ok so what happens exactly:

1. I'm currently on channel 10
2. I press channel up to go to channel 2
3. Tivo banner appears saying that I'm on channel 2
4. Screen goes blank then reverts to channel 10
5. If I press right arrow it says i'm on channel 2

P.S. I only just finished the guided setup about 1hr ago would this have anything to do with it? As usually you have to wait a couple hours before you can start recording.