Chassis intruded... fatal error.. system halt..

If your case is not setup for chassis intrusion, the motherboard has dropped a jumper.
The location is by the last PCI slot between the CD audio connector and the USB bus plug. (it is right next to the CLRTC jumpers)

Good luck

Hello download a manual here at ASUS:

http://www.asus.com/Motherboards/Intel_Socket_775/P5KPLAM/#download

First select your windows
Then select manual and hit global for download
Unzip the file before you can read it
You probably need a Pdf reader

Yes the bios have a setting for this READ THE MANUAL
The chassis intruder is a safety precaution
To prevent unautorized access to the mainboard
when the case is opened (a contact does this)
The wire can be removed from the mainboard
And the settings can be set off in the bios.
So the problem doesen`t shows up again.

Good luck