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Desktop Board Features
17
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 3 describes the LED states when the
board is powered up and the LAN subsystem is operating.
Table 3. RJ-45 LAN Connector LEDs
LED Color LED State Indicates
Off 10 Mbit/sec data rate is selected.Green
On 100 Mbit/sec data rate is selected.
Off LAN link is not established.
On (steady state) LAN link is established.
Yellow
On (brighter and pulsing) The computer is communicating with another computer on
the LAN.
Speaker
A 47 Ω inductive speaker is mounted on the desktop board. The speaker provides audible error
code (beep code) information during the Power-On Self-Test (POST).
Battery
A battery on the board keeps the values in CMOS RAM and the clock current when the computer
is turned off. See Chapter 2 starting on page 21 for instructions on how to replace the battery.
Power Management Features
Power management is implemented at several levels, including:
• Software support:
Advanced Configuration and Power Interface (ACPI)
Instantly Available PC (IAPC)
• Hardware support:
Resume on Ring
Instantly Available technology
Wake from USB
Wake from PS/2 keyboard
PCI card wake up support