Dell OptiPlex 740 - Manual (Page 171)

USB two front-panel and five back-panel USB 2.0–
compliant connectors
Audio two connectors for line-in and line-out; two front-
panel connectors for headphones and microphone
System board connectors:
SATA two 7-pin connectors
Floppy drive 38-pin connector
Serial 24-pin connector for optional second serial port card
Fan two 5-pin connector fans
PCI 2.3 124-pin connector
PCIe-X16 164-pin connector
Internal USB 10-pin connector
Intrusion switch 3-pin connector
Speaker 5-pin connector
Memory modules four 240-pin connectors
Power 12V 4-pin connector
Power 24-pin connector
Battery 2-pin socket
Front panel 40-pin connector
Key Combinations
in Microsoft® Windows® XP and Windows Vista,
brings up the Windows Security window; in MS-DOS®
mode, restarts (reboots) the computer
or starts embedded system setup (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 front of chassis - push button
Power light (within the power button) 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 front panel - green
Link light front panel - solid green light indicates network
connection
Link integrity light (on integrated network adapter) rear panel - 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) rear panel - yellow blinking light
Diagnostic lights front panel - four lights. See Diagnostic Lights .
Standby power light AUX_PWR on the system board
Power
DC power supply:
Wattage 275 W
Heat dissipation 938.85 BTU/hr maximum
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 9.26 cm (3.65 inches)
Width 31.37 cm (12.35 inches)
Depth 34.03 cm (13.40 inches)