Dell Inspiron 1420 User manual

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Dell™Inspiron™1420/DellVostro™1400
Service Manual
Notes, Notices, and Cautions
Information in this document is subject to change without notice.
©2007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, Inspiron, and Vostro are trademarks of Dell Inc.; Intel is a registered trademark of Intel Corporation; Microsoft, Windows, and
Windows Vista are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries; Bluetooth is a registered trademark owned by
Bluetooth SIG, Inc. and is used by Dell under license.
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
Before You Begin
Internal Card With Bluetooth®Wireless Technology
Optical Drive
Hard Drive
Memory
Modem
Coin-Cell Battery
Keyboard Cover
Keyboard
Communication Cards
Intel®Turbo Memory
Display
Camera Module
Palm Rest
Fan
Microprocessor Thermal-Cooling Assembly
Microprocessor Module
System Board
Speakers
Flashing the BIOS
Pin Assignments for I/O Connectors
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.
NOTE: The appearance of your computer may vary from what is shown in this document.

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Before You Begin
Dell™Inspiron™1420/DellVostro™1400
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intheDell™Product Information Guide.
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Small Phillips screwdriver
lSmall plastic scribe
lFlash BIOS update program CD
Turning Off Your Computer


1. Shut down the operating system:
a. Save and close all open files and exit all open programs.
b. Click the Windows Vista Start button , click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down.
The computer turns off after the operating system shutdown process is complete.

2. 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 for about 4 seconds to turn them 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.





NOTICE: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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: 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.
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.

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
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).


3. Disconnect all telephone or network cables from the computer.


4. Disconnect your computer and all attached devices from their electrical outlets.

5. Close the display and turn the computer upside-down on a flat work surface.

6. Slide the battery release latches toward the sides of the computer until they are engaged.

7. Slide the battery out of the bay.

8. Open the display.

9. Press the power button to ground the system board.



10. Remove any installed cards from the ExpressCard slot and the 8-in-1 memory card reader.
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
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.
1
battery
2
battery release latches (2)
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the display.
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 static electricity, which could harm internal
components.

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Flashing the BIOS
Dell™Inspiron™1420/DellVostro™1400
Service Manual

1. Download the BIOS utility from the Dell Support website at support.dell.com and save it to your desktop.

2. After the download completes, double-click the BIOS utility file.

3. In the Dell BIOS Flash window, click Continue.

4. When the reboot message appears, click OK and wait for the computer to restart.
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

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Internal Card With Bluetooth®Wireless Technology
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing and Replacing Internal Card With Bluetooth®Wireless Technology


Removing and Replacing Internal Card With Bluetooth®Wireless Technology


If you ordered an internal card with Bluetooth wireless technology with your computer, it is already installed.

1. Follow the procedures in Before You Begin.

2. Remove the memory module cover (see Memory).


3. Using a Phillips screwdriver, remove the screw securing the Bluetooth card to the chassis.

4. While grasping the card cable with one hand, use a plastic scribe to gently pry and lift the Bluetooth card up and out of the communications card bay.

5. Disconnect the card from the card cable.

6. Connect the replacement card to the card cable.

7. Slide the card underneath the metal clips.

8. Tighten the captive screw to secure the card carrier.
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
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformationGuide.
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.
CAUTION: Before performing the following procedures, follow the safety instructions in your Product Information Guide.
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.
1
metal clip
2
internal card with Bluetooth wireless technology
3
captive screw
NOTICE: Be careful when removing the card to avoid damaging the card, card cable, or surrounding components.

