Smart TV problem

It Was only very recently that I learned that TVs spy on you, by taking screenshots that are then used for targeted advertising. Like, they know what you are watching. So I use a big TV as a Computer monitor. Among other things, it "saw" a list of accounts / passwords in an unencrypted state (it's encrypted until such Times when I need to take a Look at it).
Do I need to change all my passwords?

I have blocked …

accounts advertising big computer encrypted list monitor passwords privacy problem screenshots smart smart tv spy state targeted advertising things tvs unencrypted