Multiple monitors display settings cannot be reset

I'm on Windows 10. Sometimes I connect my TV to my desktop to watch shows online from my couch. I connected the HDMI to my desktop and the screen was mirrored but nothing appeared on the TV. When I tried to fix bugs, I pressed Show on Monitor 2 and the image was moved from my main monitor to my TV, which is still blank. So when I connect to my TV, I lose all the pictures. I can only reset this setting when the HDMI is connected, but then I cannot see.

How can I reset all display settings to fix the original problem?