Dell Vostro A840 Manuale utente

Dell™Vostro™A840/A860ServiceManual

Before You Begin

Module Cover

Memory Module

Mini-Cards

Center Control Cover

Keyboard

Display

Palm Rest

System Fan

Processor Heat Sink

Processor

Hard Drive

Coin-Cell Battery

Optical Drive

Speaker

System Board

Battery Latch Assembly

Flashing the BIOS

Model PP38L, PP37L

Notes, Notices, and Cautions

Information in this document is subject to change without notice.

©2008DellInc.Allrightsreserved.

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

Trademarks used in this text: Dell, the DELL logo, and Vostro are trademarks of Dell Inc.; Bluetooth is a registered trademark owned by Bluetooth SIG, Inc. and is used by Dell

under license. Microsoft, Windows, Windows Vista, and Windows Vista start button are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or

other countries.

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.

September 2009 Rev. A01

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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Module Cover

Dell™Vostro™A840/A860ServiceManual

Removing the Module Cover

Replacing the Module Cover



Removing the Module Cover



1. Follow the procedures in Before You Begin.



2. Turn the computer over.



3. Remove the two screws from the module cover.



4. Lift the module cover away from the computer.

Replacing the Module Cover



1. Replace the module cover.



2. Replace the two screws on the module cover.



3. Slide the battery into the battery bay, until it clicks into place.

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

CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface

(such as a connector on the back of the computer).

module cover screw (2)

module cover

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Battery Latch Assembly

Dell™Vostro™A840/A860ServiceManual

Removing the Battery Latch Assembly

Replacing the Battery Latch Assembly



Removing the Battery Latch Assembly



1. Follow the instructions in Before You Begin.



1. Remove the system board (see System Board).



2. Remove the screw from the battery-lock latch and remove it.



3. Remove the screw from the battery-bay release latch.



4. Slide the battery latch assembly to the right to remove it.



5. Unhook the latch spring from the latch.

Replacing the Battery Latch Assembly



1. Replace the spring and slide the battery latch assembly into place.



2. Replace and tighten the screws.



3. Replace the system board (see Replacing the System Board).



4. Slide the battery into the battery bay, until it clicks in place.

CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching a connector on the back

panel of the computer.

NOTICE: Before you remove the battery release button, observe the orientation of the button to ensure proper installation when the button is

replaced.

battery-lock latch

battery-bay release latch

latch spring



NOTICE: Ensure the battery latch assembly is properly oriented. The indent for the button should face up when installing the assembly.

Back to Contents Page



Back to Contents Page

Before You Begin

Dell™Vostro™A840/A860ServiceManual

Recommended Tools

Turning Off Your Computer

Before Working Inside Your Computer

This section provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that the

following conditions exist:

lYou have performed the steps in Turning Off Your Computer and Before Working Inside Your Computer.

lYou have read the safety information shipped with your computer.

lA component can be replaced or—if purchased separately—installed by performing the removal procedure in reverse order.

Recommended Tools

The procedures in this document may require the following tools:

lSmall flat-blade screwdriver

lPhillips screwdriver

lFlash BIOS update program CD

Turning Off Your Computer



1. Save and close all open files and exit all open programs.



2. Click Start , click the arrow , and then click Shut Down.

The computer turns off after the operating system shutdown process finishes.



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

down your operating system, press and hold the power button until the computer turns off.

Before Working Inside Your Computer

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



1. Ensure that the work surface is flat and clean to prevent the computer cover from being scratched.



2. Turn off your computer (see Turning Off Your Computer).



NOTICE: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.

CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: 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 processor by its edges, not by its pins.

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as

authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not

authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

NOTICE: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking

tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect 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.

NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer.



3. Disconnect all telephone or network cables from the computer.



4. Close the display and turn the computer upside down on a flat work surface.



5. Disconnect your computer and all attached devices from their electrical outlets.



6. Remove the main battery:

a. Unlock the battery by sliding the battery-lock latch towards the outer edge.

b. Slide the battery-bay release latch and hold it.

c. Remove the battery from the battery bay.



7. Press the power button to ground the system board.

Back to Contents Page



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

NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer.

NOTICE: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for

other Dell computers.

battery-lock latch

battery-bay release latch

battery



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Flashing the BIOS

Dell™Vostro™A840/A860ServiceManual

Flashing the BIOS From a CD

Flashing the BIOS From the Hard Drive

If a BIOS-update program CD is provided with the new system board, flash the BIOS from the CD. If you do not have a BIOS-update program CD, flash the

BIOS from the hard drive.

