarounds I found online vary by model. I caved to avoid a fight. Even after a later reset, I couldn't figure out how to bypass it. I tried disconnecting it from wifi through the tv but it kept forcing me to connect it again, or else it wouldn't proceed. However, I changed the wifi password later and it was surprisingly quiet about it. It constantly flashes the power light when on now, but a little tape keeps it in check.