My HDMI is no longer sending a signal GH5s

My HDMI is no longer sending a signal GH5s

The other day I was setting up a shoulder rig for my GH5S. I had it connected to a v mount battery with a EVF connected to the hdmi and powered via Dtap on the V mount battery. It was working at first but then when I tried to turn the camera on again nothing happened. I noticed when I unplug the EVF (via HDMI) the camera was able to power on.