Dell PowerEdge 2500 Leitfaden

Dell™PowerEdge™2500SystemsInstallationandTroubleshootingGuide

Introduction

Indicators, Messages, and Codes

Finding Software Solutions

RunningtheDell™Diagnostics

Troubleshooting Your System

Installing System Board Options

Installing Drives

Getting Help

Jumpers and Connectors

Abbreviations and Acronyms

Figures

Tables

Notes, Notices, Cautions, and Warnings

Information in this document is subject to change without notice.

©2000DellComputerCorporation.Allrightsreserved.

Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, PowerEdge, Dell OpenManage, and DellWare are trademarks of Dell Computer Corporation; Intel is a registered trademark of Intel Corporation; Microsoft, MS-DOS, Windows NT, and Windows

are registered trademarks of Microsoft Corporation; Novell and NetWare are registered trademarks of Novell, Inc.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its

own.

Initial release: January 2001



NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

CAUTION: A CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

WARNING: A WARNING indicates a potentially hazardous situation which, if not avoided, may result in severe injury.

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Jumpers and Connectors

Dell™PowerEdge™2500SystemsInstallationandTroubleshootingGuide

Jumpers—AGeneralExplanation

System Board Jumpers

System Board Connectors

SCSI Backplane Board Connectors

Interposer Board Connectors

Disabling a Forgotten Password

This section provides specific information about the jumpers on the system board. It also provides some basic information on jumpers and switches and describes the

connectors and sockets on the various boards in the computer.

Jumpers—AGeneralExplanation

Jumpers provide a convenient and reversible way of reconfiguring the circuitry on a printed circuit board. When reconfiguring the system, you may need to change

jumper settings on the system board. You may also need to change jumper settings on expansion cards or drives.

Jumpers

Jumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects the

pins and creates a circuit. To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated. FigureA-1 shows an example of a

jumper.

Figure A-1. Example Jumpers



A jumper is referred to as open or unjumpered when the plug is pushed down over only one pin or if there is no plug at all. When the plug is pushed down over two

pins, the jumper is referred to as jumpered. The jumper setting is often shown in text as two numbers, such as 1-2. The number 1 is printed on the circuit board so that

you can identify each pin number based on the location of pin 1.

FigureA-2 shows the location and default settings of the jumper blocks on the system board. See TableA-1 for the designations, default settings, and functions of the

system's jumpers.

System Board Jumpers

FigureA-2 shows the location of the configuration jumpers on the system board. TableA-1 lists the function of these jumpers.

Figure A-2. System Board Jumpers



WARNING: Make sure the system is turned off before you change a jumper setting. Otherwise, damage to the system or unpredictable results

may occur.



Table A-1. System-Board Jumper Settings

System Board Connectors

See Figure6-1 and Table6-1for the location and description of system board connectors.

SCSI Backplane Board Connectors

FigureA-3 shows the location of the connectors on the back of the SCSI backplane board.

Figure A-3. Connectors on the SCSI Backplane Board



Jumper



Setting



Description

PASSWD

(default)

The password feature is enabled.

The password feature is disabled.

NVRAM_CLR

(default)

The configuration settings are retained at system boot.

The configuration settings are cleared at next system boot. (If the configuration settings become corrupted to the point where

the system will not boot, install the jumper plug and boot the system. Remove the jumper before restoring the configuration

information.)

ONCE



Reserved (do not change).

jumpered unjumpered

NOTE: For the full name of an abbreviation or acronym used in this table, see "Abbreviations and Acronyms."



Interposer Board Connectors

FigureA-4 shows the connectors and sockets located on the interposer board.

Figure A-4. Connectors on the Interposer Board



Disabling a Forgotten Password

The computer's software security features include a system password and a setup password, which are discussed in detail in Section 4, "Using the System Setup

Program," in the User's Guide. A password jumper on the system board enables these password features or disables them and clears any password(s) currently in

use.

To disable a forgotten system password or setup password, perform the following steps.

