Interesting, without the jumper installed in any of the positions the PCIRST# pin on the USB controller is left floating, meaning that it can possibly randomly flip on its own. As the VT6202 is a PCI device that lives on the PCI bus it was potentially messing up the bus, causing the board not to work.

As we're talking about the UK, if there is a disruption in the bus, the default action of the bus driver is to stop it and call the police. 😀

I just watched your video on repair on this motherboard. It seems like the information on TRW site should be updated with important note on those absurd jumper settings.

I wonder how many of these motherboards were trashed because someone had fumbled one of these jumpers and couldn't get it to start again