2nd tuner has bad reception issues on DirecTV TIVO Series 2. Already determined it's not the cables, etc. (swapping cables- problem does not follow) I've read all over that it could be the power supply. However, I've replaced two caps (16v 2200mf ones) and still have same problem. Before I start on another board with the same problem, I thought I would ask to see if it is a cap problem or something else. Thanks