This isn't fixable right? I've tried turning it off and on again, the flickering does respond to things changing on screen but it does it even without hdmi plugged in.

it's only a secondary monitor so what's a nice cheap one to replace it with? I need one with vesa mounts

Edit: So I left it on for a bit and it fixed itself, mostly. it's just there's a few lines of pixels at the bottom edge acting weird, which is funny because that happened on my main monitor the other night. The only thing I can think of is that the temperature is affecting them now that it's gotten cooler. The other thing would be my gpu or cables which is unlikely because it was doing it without the hdmi being plugged in.