DellDell PowerEdge R910 Technical Guide 144.3 Front Panel View and FeaturesFigure 2. Front Panel ViewThe following components and connectors are located on the front of the R910: Power-on indicator, power button USB connectors; connects USB devices to the system; two 4-pin, USB 2.0-compliant LCD menu buttons which allow you to navigate the control panel LCD menu LCD panel which provides system ID, status information, and system error messages Non-Maskable Interrupt (NMI) button Ambient temperature sensor System identification button Optical drive (optional) Hard drivesThe LCD panel is a graphics display controlled by the iDRAC. Error codes can be sent to the display byeither ESM or BIOS. See the Front-Panel Features and Indicators section in the About Your Systemchapter of the PowerEdge R910 Hardware Owner’s Manual on Support.Dell.com/Manuals for moreinformation.BIOS has the ability to enter a Secure Mode through Setup, which locks the Power and NMI buttons.When in this mode, pressing either button has no effect and does not mask other sources of NMI andpower control.The system control panel is located on the front of the system chassis to provide user access tobuttons, display, and I/O interfaces. See the Front-Panel Features and Indicators section in the AboutYour System chapter of the PowerEdge R910 Hardware Owner’s Manual on Support.Dell.com/Manualsfor more information.Features of the system control panel include: ACPI-compliant power button with an integrated green power LED (controlled by iDRAC6) 128x20 pixel LCD panel with controls Two navigation buttons One select button One system ID button Non-Maskable Interrupt (NMI) button (recessed) Ambient temperature sensor Two external USB 2.0 connectors