This did it! Thank you! I actually found this page and did the first half, not realizing there was more. I’m not confident I installed the exact correct driver, but I have dual screens in the proper resolution. This should get me by while I troubleshoot everything else.

Thanks again!

Instead of looking for a tv, look for a commercial display. They’re basically a computer monitor the size of a TV. Samsung makes a line that we use at work, and the cost is similar to a mid-range TV. They can function completely without internet.

Something like these: https://www.bhphotovideo.com/c/buy/commercial-displays/ci/35567/N/3538895735