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Camera Module
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing and Replacing the Camera Module
Removing and Replacing the Camera Module



1. Follow the instructions in Before You Begin.

2. Remove the display bezel (see Removing the Display Bezel).

3. Lift the cable securing tab, and then gently pull the camera module cable from the connector.

4. Remove the two M2 x 3-mm screws securing camera module to the display assembly.

5. Gently lift the camera module.

6. Install the replacement camera and tighten the two M2 x 3-mm screws.

7. Insert the camera module cable in the connector and press down the securing tab.

8. Replace the display bezel (see Replacing the Display Bezel).
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
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
display
2
screws (2)
3
camera
4
camera module

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Coin-Cell Battery
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing the Coin-Cell Battery
Replacing the Coin-Cell Battery



Removing the Coin-Cell Battery

1. Follow the procedures in Before You Begin.

2. Turn the computer over.

3. Loosen the captive screws on the coin-cell battery cover and remove the cover.

4. Remove the modem (see Modem).

5. Lift the coin-cell battery up and off the system board.

6. Remove the tape securing the coin-cell battery to the system board.

7. Disconnect and remove the coin-cell battery cable from the power connector on the system board.
Replacing the Coin-Cell Battery

1. Connect the coin-cell battery cable to the system board.

2. Place the coin-cell battery on the system board in the location marked .

3. Replace the modem (see Modem).

4. Replace the cover and tighten the captive screws.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
coin-cell battery
2
battery cable connector
NOTE: The coin-cell battery is secured to the system board with double-sided tape.

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

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Microprocessor Module
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing the Microprocessor Module
Replacing the Microprocessor Module
Removing the Microprocessor Module




1. Follow the instructions in Before You Begin.

2. Loosen the three captive screws securing the microprocessor module cover, then remove the cover and set it aside.


3. Remove the microprocessor thermal-cooling assembly (see Removing the Microprocessor Thermal-Cooling Assembly).


4. To loosen the ZIF-socket cam lock, use a small, flat-blade screwdriver and rotate the ZIF-socket cam screw counterclockwise until it comes to the cam
stop.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
NOTICE: Handle the microprocessor module with care. Hold the microprocessor module by its edges and do not touch the processor die (the small
chip in the center of the module).
1
microprocessor module cover
2
captive screw (3)
NOTICE: To ensure maximum cooling for the microprocessor, do not touch the heat transfer areas on the microprocessor thermal-cooling
assembly. Oils in your skin can reduce the heat transfer capability of the thermal pads.
NOTICE: To avoid damaging the microprocessor, hold the screwdriver so that it is perpendicular to the microprocessor module when turning the
cam screw.
NOTE: The ZIF-socket cam screw secures the microprocessor module to the system board.

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

5. Lift the microprocessor module straight up and out of the ZIF-socket.
Replacing the Microprocessor Module



1. Follow the instructions in Before You Begin.


2. Follow the instructions in Removing the Microprocessor Module.


3. Align the pin-1 corner of the new microprocessor module with the pin-1 corner of the ZIF socket, and insert the microprocessor module.
When the microprocessor module is properly seated, all four corners of the module are aligned at the same height. If one or more corners of the module
is higher than the others, the module is not properly seated.


4. To tighten the ZIF-socket cam lock and secure the microprocessor module to the system board, use a small, flat-blade screwdriver and rotate the ZIF-
socket cam screw clockwise until it comes to the cam stop.

5. Replace the microprocessor thermal-cooling assembly (see Replacing the Microprocessor Thermal-Cooling Assembly).

1
microprocessor module
2
ZIF-socket
3
ZIF-socket cam screw
NOTICE: When removing the microprocessor module, pull the module straight up and out of the ZIF-socket. Exercise care not to bend the pins on
the microprocessor module.
NOTE: The microprocessor module and the ZIF-socket illustration shown may not exactly resemble the ones in your system.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
NOTE: When installing a new microprocessor module, use the thermal cooling assembly or thermal pad that came with the module, if applicable.
NOTICE: Handle the microprocessor module with care. Hold the microprocessor module by its edges and do not touch the processor die (the small
chip in the center of the module).
NOTICE: Ensure that the cam lock is in the fully open position before seating the microprocessor module. Seating the microprocessor module
properly in the ZIF socket does not require force. A microprocessor module that is not properly seated can result in an intermittent connection or
permanent damage to the microprocessor and ZIF socket.
NOTE: The pin-1 corner of the microprocessor module has a triangle that aligns with the triangle on the pin-1 corner of the ZIF socket.
NOTE: Gently press down on the substrate on which the processor die is mounted to ensure the microprocessor module is properly seated.
NOTICE: To avoid damaging the microprocessor, hold the screwdriver so that it is perpendicular to the microprocessor module when turning the
cam screw.

