Rj-45 Lan Connector Leds; Speaker; Battery; Power Management Features - Intel D850EMD2 Product Manual

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
Green Off
On
Yellow Off
On (steady state)
On (brighter and pulsing)

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 desktop board keeps the values in CMOS RAM and the clock current when the
computer is turned off.
See Chapter 2 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)

Advanced Power Management (APM)
•
Hardware support:

Instantly Available technology

Resume on Ring

Wake from USB

Wake from PS/2 keyboard

PCI card wakeup support
If the desktop board is used with an ACPI-aware operating system, the BIOS can provide ACPI
support. Otherwise, it defaults to APM support.
Indicates
10 Mbit/sec data rate is selected.
100 Mbit/sec data rate is selected.
LAN link is not established.
LAN link is established.
The computer is communicating with another computer on
the LAN.
Desktop Board Features
17