The power buttin on my TV broke. Here is a simple replacement using thin printed springs. I'm using what i think is PETG, it should also work in ABS, but i'm less sure about how it will work in PLA. since the spring is thin, it may be OK.

Offered here as an example, you'll probably need to customise it for your needs. added a screw hole, to fix a dome on the other side, but haven't used it.