Thanks everyone for the help. the only 3 pair DIP connector on the mb was flipped 90 degrees from the diagram on that document (thank you for the link though, appreciated). it was labeled though...

Shoot, turns out the two DVI connectors in use are both internal. Having trouble getting my pic of the mb out of iPhoto library, but the board says REV OJ, PCLDV0JCY3S024 AS#670960-001 product of...

Thanks for your reply Corsomyr, I don't know how to get the graphics card info without disassembling the machine, I plan to return in a week and take the HD out to copy so I'll see if I can get that...

Friends hp pavillion desktop (p7-1380t) got a new install (store bought usb) of windows 10 a week ago. Has two monitors both show no video (not just black, they scan their inputs find nothing and go...