Dell Dimension 4600C Bedienungsanleitung

Dell™Dimension™4600CServiceManual

Before You Begin

Technical Overview

Technical Specifications

Advanced Troubleshooting

System Setup Program

Removing and Installing Parts

Notes, Notices, and Cautions

Abbreviations and Acronyms

For a complete list of abbreviations and acronyms, see the Tell Me How help file.

IfyoupurchasedaDell™nSeriescomputer,anyreferencesinthisdocumenttoMicrosoft®Windows®operating systems are not applicable.

Information in this document is subject to change without notice.

©2003–2004DellInc.Allrightsreserved.

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

Trademarks used in this text: Dell, the DELL logo, and Dimension are trademarks of Dell Inc.; Intel, Pentium, and Celeron are registered trademarks of Intel Corporation; Microsoft

and Windows are registered trademarks of Microsoft Corporation.

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 Inc. disclaims any

proprietary interest in trademarks and trade names other than its own.

August2004Rev.A05

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 potential for property damage, personal injury, or death.

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

Advanced Troubleshooting

Dell™Dimension™4600CServiceManual

Diagnostic Lights

Beep Codes

System Messages



Diagnostic Lights



To help you troubleshoot a problem, your computer is equipped with four lights on the back panel labeled "A," "B," "C," and "D." These lights can be yellow or

green. When the computer starts normally, the lights flash. After the computer starts, all four lights will display solid green. If the computer malfunctions, the

color and sequence of the lights identify the problem.



CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Owner's Manual or Product Information

Guide.

Light Pattern

Problem Description

Suggested Resolution



The computer is in a

normal off condition or a

possible pre-BIOS failure

has occurred.

Verify that the computer is plugged into a working electrical outlet and that you have

pressed the power button.



Memory modules are

detected, but a memory

failure has occurred.

lIf you have one memory module installed, reinstall the module and restart the

computer.

lIf you have two or more memory modules installed, remove the modules, reinstall one

module, and then restart the computer. If the computer starts normally, reinstall an

additional module. Continue until you have identified a faulty module or reinstalled all

modules without error.

lIf available, install properly working memory of the same type into your computer.

lIf the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for

technical assistance.



A possible expansion card

failure has occurred.

1. Determine if a conflict exists by removing a card (not the video card) and then

restarting the computer.

2. If the problem persists, reinstall the card that you removed, remove a different card,

and then restart the computer.

3. Repeat this process for each card. If the computer starts normally, troubleshoot the

last card removed from the computer for resource conflicts (see "Resolving Software

and Hardware Incompatibilities" in your Owner's Manual).

4. If the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for

technical assistance.



A possible video card

failure has occurred.

lIf the computer has a video card, remove the card, reinstall it, and then restart the

computer.

lIf the problem still exists, install a video card that you know works and restart the

computer.

lIf the problem persists or the computer has integrated video, contact Dell. See

"Contacting Dell" in your Owner's Manual for technical assistance.



A possible CD/DVD or

hard drive failure has

occurred.

Reseat all power and data cables and restart the computer.



A possible USB failure has

occurred.

Reinstall all USB devices, check cable connections, and then restart the computer.



No memory modules are

detected.

lReinstall all memory modules and restart the computer.

lTo eliminate the possibility of a faulty memory connector, remove all memory modules,



Beep Codes



Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies

a problem. One possible beep code (code 1-3-1) consists of one beep, a burst of three beeps, and then one beep. This beep code tells you that the computer

encountered a memory problem.



Reseating the memory modules may fix the beep code errors in the following table. If the problem persists, see "Contacting Dell" in your Owner's Manual for

instructions on obtaining technical assistance. 



If you hear one of the following beep codes, see "Contacting Dell" in your Owner's Manual for instructions on obtaining technical assistance.



reinstall one memory module (if the computer supports a single module), and then

restart the computer. If the computer starts normally, move the memory module to a

different connector and restart the computer. Continue until you have identified a

faulty connector or reinstalled all modules without error.



Memory modules are

detected, but a memory

configuration or

compatibility error exists.

lEnsure that there are no special memory module/memory connector placement

requirements.

lVerify that the memory modules that you are installing are compatible with your

computer.

lIf the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for

technical assistance.



Other failure has

occurred.

lEnsure that the cables are properly connected from the hard drive, CD drive, and DVD

drive to the system board.

lIf the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for

technical assistance.



