I'm sorry to hear you are having some trouble viewing the Slingbox while connected to the TV via HDMI, the following link will provide further information regarding using HDMI connections with the Slingbox and the TV: 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!
The Sling Moderation Team