There's photos of the TiVo & V6 in the link I posted above. I'll advise based on a V6, and have moved your post accordingly.
The EPG (TV guide) updates are fed (via your home-hub) over the internet, along with OnDemand & streaming services - a good test is whether those services also work. If not - your in-home connectivity is the problem.
Two arrows on a V6 indicates a loss of this connection, it sounds like yours is connected wirelessly. Follow Home > Help & Settings > Settings > Network, does a connection & IP address show in the top-right? I suspect it won't, and if so - that would be confirmation that a lack of wireless internet is the reason for your V6 issues.