There is a button that toggle inputs on my monitor and the very thin top dome/bubble came off and not I can't really press it to work, though if I use a flat head screwdriver (the diameter of the metallic circle in the button), I can make it work but it's a real PITA to do it a few times a day. I couldn't fine any of these exact buttons but I have similar ones from another monitor that are just slightly different and I think the size/spacing is close enough to work but IDK how to test if this is the right kind of button or if it wil work at all.
I'm worried about fit, b/c it might be off 7-10 thousandth's in one direction and 3-5 in the other, but they are pretty darn close. I could always use some very fine wire and connect the button off the board b/c the monitors have been de-bezeled & on a custom mount so the boards are attached to the side of the mounting.
The biggest issue is connecting the lead the way they are needed and IDK how to test a button/switch like this. Here's a pic of the two boards and I labeled them as best I could. I showed where I touch the broken switch to get it to work and the line is the relative size of the flat head or angled tweezers I use.