Are you using a TiVo or a V6? I'd guess a TiVo, but if you're not sure - check here
If so... on the front-left of your box there's a series of green lights. The second from left has a heart-symbol next to it, and indicates your "online" connection to the internet. It should be solidly on permanently - does this ever flash? Notably whenever your VOD drops out....
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