Unpacking and inventorying the equipmentAvaya CMS Dell R720 and R620 Computer Hardware Installation October 2015 17Computer layoutFamiliarize yourself with the layout of the computer.Item Indicator, Button, orConnectorIcon Description1 Power-on indicator,power buttonThe power-on indicator lights when thesystem power is on. The power buttoncontrols the power supply output to thesystem.Note: On ACPI-compliant operatingsystems, turning off the system using thepower button causes the system to performa graceful shutdown before power to thesystem is turned off.2 NMI button Used to troubleshoot software and devicedriver errors when running certainoperating systems. This button can bepressed using the end of a paper clip.Use this button only if directed to do so byqualified support personnel or by theoperating system's documentation.Dell R720 Front View