I went inside my thinkpad, cleaning it, removing BIOS chip, doing a flash with clean ME. Because I had bad ME and it wouldn't flash from Windows. Then I deflux everything.
Turns out dock connector on motherboard is rusted out inside. Individual copper strands on connector are gone. Covered in green crap, and gone after I cleaned the green crap.
Anyway to get this connector from somewhere other than a donor mobo?

I'm guessing to remove it, I'd need to remove some other connectors from the bottom, or find a bottom preheat and take it through the cycles up to 250C, and then hit it from the top with 150C. I don't have a bottom preheat yet, so will have to take off other plastic connectors on the bottom and just use a heat gun.
Attached is a BIOS with clean ME, best working version. Leaving it more for myself in case I'd need it in the future and lose it locally.