Blank source monitor Premiere Pro CC 2018

In the source monitor, in the lower right corner, click on the wrench icon and confirm the video display is set to Composite Video and not Alpha.

MtD

More information needed for someone to help... please click below and provide the requested information

-Troubleshooting https://forums.adobe.com/thread/2261475

-Premiere Pro Video Editing Information FAQ http://forums.adobe.com/message/4200840

Do not count on Windows to be fully up to date when it comes to device drivers

Go to the vendor site to be sure you have an updated driver for your graphic adapter

•nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us

•ATI Driver Autodetect http://support.amd.com/en-us/download/auto-detect-tool

There are also intermittent reports that the newest driver is not always the best driver due to driver bugs or compatibility issues, so you MAY need to try an earlier driver version