Hello, we have a Dell R620 that keeps complaining about a chassis intrusion. This machine is safely locked up in a data center and nobody is near it. We'd like to just disable the alarm altogether, but can't figure out how. 

Reading here and other places online, there are several references to going into the BIOS in the security section and disabling the chassis intrusion there. But on this system with the latest BIOS, there is no chassis anything in the security section of the BIOS.

Any thoughts on how to do this on this system?

Thanks