The Hitachi DVI (DVI-D) cannot get a handshake with the SA8010HD or the SA8300HD (via HDMI/DVI) cable. It is one of several HDTV makes with DVI input which cannot make the handshake with the SA DVRs.
At this point, the Videotron engineers have tried everything with me, using instructions from Scientific Atlanta. My SA8010HD was even downloaded with a temporary program to capture data while the connection was being attempted. Some 5 other clients participated in the same test as well.
The fault is not with your DVI-D cable. If you make the connection again, you may press "Guide" or "Settings" or access the diagnostic pages or even press "PIP" and in all instances you get data from the STB/DVR. What you are not getting is broadcast Video and sound because the HDCP card in your TV is version 1.0 and it cannot get a handshake with the SA's version 1.1. It could work with the SA3250HD or even a Motorola DVR but not with your present one.
Samsung LN52B750, SVS PB12-ISD, Harmony One, HD-A1, BDP-1400, Oppo DV-970HD, Yamaha RX-V371