Thanks for posting in the forums! I'm sorry to hear you are having video issues when connecting to your Slingbox SOLO.
Could you please respond telling us what the brand and model of the A/V source you have connected to the Slingbox? As a troubleshooting step, I would recommend hard resetting the Slingbox to factory settings, then going through the online setup at setup.slingbox.com. This may resolve the issue.
Also, what is the operating system of the computer you are having this issue on?
Below is link to an article from our support site that explains how to reset your Slingbox to factory settings:
Hope this helps! Feel free to reply.
The Sling Moderation Team