Did you ever find a resolution to this problem? I have the exact same issue.
I can't seem to keep this board from waking up after a shutdown. It's annoying
because it lets the hard disk start to spin up but then cuts to power off. On & off
every 30 seconds or so. Can't be very good for the hard disk.
I updated to the latest BIOS 133, no change. Disable AMT, no change, turned off
any of the settings in the BIOS that would cause a power on (i.e. LAN), no change.
If you google this issue, you find a number of people who have this same issue but
Appreciate any help...