Dell OptiPlex 755 User's Guide - Page 38

Key Combinations or displays a boot device menu that allows the user to enter a device for a single boot (during start-up only) as well as options to run hard drive and system diagnostics displays the Management Engine BIOS Extension settings screen that allows you to modify the settings Controls and Lights Power control push button Power light green light - blinking green indicates sleep mode; solid green indicates power-on state. amber light - blinking amber indicates a problem with an installed device; solid amber indicates an internal power problem (See "Power Problems" on page 339.) hard drive access light green Link light (on front of chassis) solid green light indicates network connection Link integrity light (on integrated network adapter) green light for 10-Mb operation; orange light for 100-Mb operation; yellow light for a 1000-Mb (1-Gb) operation Activity light (on integrated network yellow blinking light adapter) Diagnostic lights four lights on the front panel (See "Diagnostic Lights" on page 347.) Standby power light AUX_PWR on the system board Power DC power supply: Wattage Heat dissipation Voltage Backup battery NOTE: Power consumption from an AC power source can be zero when the computer is unplugged from that power source. However, the computer draws a minute amount of power from the internal coin cell battery even when the computer is not drawing power from the AC power source. 305 W 1041 BTU/hr NOTE: Heat dissipation is calculated based upon the power supply rating. manual selection power supplies-90 to 135 V at 60 Hz; 180 to 265 V at 50 Hz 3-V CR2032 lithium coin cell 38 Mini Tower Specifications