We have had the DCX3510-M for about a week now and have to admit defeat.
All the instructions state that setting up a user favourite list enables those channels to appear in the guide. I can only get the full guide to show.
The favourites only appear in that weird mini-bar which only shows the programs that are active (re-phrase that: programs that I have missed). I want to see upcoming program times for the next few hours for my selected channels.
Another question: To save wasted button presses, how do I remove the unwanted favourite lists such as HD, Kids, Sports, Comedy, Reality, etc....
So far my opinion of this new box: Some good features, but mostly very retrograde. If it wasn't for the recording capability I would be back to my old box in a flash.