Dell OptiPlex 780 Setup and Features Information Tech Sheet (Desktop, Mini-Tow - Page 8

Drives (continued) Internally accessible: 3.5-inch SATA drive bays Available devices: 2.5-inch SATA hard drive (with brackets) 3.5-inch SATA hard drive 19-in-1 Media Card Reader 5.25-inch SATA DVD-ROM, DVD+/-RW, or DVD/CDRW combo drive Mini-Tower - two Desktop and Small Form Factor - one Mini-Tower, Desktop, and Small Form Factor - two Mini-Tower - two Desktop and Small Form Factor - one Mini-Tower and Desktop - one Small Form Factor - one (slimline drive) Mini-Tower - two Desktop - one Small Form Factor - one (slimline drive) Control Lights and Diagnostic Lights Power button light Green light - Solid green light indicates power-on state; blinking green light indicates sleep state of the computer. Amber light - Solid amber light when the computer does not start indicates a problem with the system board or power supply. Blinking amber light indicates a problem with the system board. Drive activity light Green light - Blinking green light indicates that the computer is reading data from or writing data to the hard drive. Network connectivity light Green light - A good connection exists between the network and the computer. Off (no light) - The computer is not detecting a physical connection to the network. Diagnostic lights Four lights located on the front panel of the computer. For more information on the diagnostic lights, see the Service Manual available on the Dell Support website at support.dell.com/manuals.