1. Open the front bezel (see "Removing the Front Bezel" in "Troubleshooting Your System").

2. Remove the system cover.

3. Refer to FigureA-2 for the location of the password jumper (labeled "PASSWD") on the system board.

4. Remove the jumper plug from the PASSWD jumper.

5. Replace the right-side computer cover, and then reconnect the computer to an electrical outlet and turn it on.

The existing passwords are not disabled (erased) until the system boots with the PASSWD jumper plug removed. However, before you assign a new system

and/or setup password, you must install the jumper plug.

CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions at the front of this guide.

6. Repeat step 1.

7. Install the jumper plug on the PASSWD jumper.

8. Replace the right-side computer cover, and then reconnect the computer and peripherals to their electrical outlets and turn them on.

9. Assign a new system and/or setup password.

To assign a new system password using the System Setup program, see "Assigning a System Password" in the User's Guide.

Back to Contents Page



NOTE: If you assign a new system and/or setup password with the jumper plug still removed, the system disables the new password(s) the next time it

boots.

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Abbreviations and Acronyms

Dell™PowerEdge™2500SystemsInstallationandTroubleshootingGuide

The following list defines or identifies technical terms, abbreviations, and acronyms used in Dell user documents.

NOTE:Unlessotherwisespecified,thesedefinitionsmaynotapplytooperatingsystemsotherthanMicrosoft®Windows®95 and Windows NT®.

ampere(s)

alternating current

ACPI

Advanced Configuration and Power Interface

ADC

analog-to-digital converter

ADI

Autodesk Device Interface

artificial intelligence

ANSI

American National Standards Institute

APIC

Advanced Peripheral Interrupt Controller

ASCII

American Standard Code for Information Interchange

ASIC

application-specific integrated circuit

BASIC

Beginner's All-Purpose Symbolic Instruction Code

BBS

bulletin board service

BIOS

basic input/output system

bpi

bits per inch

bps

bits per second

BTU

British thermal unit

Celsius

CCFT

cold cathode fluorescent tube

compact disc

CD-ROM

compact disc read-only memory

CGA

color graphics adapter

centimeter(s)

CMOS

complementary metal-oxide semiconductor

C.O.D.

collect on delivery

cpi

characters per inch

cpl

characters per line

CPU

central processing unit

DAC

digital-to-analog converter

DASH

Dell Advanced SCSI Host

DAT

digital audio tape

decibel(s)

dBA

adjusted decibel(s)

direct current

DIMM

dual in-line memory module

DIN

Deutsche Industrie Norm

DIP

dual in-line package

DMA

direct memory access

DOC

Department of Communications (in Canada)

dpi

dots per inch

DRAC

DellOpenManage™RemoteAssistantCard

DRAM

dynamic random-access memory

DS/DD

double-sided double-density

DS/HD

double-sided high-density

DSA

Dell SCSI Array

ECC

error checking and correction

EDO

extended-data out

EGA

enhanced graphics adapter

EIDE

enhanced integrated drive electronics

EMI

electromagnetic interference

EMM

expanded memory manager

EMS

Expanded Memory Specification

EPP

Enhanced Parallel Port

EPROM

erasable programmable read-only memory

ESD

electrostatic discharge

ESDI

enhanced small-device interface

ESM

embedded server management

Fahrenheit

FAT

file allocation table

FCC

Federal Communications Commission

FIFO

first-in first-out

feet

gram(s)

gravities

gigabyte(s)

GUI

graphical user interface

hexadecimal

HIP

Hardware Instrumentation Package

HMA

high memory area

HPFS

High Performance File System

hertz

I/O

input/output

ICBM

inter-chassis management bus

identification

IDE

integrated drive electronics

IRQ

interrupt request

ISA

Industry-Standard Architecture

JEIDA

Japanese Electronic Industry Development Association

kilo-(1024)

kilobyte(s)

KB/sec

kilobyte(s) per second

kilobit(s)

Kbps

kilobit(s) per second

kilogram(s)

kHz

kilohertz

LAN

local area network

pound(s)

LCD

liquid crystal display

LED

light-emitting diode

LIF

low insertion force

load number

lpi

lines per inch

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