Flashing the BIOS From a CD



1. Ensure that the AC adapter is plugged in and that the main battery is installed properly.



2. Insert the BIOS-update program CD, and restart the computer.

Follow the instructions that appear on the screen. The computer continues to boot and updates the new BIOS. When the flash update is complete, the

computer will automatically reboot.



3. Press <F2> during POST to enter the system setup program.



4. Press <Alt><f> to reset the computer defaults.



5. Press <Esc>, select Save changes and reboot, and press <Enter> to save configuration changes.



6. Remove the BIOS-update program CD from the drive and restart the computer.

Flashing the BIOS From the Hard Drive



1. Ensure that the AC adapter is plugged in, the main battery is properly installed, and a network cable is attached.



2. Turn on the computer.



3. Locate the latest BIOS update file for your computer at support.dell.com.



4. Click Download Now to download the file.



5. If the Export Compliance Disclaimer window appears, click Yes, I Accept this Agreement.

The File Download window appears.



6. Click Save this program to disk and then click OK.

The Save In window appears.



7. Click the down arrow to view the Save In menu, select Desktop, and then click Save.

The file downloads to your desktop.



8. Click Close if the Download Complete window appears.

The file icon appears on your desktop and is titled the same as the downloaded BIOS update file.



9. Double-click the file icon on the desktop and follow the instructions on the screen.

Back to Contents Page



NOTE: If you use a BIOS-update program CD to flash the BIOS, set up the computer to boot from a CD before inserting the CD.

Back to Contents Page

Internal Card With Bluetooth®Wireless Technology

Dell™Vostro™A840/A860ServiceManual

Removing the Bluetooth®Card

Replacing the Bluetooth®Card



Removing the Bluetooth®Card



1. Follow the instructions in "BeforeYouBegin"onpage9.



2. Remove the palm rest (see Palm Rest).



3. Remove the bluetooth card cable connector from the system board.



4. Gently lift the bluetooth card from the bluetooth card compartment on the computer base.

Replacing the Bluetooth®Card



1. Replace the bluetooth card in the compartment in the computer base.



2. Replace the bluetooth cable connector to the system board.



3. Follow the instructions in Replacing the Palm Rest.



4. Slide the battery into the battery bay, until it clicks in place.

Back to Contents Page



CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such

as the back panel) on the computer.

bluetooth card cable

bluetooth card

bluetooth card compartment

bluetooth card cable connector

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Coin-Cell Battery

Dell™Vostro™A840/A860ServiceManual

Removing the Coin-Cell Battery

Replacing the Coin-Cell Battery



Removing the Coin-Cell Battery



1. Follow the instructions in Before You Begin.



2. Remove the system board (see Removing the System Board).



3. Turn the system board over.



4. Disconnect the coin-cell battery cable from the system board connector.



5. Remove the coin-cell battery out of the mylar sleeve.

Replacing the Coin-Cell Battery



1. Replace the coin cell battery in the mylar sleeve.



2. Connect the coin-cell battery cable to the system board connector.



3. Follow the instructions in Replacing the System Board.



4. Slide the main battery into the battery bay, until it clicks into place.

Back to Contents Page



CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface

(such as a connector on the back of the computer).

NOTICE: To help prevent damage to the system board, you must remove the battery from the battery bay before you begin working inside the

computer.

coin-cell battery

coin-cell battery cable connector

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Processor

Dell™Vostro™A840/A860ServiceManual

Removing the Processor

Replacing the Processor



Removing the Processor



1. Follow the instructions in Before You Begin.



2. Remove the heat sink (see Processor Heat Sink).



3. To loosen the ZIF socket, use a small, flat-blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until it comes to the cam stop.

The ZIF-socket cam screw secures the processor to the system board. Make a note of the arrow on the ZIF-socket cam screw.



4. Lift the processor from the ZIF socket.

Replacing the Processor



CAUTION: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best

practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface

(such as a connector on the back of the computer).

NOTICE: To prevent intermittent contact between the ZIF-socket cam screw and the processor when removing or replacing the processor, press

to apply slight pressure to the center of the processor while turning the cam screw.

NOTICE: To avoid damage to the processor, hold the screwdriver so that it is perpendicular to the processor when turning the cam screw.

processor

pin-1 corner of processor

ZIF socket

ZIF-socket cam screw



NOTICE: To ensure maximum cooling for the processor, do not touch the heat transfer areas on the processor heat sink. The oils in your skin can

reduce the heat transfer capability of the thermal pads.

NOTICE: When removing the processor, pull it straight up. Be careful not to bend the pins on the processor.

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