Not sure if this belongs in this thread or not, but a number of months ago I took the advice of this thread and used attenuators to fix my pixelation problem on both Tivo HDs (I have FIOS). All of a sudden this week, a large number of channels just won't tune at all. A few will bounce between not tuning and very heavy pixelation (huge RS Uncorrected errors). As far as I know, nothing changed in terms of the overall environment (although something could have happened with FIOS outside my house). I have a tech coming over tomorrow. Any advice on how to direct him? Thanks.