Dell CFG-18180895 Owner's Manual page 52

Feature
Processor
Processor fan
Service mode jumper
Password clear jumper
RTC reset jumper
Internal speaker
Intruder connector
Power connector
Table 30. Controls and lights
Feature
Front of the computer
Power button light
Drive activity light
Back of the computer
Link integrity light on integrated network
adapter
Network activity light on integrated
network adapter
Power supply diagnostic light
52
Specification
1151-pin connector
4-pin connector
2-pin connector
2-pin connector
2-pin connector
4-pin connector
3-pin connector
One 8-pin for PSU, one 4-pin for CPU, one 8-pin for
SATA power
Specification
White light — Solid white light indicates power-on state;
slow blinking white light indicates sleep state of the
computer.
White light — Slow blinking white light indicates that the
computer is reading data from or writing data to the
hard drive.
• Green — a 10 Mbps connection exists between the
network and the computer.
• Green — a 100 Mbps connection exists between the
network and the computer.
• Orange — a 1000 Mbps connection exists between
the network and the computer.
• Off (no light) — the computer is not detecting a
physical connection to the network.
Yellow light — A blinking yellow light indicates that
network activity is present.
Green light — The power supply is turned on and is
functional. The power cable must be connected to the
power connector (at the back of the computer) and the
electrical outlet.