Dell OptiPlex 755 Quick Reference Guide - Page 38

2 power button Press to turn on the computer. NOTICE: To avoid losing data, do not turn off the computer by pressing the power button. Instead, perform an operating system shutdown. See "Turning Off Your Computer" on page 13 for more information. NOTICE: If your operating system has ACPI enabled, when you press the power button the computer will perform an operating system shutdown. 3 Dell badge Can be rotated to match the orientation of your computer. To rotate, place fingers around the outside of the badge, press firmly, and turn the badge. You can also rotate the badge using the slot provided near the bottom of the badge. 4 LAN indicator light Indicates that a LAN (local area network) connection is established. 5 diagnostic lights Use the lights to help you troubleshoot a computer problem based on the diagnostic code. For more information, see "Diagnostic Lights" on page 66. 6 hard drive activity light This light flickers when the hard drive is being accessed. 38 Quick Reference Guide