Hello again!

I am on the hunt for another piece of video equipment. I have not seen it before and I'm curious if it exists:

I'm looking for a video input box that will act as a video switcher for a source, a static image, and a blackout. the application being a satelite presentation "panic Button" where a presenter can just have a static image while switching between programs or show files, or while switching laptops. This is for the low budget or scarce crew kinda gigs.

Anyone have any ideas, processes or products (trying to avoid something like the ATEM Mini where its gonna waste 3 channels unnecessarily and has more buttons than the average joe can use)