I understand you have just switched providers from TWC to DirecTV, and you're having issues receiving video signals. Since you have already hard reset your Slingbox, you will need to reconfigure your inputs. Please visit this site to reconfigure the inputs for your Slingbox PRO-HD:
If you continue to have issues receiving video, please take a look at these articles:
- Slingbox.com - What video resolutions supported by Slingbox PRO-HD and SOLO?
- Slingbox.com - Fixing "No video signal" problems with Setup on Slingbox.com
Hope this helps!
Sling Media Technical Support