I heard one can connect their Xfinity cable box to a HDMI input on a computer monitor to watch tv on their pc. I don't have an actual HDMI input, however, I do have a HDMI to DVI cable and tried that: cable box to HDMI cable to converter cable to DVI input on monitor. I got a message on the monitor that says input not supported. I tried the same connection with a Roku stick and was able to view videos (no sound of course). Any ideas why the Xfinity box won't work?
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