I don’t understand what I did, but I found this YouTube video of a guy that ended up blocking one of the paths on a flex cord that was shorting out between the screen and T-Con … and it worked for my issue too.
Here is the link, in case anyone else has the unanswered problem similar to mine. I’m sure there is a more permanent fix with new parts, but I’ve spent enough time and money on this TV already, so I’m going to call it good.
https://youtu.be/tCknTVbZ3I8