Go to a thrift store and buy a dumb TV. I bought a 32" dumb TV at the Salvation Army for $60. It's not a flat screen but is only 2" thick. It plugs into HDMI for my laptop and Nintendo Switch, has a nice (dumb) remote for volume and brightness, and has worked wonderfully for 3 years now.
The TVs have gotten a lot better in the last 10-15 years so even basic ones work great. I would have been thrilled to have this TV as a kid.