When you stated you disconnected the HDMI cable from your HDD recorder, with the Slingbox connected, did you power cycle the HDD recorder by unplugging the HDD recorder and then plug it back into a power source?
If this step was not performed, the video ports on the HDD recorder may still be shut off. I would recommend to unplug the HDMI again and then power cycle to the HDD recorder.
This should restore the video through the Slingbox.
If this is the case, then then HDD recorder cannot have a HDMI cable and a Slingbox connected at the same time.
Here is an article that explains this more:
- When I connect my set-top box to my TV with HDMI connections, I can't stream video at all using any version of SlingPlayer. Why?
Hope this helps!!
Sling Media Moderation Team