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6. Replace the microprocessor module cover.

7. Update the BIOS using a flash BIOS update program floppy disk or CD. For instructions on how to flash the BIOS, see Flashing the BIOS.
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

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Microprocessor Thermal-Cooling Assembly
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing the Microprocessor Thermal-Cooling Assembly
Replacing the Microprocessor Thermal-Cooling Assembly
Removing the Microprocessor Thermal-Cooling Assembly



1. Follow the instructions in Before You Begin.

2. Loosen the three captive screws securing the microprocessor module cover, then remove the cover and set it aside.

3. Loosen the four captive screws securing the microprocessor thermal-cooling assembly to the system board, then carefully lift the assembly straight out
of the computer.
Replacing the Microprocessor Thermal-Cooling Assembly


CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
microprocessor module cover
2
captive screws (3)
1
microprocessor thermal-cooling assembly
2
screws (4)
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.

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
1. Follow the instructions in Before You Begin.

2. Follow the instructions in Replacing the Microprocessor Module.

3. Align the four captive screws on the new microprocessor thermal-cooling assembly with the screw holes on the system board.

4. Tighten the four captive screws in the order that they are numbered to secure the microprocessor thermal-cooling assembly to the system board.

5. Replace the microprocessor module cover.
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
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.

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Display
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing the Display Assembly
Replacing the Display Assembly
Removing the Display Bezel
Replacing the Display Bezel
Removing the Display Panel
Replacing the Display Panel
Removing the Display Assembly



1. Follow the instructions in Before You Begin.

2. Remove the four M2.5 x 5-mm screws (one on each side of the main battery bay and one below each hinge cover) that connect the display assembly to
the computer.

3. Remove the keyboard cover (see Removing the Keyboard Cover).

4. Remove the keyboard (see Removing the Keyboard).

5. Lift the cable securing tab for the camera module cable, and then gently pull the camera module cable from the connector.

6. Using a plastic scribe, pry out the left and right hinge covers.

7. Ensure that the display is opened all the way (150 degrees).

8. Use the pull-tab to disconnect the display cable from the system board.

9. Remove the Mini-Card antenna cables from the cards.

10. Remove the Mini-Card antenna cables from the cable guide.

11. Remove the screw from the media buttons board.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
display cable pull-tab
2
Mini-Card antenna cables

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
12. Slide the media buttons board left to release it from the grips and lift the media buttons board.

13. Rotate the LCD assembly upward for easy removal.

14. Lift the display assembly straight up and out of the computer.
Replacing the Display Assembly



1. Follow the instructions in Before You Begin

2. Follow the instructions in Removing the Display Assembly.

3. Align the new display assembly over the screw holes in the base of the computer.

4. Replace the two M2.5 x 5-mm screws marked D (one on each side of the main battery bay) to secure the display assembly to the base of the computer.

1
media buttons board
2
screw
3
grips (5)
1
screws (2)
2
main battery bay
3
bottom of the system
1
screws (2)
2
back of the system
3
hinge covers (2)
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.

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5. Carefully route the Mini-Card antenna cables through the cable guide on the base of the computer.

