Need help. Reboot and Select proper boot device or insert boot media in selected boot device

Ugh so I took out my video card power cord to help my son with his computer. Put cord back and I am getting reboot and select proper boot device or insert boot media in selected boot device and press a key.

Running opencore - Catalina

Thanks in advance for any help.

submitted by /u/royalbrigade
[link] [comments]