Dell Dimension U7021 Owner's Manual page 118

Controls and Lights (continued)
Link integrity light (on integrated
network adapter)
Activity light (on integrated network
adapter)
Diagnostic lights
Standby power light
Case front-panel light
Power
DC power supply:
Wattage
Heat dissipation
Voltage (see the safety instructions
located in the Product Information
Guide for important voltage setting
information)
Backup battery
Physical
Height
Width
Depth
Weight
118
Appendix
green light — A good connection exists between a 10-Mbps network
and the computer.
orange light — A good connection exists between a 100-Mbps
network and the computer.
yellow light — A good connection exists between a 1 GB
(or 1000-Mbps) connection.
off (no light) — The computer is not detecting a physical
connection to the network.
yellow blinking light
four lights on the back panel (See "Diagnostic Lights" on page 53.)
AUX_PWR on the system board
color options: off (no light), ruby, emerald, sapphire (default), amber,
amethyst, topaz, diamond (See "Changing the Front-Panel Light
Color" on page 14.)
460 W
931.2 BTU/hr
fixed-voltage power supply —1 10 V at 50/60 Hz
manual selection and auto-sensing power supplies — 90 to 135 V at
50/60 Hz; 180 to 265 V at 50/60 Hz; 100 V at 50/60 Hz for Japanese
computers
3-V CR2032 lithium coin cell
49.1 cm (19.3 inches)
22.2 cm (8.7 inches)
48.8 cm (19.2 inches)
19 kg (42 lbs)