Quote Originally Posted by bichi View Post
Did a quick Google and found this article about "loose/bent pin" chassis intrusion jumper:
http://blogs.ittoolbox.com/windows/a...n-system-15608

If the jumper is not "loose" and verified it's over the correct pins: (see attached pic)
- unplug AC power
- CAREFULLY double-check intrusion jumper and pins for "tightness"
- check PCB mounting for odd shorts
- disconnect all USB devices, especially powered HUBs (in case of a "sneak-circuit" supplying +5sbvdc to intrusion circuit)
- clear BIOS with jumper (10sec)
- connect only keyboard and USB port if needed for flashdrive, else floppy
- reconnect AC power and pray

If all fails, guess its time to request replacement BIOS chip from ASUS Support?

Best of luck to you!

EDIT: just found more stuff using Google "ASUS intrusion" search term
http://www.digit-life.com/forum/0003/000387.html

clipped from above thread:
Dr Fat Chick - Junior Member
I had this problem with my brand new A7v333 and fixed it successfully:
If you look on the Asus web site you can find the fix tucked away in a faq - it suggests removing the existing jumper, rebooting (yes, you'll get the error but now correctly because the chassis alert pins are bare).
Now jump the pins with a NEW jumper cap (should ship with the board) and....huzzah!! immediate boot....at least that fixed mine.
It's still a bit worrying that this problem crops up on so many Asus boards though.
Nice find man hope this helps him out...