Thanks for using answers.slingbox.com! I'm sorry to hear you are unable to connect to your Slingbox. It sounds like you are able to connect, but you're not getting a video signal.
After it gives you this black screen, if you tab on the screen, does it give you options, such as quality or remote? If it does, this means you are getting a connection, but are not getting a video signal.
Feel free to reply!
The Sling Moderation Team