6. Connect the Mini-Card antenna cable connectors.

7. Replace the media buttons board by sliding it in place.

8. Tighten the screw to secure the media buttons board.

9. Connect the display cable to the system board.

10. Replace the left and right hinge covers by pressing them in place.

11. Replace the keyboard (see Replacing the Keyboard).

12. Replace the keyboard cover (see Replacing the Keyboard Cover).
Removing the Display Bezel



1. Follow the instructions in Before You Begin.

2. Remove the display assembly (see Removing the Display Assembly).

3. Use a plastic scribe to remove the six rubber bumpers from around the display assembly.

4. Remove the six M2.5 x 5-mm screws from around the display assembly.


5. Use your fingers to separate the bezel from the display assembly by lifting the inside edge of the bezel up and away from the center of the display
assembly.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
NOTICE: To avoid damaging the bezel, carefully separate the bezel from the display assembly by starting along the bottom of the display (near
the Dell logo) and working around the edge of the display towards the release latch.
1
bezel
2
rubber bumpers (6)
3
M2.5 x 5-mm screws (6)
4
display

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Replacing the Display Bezel



1. Follow the instructions in Before You Begin.

2. Follow the instructions in Removing the Display Assembly.

3. Starting near the hinges (near the Dell logo), use your fingers to snap the new bezel into place.

4. Replace the six M2.5 x 5-mm screws to secure the bezel.

5. Replace the six rubber bumpers to cover the screws.

6. Replace the display assembly (see Replacing the Display Assembly).
Removing the Display Panel



1. Follow the instructions in Before You Begin.

2. Remove display assembly (see Removing the Display Assembly).

3. Remove the display bezel (see Removing the Display Bezel).

4. Remove the two screws securing the display panel to the display cover.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
screws (2)
2
display panel
3
display cover

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
5. Lift the cable securing tab and gently pull to disconnect the camera module cable from the connector.

6. Gently lift the bottom of the display panel up, then slide the display panel forward to remove it from the display cover.

7. Remove the six M2 x 3-mm screws (three on each side) securing the display bracket to the display panel.

8. Press inward on the metal clamps on both sides of the top flex-cable connector and gently pull to disconnect the top flex-cable connector from the
display locking connector.

9. Use the pull-tab to disconnect the bottom flex-cable connector from the inverter connector.
Replacing the Display Panel



1. Follow the instructions in Before Working Inside Your Computer.

1
display panel
2
display cover
3
camera module connector
4
camera
5
camera module


1
back of display panel
2
top flex-cable connector
3
camera module cable
4
metal clamp
5
bottom flex-cable connector
6
inverter connector
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.

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2. Follow the instructions in Removing the Display Panel.

3. Replace the six M2 x 3-mm screws (three on each side) to secure the display bracket to the display panel.

4. Connect the camera module cable from the connector.

5. Connect the top flex-cable connector to the display locking connector on the new display panel.

6. Connect the bottom flex-cable connector to the inverter connector.


7. Gently place the display panel inside the display cover.

8. Replace the two screws securing the display panel to the display (top) cover.

9. Replace the display bezel (see Replacing the Display Bezel).

10. Replace display assembly (see Replacing the Display Assembly).

11. Replace the left and right hinge covers by pressing them in place.

12. Replace the keyboard (see Replacing the Keyboard).

13. Replace the keyboard cover (see Replacing the Keyboard Cover).
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
NOTICE: To avoid damaging the display cover and/or the display panel, ensure that the guide posts at the top of the display panel are properly
aligned with the corresponding notches on the display cover.

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Fan
Dell™Inspiron™1420/DellVostro™1400
Service Manual
Removing the Fan
Replacing the Fan
Removing the Fan



1. Follow the instructions in Before You Begin.

2. Remove the system board (see Removing the System Board).

3. Remove the three M2.5 x 5-mm screws securing the fan to the system board.

4. Loosen the shoulder screw securing the fan to the system board.

5. Disconnect the fan connector from the system board connector.

6. Lift the fan out of the computer.
Replacing the Fan



1. Follow the instructions in Before You Begin.

2. Follow the instructions in Removing the Fan.

3. For replacement of the fan, perform the steps in Removing the Fan in reverse order.
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.
1
screw (3)
2
fan
3
shoulder screw
4
system board
CAUTION: Before you perform any of the procedures in this section, follow the safety instructions in the Product Information Guide.
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.