I haven't tried with the camera unplugged, but I have tried with it disabled in crowsnest, no change. It did fail not too long ago with no filament loaded, so that excludes an extruder issue.
The Klipper install is relatively new so I don't want to go that route just yet. I bought a new cable, but when I went to install it, realized that I had a nice Anker cable being used for my klipperscreen device and a random Chinese cable for the printer board (the Anker cable was longer so I blindly used it for the klipperscreen device). I swapped the Anker cable over to the printer, and changed it to a USB 3.0 port instead of the 2.0 it was on, and have the test print running now. We'll see how this goes, I guess!