Thanks for posting in the Slingbox answers forum! I'm sorry to hear you are not able to view the full image when connecting to your Slingbox PRO on your computer.
I have seen in most cases that this is a computer issue. If you tried connecting from a different computer, I am sure it would work fine. When an issue like this happens, it usually means you need to update the NVIDIA Driver in your PC.
The thread below proves this to be a resolution:
Hope this helps!
The Sling Moderation Team