Dell OptiPlex 755 User Manual page 38

Key Combinations
<F12> or <Ctrl><Alt><F8>
<Ctrl><p>
Controls and Lights
Power control
Power light
hard drive access light
Link light (on front of chassis)
Link integrity light (on integrated
network adapter)
Activity light (on integrated network
adapter)
Diagnostic lights
Standby power light
Power
DC power supply:
Wattage
Heat dissipation
Voltage
Backup battery
38
Mini Tower Specifications
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
push button
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.)
green
solid green light indicates network connection
green light for 10-Mb operation; orange light for 100-Mb
operation; yellow light for a 1000-Mb (1-Gb) operation
yellow blinking light
four lights on the front panel (See "Diagnostic Lights" on
page 347.)
AUX_PWR on the system board
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