The computer is in a

normal operating condition

after POST.

None.

Code

Cause

1-3-1 through 2-4-4

Memory not being properly identified or used

4-3-1

Memory failure above address 0FFFFh

Code

Cause

1-1-2

Microprocessor register failure

1-1-3

NVRAM

1-1-4

ROM BIOS checksum failure

1-2-1

Programmable interval timer

1-2-2

DMA initialization failure

1-2-3

DMA page register read/write failure

3-1-1

Slave DMA register failure

3-1-2

Master DMA register failure

3-1-3

Master interrupt mask register failure

3-1-4

Slave interrupt mask register failure

3-2-2

Interrupt vector loading failure

3-2-4

Keyboard Controller Test failure

3-3-1

NVRAM power loss

3-3-2

NVRAM configuration

3-3-4

Video Memory Test failure

3-4-1

Screen initialization failure

3-4-2

Screen retrace failure



System Messages



3-4-3

Search for video ROM failure

4-2-1

No time tick

4-2-2

Shutdown failure

4-2-3

Gate A20 failure

4-2-4

Unexpected interrupt in protected mode

4-3-3

Timer-chip counter 2 failure

4-3-4

Time-of-day clock stopped

4-4-1

Serial or parallel port test failure

4-4-4

Cache test failure

NOTE: If the message you received is not listed in the following table, see the documentation for either the operating system or the program that was

running when the message appeared.

Message

Possible Cause

Corrective Action

8042 Gate-A20 error

The keyboard controller failed its test.

If you receive this message after you make changes in the system setup

program, enter the system setup program and restore the original value

(s).

Address Line Short!

An error in the address decoding circuitry in the

memory has occurred.

Reseat the memory modules.

C: Drive Error

C: Drive Failure

The hard drive is not working or is not configured

correctly.

Ensure that the drive is installed correctly in the computer and defined

correctly in the system setup program.

Cache Memory Bad, Do

Not Enable Cache

The cache memory is not operating.

See "Contacting Dell" in your Owner's Manual for instructions on obtaining

technical assistance.

CH-2 Timer Error

An error is occurring on the timer on the system

board.

See "Contacting Dell" in your Owner's Manual for instructions on obtaining

technical assistance.

CMOS Battery State Low

CMOS Checksum Failure

CMOS System Options

Not Set

CMOS Display Type

Mismatch

CMOS Memory Size

Mismatch

CMOS Time and Date Not

Set

The system configuration information in the system

setup program is incorrect or the battery charge may

be low.

Enter the system setup program, verify the system configuration, and

then restart the computer.

Diskette Boot Failure

Drive A or B is present but has failed the BIOS POST.

Ensure that the drive is installed correctly in the computer and defined

correctly in the system setup program. Check the interface cable at both

ends.

DMA Error

DMA 1 Error

DMA 2 Error

Error in the DMA controller on the system board.

The keyboard or system board may need to be replaced.

HDD Controller Failure

The BIOS cannot communicate with the hard drive

controller.

Ensure that the hard drive is installed correctly in the computer and

defined correctly in the system setup program. Check the interface cable

at both ends.

INTR1 Error

INTR2 Error

An interrupt channel on the system board failed to

POST.

The keyboard or system board may need to be replaced.

Invalid Boot Diskette

The operating system cannot be located on drive A or

drive C.

Enter the system setup program and confirm that drive A or drive C is

properly identified.

Keyboard Error

The BIOS has detected a stuck key.

Ensure that nothing is resting on the keyboard; if a key appears to be

stuck, carefully pry it up. If the problem persists, you may need to replace

the keyboard.

KB/Interface Error

An error occurred with the keyboard connector.

Ensure that nothing is resting on the keyboard; if a key appears to be

stuck, carefully pry it up. If the problem persists, you may need to replace

the keyboard.

No ROM Basic

The operating system cannot be located on drive A or

drive C.

Enter the system setup program and confirm that drive A or drive C is

properly identified.



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

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

Battery



A coin-cell battery maintains computer configuration, date, and time information. The battery can last several years.



If you have to repeatedly reset time and date information after turning on the computer, replace the battery.



To replace the battery:

1. Record all the screens in the system setup program so that you can restore the correct settings in step14.

2. Shut down the computer through the Start menu.

3. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut

down your computer, turn them off now.



