If you're having some issues with audio out of your Slingbox and everything else seems fine, check out this article linked below:
Hope this helps!
Sling Media Forum Moderation Team
I changed my DVR cable boxes.
I have audio, but no video now.
The cable box does not have the blue-green-red outputs.
I tried running the coax directly into the Sling box, and also from the
output of the DVR into the input of the sling box.
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I use my PRO-HD everyday, it works great.
Today, it has a constant static noise, along with regular audio and picture is perfect.
I tried changing audio cables, re-set the slingbox, still have the static noise.
I even have it on shows that I've recorded (DVR), and when I pause a show it is still there..