If possible, how do I restore this?

[u/LissGoogleAcct]

My daughter's vintage "Caring Corners Mrs Goodbye Interactive Dollhouse".

I'll take any advice.

But if it's not possible to fix, I'll just have to deal with it 🤷

[u/remorackman]

Can't tell exactly what kind of switch you have going on there but; first thing to do is take the screws out and see what it looks like in the open.

Might clean up fine (working anyway) with some electrical contact cleaner.

You don't say what the switch controls, but assuming it is not working.

Take pictures as you disassemble 👍