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I then wired this to the ribbon cable and hooked the power connector into another running machine. HOWTO: Supplies: To make the cable I used a DB25M TO IDC10 SERIAL connector. They look like this: The header is found on the motherboard directly to the left of the south bridge.Here is how the header pins are numbered: Here is a table showing which header pins should be connected to what parallel pins. Here's what my cable looks like (Note: it looks like the power lead is connected to the DB25 but in fact it is solder to the ribbon, it goes to pin 1 on the header) If you use a cable similar to mine, open it up and desolder the ribbon from the connector.
To get the ~3V, I took a pass through power connector from an old case fan and added three diodes to the 5V wire, giving me a little over 3V.After a lot research I stumbled upon a few pages (linked at the bottom) that documented the type of cable necessary and the software to use this port to reflash the bios.The cable consists of a parallel connector wired to something you can plug into the pins that also has a 2.7V-3.6V input to power the chip while reflashing it.If you only tried the USB option for crash free then you should try floppy or CD.The CD that came with your mobo also has the base rom on it and you should be able to use that as well (or burn yours to a cd). I had the exact same problem a couple years back (but I didn't use the Windows App) and since it was still under warranty I just sent it back because if I had pulled my rom I would have voided my warranty.
There have been scores of people with the same issue, if only I had known before hand. In perhaps a moment of great stupidity and laziness, I reflashed the bios on my ASUS P5B Deluxe using the ASUS windows based flash utility.