I am occasionally noticing some very slight pixelation followed by an occasional sound 'blip'. I'm not sure if it predominately happens on one or more channels, but when I caught it happening on one of my local channels I went to the diags screen and all tuners showed mid-high signals (93-100). How does one methodically try to figure this out. If someone can provide me with some ideas, I'd like to figure out why. I also should mention that my SNR numbers are usually 39-40ish range, but I haven't paid as much attention to that as the signal strength. Should I? Would a cable booster improve the issue or would it also boost any problems that might be involved? My cable comes into my attic and splits 3 ways (1 to AV cabinet, 1 to cable modem and 1 to 4 way spitter) The AV cabinet has a 2 way splitter, 1 to tuning adapter and 1 to Tivo. Cable is about 5 years old but heavy duty and was used for satellite install.