How is the Slingbox connected to the DirecTV box?
If you are using Component cables, make sure you are using the Red, Blue, and Green video cables as well as the Red and White audio cables. Have a look at the image below to help connect the cables correctly:
Hope this helps!!!
Sling Media Moderation Team
I have directv; receiver is HR23-600; after 2 weeks of trying different combinations, the remote for HR23-700 now allows me to change channels. But still no audio. I can get audio on my computer from an internet page, but not with slingbox. Any one with ideas?