My HDVR2 has been acting up, lots of incomplete recordings and glitches. I pulled the hard drive and ran the full diagnostics on it, it's fine. Turns out doing a signal test that the even transponders on the 2nd tuner either don't show up (while they are fine on the 1st tuner), or bounce between a good signal and 0. I swapped cables between tuner 1 and tuner 2, but the problem stays on tuner 2. I have done a clear and delete all, but that hasn't helped. I guess I could tell the HDVR2 that I only have one tuner, since this is a backup unit and I can live without 2 tuners. However, I'd really like to have the 2-tuner functionality. Is there anything else I can check? I swapped the cables both at the wall and on the back of the TiVo, so I can pretty safely rule out the cables or multiswitch/dish I would think. Thanks!