[JimSpence]

If the DirecTV/TiVo unit is having a problem, it would show up on all channels. One thing to keep in mind is that the TiVo is buffering the channels. This recording and then playing back can exacerbate signal problems.

Check all cables/connectors for corrosion and moisture. Make sure they are tight and secure.

When these problems show, do a signal check to see if there is anything weird.