Just installed a Roamio Plus and a Mini. Everything looked good for a few hours, then the picture broke up, heavy pixilation. Tuning channels got either error V53 or V58. Tivo said the signal strength was too high, suggested an attenuator or getting the cable company to reduce the strength. Since I like the fast ethernet (20mb) I do not want the cable signal degraded. So I have ordered three attenuators (3db, 6db and 12db) to test. I then realized I have an old splitter, with each leg suffering a 3.5db loss, so I am now trying it - so far so good. I have 60 days to get it working or return for a credit from Best Buy and Tivo (lifetime). Does not say much for the quality of the Tivo tuners...never happened with cheap cable company boxes.