I have a DTV HDVR2 Tivo receiver hooked up to DirecTV, valid account and all that but I have the weirdest problem... if I run 1 cable from the LNB to either sat 1 or sat 2, it works fine. But if I run 2 cables, the sat 2 line is intermittent and doesn't work. I can swap cables 1 and 2 as...

I recently had a Tivo unit die. It's an old Tivo that isn't being sold any more but it's fine for me and I wasn't looking to upgrade to HD - I just wanted my Tivo back working, so I bought a used unit thinking I could swap the power supply and bring it back to life (as I'd done before) however...