Intel DX79TO User's Guide download pdf (Page 28)

Intel Desktop Board DX79TO Product Guide

System Initialization LEDs

At initial power on, these eight diagnostic LEDs are off. When the BIOS starts an

activity such as memory initialization, the corresponding LED starts flashing. Once the

activity has completed, the LED will remain on. Table 4 lists the LEDs and describes

thei

r function.

Table 4. System Initialization LEDs

Activity

Item/Callout

in Figure 7

LED

Color

Description

Watch Dog Timer Fire/

Back to BIOS

K Red When the watch dog timer fires to reset

the board, this LED will flash.

In addition, this LED will light and stay on

when the Back to BIOS button has been

pressed.

Processor Initialization G Green This LED will flash when the processor

initialization activity starts. Then the LED

will stay on when processor initialization is

complete.

Memory Initialization F Green This LED will flash when the memory

initialization activity starts. Then the LED

will stay on when memory initialization is

complete.

Video Initialization E Green This LED will flash when the video

initialization activity starts. Then the LED

will stay on when video initialization is

complete.

USB Initialization C Green This LED will flash when the USB

initialization activity starts. Then the LED

will stay on when USB initialization is

complete.

Mass Storage

Initialization

B Green This LED will flash when the hard drive

activity starts. Then the LED will stay on

when hard drive initialization is complete.

Option ROM

Initialization

D Green This LED will flash when the option ROM

activity starts. Then the LED will stay on

when option ROM initialization is complete.

OS Start A Green Just before BIOS transfers control to the

operating system, this LED will light and

stay on.

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Intel DX79TO User's Guide Page 28

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