I connected the Cisco Board Pro 75" using a CAB-HDMI-MUL4K-9M cable, but when I try to share content, a black screen appears.I connected the Cisco Board Pro 75" using a CAB-HDMI-MUL4K-9M cable, but when I try to share content, a black screen appears.How can I fix this issue? I tried using a different cable, but the same problem occurred.