4. Turn off any attached devices and disconnect them from their electrical outlets.

5. Disconnect the computer power cable from the wall outlet, and then press the power button to ground the system board.

6. Remove the computer stand, if it is attached.



7. Open the computer cover.



8. Locate the battery socket on the system board.



9. Remove the battery by carefully prying it out of its socket with your fingers or with a blunt, nonconducting object such as a plastic screwdriver.

10. Insert the new battery into the socket with the side labeled "+" facing up, and snap the battery into place.



11. Close the computer cover.

12. Attach the computer stand (optional).



CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Owner's Manual or Product Information

Guide.

CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the

manufacturer. Discard used batteries according to the manufacturer's instructions.

NOTICE: To disconnect a network cable, first unplug the cable from your computer, and then unplug it from the network wall jack.

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the

computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

NOTICE: If you pry the battery out of its socket with a blunt object, be careful not to touch the system board with the object. Ensure that the object is

inserted between the battery and the socket before you attempt to pry out the battery. Otherwise, you may damage the system board by prying off

the socket or by breaking circuit traces on the system board.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

13. Connect your computer and devices to electrical outlets, and turn them on.

14. Enter system setup and restore the settings you recorded in step1.

15. Properly dispose of the old battery. See the safety instructions in the Owner's Manual or Product Information Guide.

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

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

Before You Begin

Dell™Dimension™4600CServiceManual



Getting Started



Thissectionprovidesproceduresforremovingandreplacingthecomponents,assemblies,andsubassembliesintheDell™Dimension™4600Ccomputer.

Unless otherwise noted, each procedure assumes that the following conditions exist:

lYou have performed the steps in "Precautionary Measures."

lYou have read the safety information in your Product Information Guide.

lYou have opened the computer cover.



Recommended Tools



Your computer is primarily a tool-less one, but certain procedures (such as removing the heat-sink blower or the control panel) require the use of one or more

of the following tools:

lSmall flat-blade screwdriver

l#1 and #2 Phillips-head screwdrivers

lAn 8-inch, #2 Phillips-head screwdriver



Precautionary Measures



Use the following safety guidelines to help protect your computer from potential damage and to ensure your own personal safety.



Before you start to work on the computer, perform the following steps in the sequence listed:

1. Shut down the computer through the Start menu.

2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut

down your computer, turn them off now.



3. Disconnect any telephone or telecommunication lines from the computer.

4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.



In addition, take note of these safety guidelines when appropriate:

lWhen you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some cables have a connector with locking tabs; if

you are disconnecting this type of cable, press in on the locking tabs before disconnecting the cable. As you pull connectors apart, keep them evenly

aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned.

lHandle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket.

Hold a component such as a microprocessor chip by its edges, not by its pins.



CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Owner's Manual or Product Information

Guide.

CAUTION: Do not attempt to service the computer yourself, except as explained in your online Dell documentation or in instructions otherwise

provided to you by Dell. Always follow installation and service instructions closely.

NOTICE: To help avoid possible damage to the system board, wait 5 seconds (or wait until the standby light is extinguished) after turning off the

computer and unplugging the power cable before removing a component from the system board or disconnecting a device from the computer.

NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.

Protecting Against Electrostatic Discharge



Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch

any of your computer's electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface on the computer chassis.



As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated.



You can also take the following steps to prevent damage from electrostatic discharge (ESD):

lWhen unpacking a static-sensitive component from its shipping carton, do not remove the component from the antistatic packing material until you are

ready to install the component in your computer. Just before unwrapping the antistatic packaging, be sure to discharge static electricity from your body.

lWhen transporting a sensitive component, first place it in an antistatic container or packaging.

lHandle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.



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

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Dell™Dimension™4600CServiceManual

Closing the Computer Cover



Closing the Computer Cover

1. Ensure that all cables are connected, and fold cables out of the way.



Gently pull the power cables toward you so that they do not get caught underneath the drives.

2. Ensure that no tools or extra parts are left inside the computer.

3. Close the cover:

a. Pivot the cover down.

b. Press down on the right side of the cover until it closes.

c. Press down on the left side of the cover until it closes.

d. Ensure that both sides of the cover are locked. If not, repeat all of step 3.

4. Attach the computer stand (optional).



5. Connect your computer and devices to electrical outlets, and turn them on.

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

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

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