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Roku Ultra not working with active care

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Installed several new active hdmi cables, all video sources go through Control4 video matrix for some reason Rokus are causing all screens to go black in and out regardless of source playing

When I use old hdmis they work 


anyone have any ideas?

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I don't have a video matrix, but I had this same problem with active HDMI cables and my Roku Ultra.  Is your Roku set to "auto detect display?"  If so, try changing it to a fixed display type.  That solved my problem.  As an aside, I did have a similar "in and out black" problem with my Oppo UDP-203 and my active cables too.  I solved it pretty much the same way.

Active HDMI cables are kind of a pain, but the Key Digital balun they replaced in our house was an even bigger pain. That thing never passed HDR signals properly, even though Keystone tech support swore up and down that it would.  But I digress....

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