Jetson Nano B01, no hdmi output

I have setup my Jetson Nano B01 in headless mode.

I now am working on setting up a usb wifi module according to instructions on the Internet.

The instructions say to connect a keyboard and monitor to the Jetson Nano. I connected a usb keyboard and a monitor using the hdmi port. I then connected 5v, 4A power with the barrel jack.

I waited for over a minute and the monitor said, “no signal”.

Any help would be appreciated.