Blackmagic media express - preview screen is black

Blackmagic media express - preview screen is black when i am capture from source or trying to view what i am captured.

[Tony Rivera]

You don't specify what the capture device, source and source output is. This information would be helpful for others here to provide you guidance.

Generally speaking, the output of the device needs to match the formats mentioned on the tech spec page for that product in order to be seen in the preview window of Media Express.

Device is deckling duo and problem has been solved with graphic card driver reinstall.