I have a very strange phenomenon. I got home today and neither of my Tivo remotes work. I have a SIR 4120T on code 1 and a HR10-250 on code 2. The remotes both work from 12-18 inches away from both receivers but no further. I have replaced the batteries. It is almost like there is some kind of interference jamming the remotes, but the TV portion of the remote works fine. Anyone have any ideas what I might be dealing with here?