I am trying to get HD using the above. It is a direct connection from the box (Explorer 3250) to the monitor.

I have DVI (the cable box) to HDMI cable with an DVI adapter (for the monitor) - and the DELL supports 720p resolution. Quote from their site:

"Video display capabilities (DVI playback) 480p/576p/720p (Supports HDCP)"

I have configured the 3250 box to the DELL monitor to exclude all resolutions except the supported 720. I have tested the cable box on a HDTV and it is working fine. All connections appear to be working except I get the message "The DVI / HDMI output is blocked...press exit to cancel" When I press exit, the following appears " Your HDTV does not support HDCP. Please use the YPrPb component to watch TV"

Any solutions/comments?

Any ideas what can be wrong? TIA.