Some cable TV set-top boxes with HDMI outputs dont deliver a picture to displays with HDMI inputs. What is the problem, and is there a solution?
In some cases, the set-top box software does not activate or support the HDMI port. In other cases, cable TV set-top boxes don’t work correctly when used in conjunction with an A/V receiver (but will typically function correctly when connected directly to a TV or monitor). Investigation of some of these devices reveals that this is caused by an error in the way these set-top box devices implement HDCP. Specifically, some of those boxes do not support “HDCP repeaters” (devices that pass along the signal to another device) such as an A/V receiver or switch. We believe that this may be a problem in the initial versions of these products, and in some cases there is new firmware available that fixes this issue in HDMI (newer versions may already have this fix). We have been actively working with manufacturers to resolve these problems. We suggest that users contact their cable operator and request the new software to address these issues. As noted above, cable operators are increasingly dow
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