Dell OptiPlex 745 - Manual (Page 58)

Audio two connectors for line-in/ microphone and line-out;
two front-panel connectors for headphones and
microphone
System board connectors:
SATA two 7-pin connectors
internal USB 10-pin header for optional media card reader (3.5-
inch bay device)
Floppy drive 34-pin connector
Serial 12-pin connector for optional second serial port card
Fan 5-pin connector
PCI 2.3 two 120-pin connectors
Front panel 40-pin connector
Key Combinations
If you are running Microsoft® Windows® XP, brings
up the Windows Security window; in MS-DOS® mode,
restarts (reboots) the computer
or starts embedded system setup (during system start-
up only)
automatically starts the computer from the network
environment specified by the remote boot
environment (PXE) rather than from one of the
devices in the system setup Boot Sequence option
(during system start-up only)
or displays a boot device menu that allows the user to
enter a device for a single boot (during system start-
up only) as well as options to run hard-drive and
system diagnostics
Controls and Lights
Power control push button
Power light green light — blinking green indicates a sleep mode;
solid green indicates a power-on state.
amber light — blinking amber indicates a problem
with an installed device; solid amber indicates an
internal power problem (see
Power Problems ).
Hard-drive access light green
Link light 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 adapter) yellow blinking light
Diagnostic lights Four lights on the front panel. See Diagnostic Lights .
Standby power light AUX_PWR on the system board
Power
DC power supply:
NOTE: Power consumption can be zero when the
computer is unplugged.
Wattage 280 W
Heat dissipation 955 BTU/hr
NOTE: Heat dissipation is calculated based upon the
power supply rating.
Voltage manual selection power supplies — 90 to 135 V at
50/60 Hz; 180 to 265 V at 50/60 Hz
Backup battery 3-V CR2032 lithium coin cell
Physical
Height 11.4 cm (4.5 inches)
Width 39.9 cm (15.7 inches)
Depth 35.3 cm (13.9 inches)
Weight 10.4 kg (23 lb)