Camera video feed is black

Hello everyone,
I’ll preface by saying I have no experience with audio and visual. I’m part of a small church and inherited the responsibility of running the audio and video so I’ll try and describe my issue as best as possible.
Recently someone restarted the Black Magic board as well as restarted the IMac everything runs through. When everything came back up all cameras returned as normal except for two. These two cameras can be selected on the board and rotated. However the video feed is black. I check the multi view to ensure they were assigned correctly and they are.
What else should I check? I’m confused as to why I wouldn’t get video but can move the cameras without issue.
Appreciate your help! Thank you!
I’ll preface by saying I have no experience with audio and visual. I’m part of a small church and inherited the responsibility of running the audio and video so I’ll try and describe my issue as best as possible.
Recently someone restarted the Black Magic board as well as restarted the IMac everything runs through. When everything came back up all cameras returned as normal except for two. These two cameras can be selected on the board and rotated. However the video feed is black. I check the multi view to ensure they were assigned correctly and they are.
What else should I check? I’m confused as to why I wouldn’t get video but can move the cameras without issue.
Appreciate your help! Thank you!