Dell Inspiron 4000 Parts Manual

							Removing and Replacing Parts121
Removing the Memory Module Cover
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the memory module cover:
 HINT: The screw labeled 
with the “circle K” in the 
middle of the memory 
module cover secures the 
keyboard assembly and 
does not secure the 
memory module cover.aUse a coin or flat-blade screwdriver to release the two captive 
screws that secure the memory module cover. 
bPlace your finger under the cover at the indentation and lift and 
slide the cover open.  
						

							122Removing and Replacing Parts
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Removing the Memory Modules
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the memory module cover.
 NOTICE: Handle memory modules with care. Do not touch the components on 
a module. Hold the module by its edges.
2
To release a memory module from its connector, spread apart the inner 
tabs of the memory module connector just far enough for the memory 
module to disengage from the connector. The module should pop up 
slightly.
3Lift the memory module out of its connector.
Replacing the Memory Modules
1If you only have one memory module, install it in the connector 
labeled “JDIM1.” If you have two memory modules, install the second 
module in the connector labeled “JDIM2.”
memory 
module connectors (2) inner tabs
(2 per socket)
JDIM 1
JDIM 2 
						

							Removing and Replacing Parts123
 HINT: Memory modules 
are keyed, or designed to 
fit into their connectors, 
in only one direction. 2Align the memory module’s edge connector with the slot in the center 
of the memory module connector. With the module at a 45-degree 
angle, press the memory module’s edge connector firmly into the 
memory module connector.
3Pivot the memory module down until it clicks into place. If you do not 
hear a click, remove the memory module and reinstall it.
4Insert the tabs on the memory module cover into the bottom case 
assembly. Rotate the memory module cover down and tighten the two 
captive screws.
Mini PCI Card Assembly
 NOTICE: The only time you should ever access the inside of your computer is 
when you are installing memory modules or a Mini PCI card.
The optional Mini PCI card assembly may contain either a modem, network 
adapter, or combination of both. You must remove the Mini PCI card 
subassembly before the system board assembly can be removed. The Mini 
PCI card subassembly must be connected to the internal antenna for proper 
operation.
Removing the Mini PCI Card Assembly
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
modem connector
network card 
connector 
						

							124Removing and Replacing Parts
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 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the memory module cover.
2To release a Mini PCI card subassembly from its connector, spread 
apart the inner tabs of the connector just far enough for the Mini PCI 
card assembly to disengage from the connector. The module should 
pop up slightly from the interface connector.
3Lift the Mini PCI card subassembly out of its connector and 
disconnect any attached cables.
Replacing the Mini PCI Card Assembly
1Align and press the Mini PCI card subassembly into the system board 
interface connector.
 HINT: A modem-only 
Mini PCI card has only 
one cable and connector.2Connect the interface cables.
3Replace the memory module cover.
Keyboard Assembly
M2.5 x 12-mm 
screws (5) 
						

							Removing and Replacing Parts125
Removing the Keyboard Assembly
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the hard drive assembly.
2Turn the computer bottom-side up, and remove the five screws labeled 
with a “circle K.”
3Turn the computer right-side up and open the display.
 NOTICE: The key caps on the keyboard are fragile, easily dislodged, and 
time-consuming to replace. Be careful when removing and handling the 
keyboard.
4
Insert a small, flat-blade screwdriver or plastic scribe into the scalloped 
edge next to the right  key, and release the keyboard from the 
palm rest assembly.
5Lift the keyboard straight up until it clears the keyboard boss support 
in the bottom case assembly. 
6Rotate the keyboard forward toward the front of the computer.
7Rest the key face of the keyboard on the palm rest.
keyboardscalloped edge 
of blank key
palm rest 
track stick 
						

							126Removing and Replacing Parts
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8Disconnect the keyboard flex cable from the interface connector on the 
system board assembly by pulling up on the connector.
9Remove the keyboard assembly from the bottom case assembly.
Replacing the Keyboard Assembly
1Place the keyboard on the palm rest at the front of the computer with 
the keys facing down and the connector toward the back of the 
computer.
2Connect the keyboard flex cable to the interface connector on the 
system board assembly.
 NOTICE: Position the keyboard cable so that it does not pinch when you 
replace the keyboard in the bottom case assembly.
3
Carefully turn the keyboard over and fit the keyboard into place.
4Check that the keyboard is correctly installed. The keys should be flush 
with the left and right surfaces of the palm rest.
 NOTICE: Make sure that the keyboard is aligned correctly to avoid stripping 
the screws the next time they are removed.
5
Reinstall the five M2.5 x 12-mm screws in the holes labeled “circle K.”
 NOTICE: You must remove the display assembly before you remove the palm 
rest assembly; the display assembly hinges pass through the back of the palm 
rest assembly.
track stick cable
keyboard cable 
						

							Removing and Replacing Parts127
Removing the Display Assembly
 HINT: Always remove 
and replace the LCD panel 
as a complete assembly.  NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the hard drive assembly.
2Remove the center control cover:
aUse a scribe to lift the right edge of the center control cover and 
pry it loose from the bottom case assembly.
LCD flex cable connector
bottom case assembly
center control cover
EMI shield brackettop cover display assembly M2 x 3-mm screws (2)
M2.5 x 5-mm screws  
						

							128Removing and Replacing Parts
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bLift the center control cover up and away from the bottom case 
assembly.
3Close the display. From the back of the computer, remove the five 
screws labeled with the “circle D.” There are two screws on the right 
hinge and three screws on the left hinge.
4Open the display assembly approximately 90 degrees, and support the 
display assembly so that it does not open past this position.
5Remove the two M2 x 3-mm screws that secure the EMI shield bracket 
(metal) to the system board assembly.
6Remove the flex cable EMI shield retention bracket that covers the 
display flex cable connector on the system board.
7Pull straight up on the loop attached to the interface cable connector 
to disconnect the display flex cable from the system board.
8Lift the display assembly from the bottom case assembly.
 HINT: The right plastic 
hinge cover is labeled “R” 
and the left plastic hinge 
cover is labeled “L.”9Remove the right and left plastic hinge covers from the hinges.
 NOTICE: When reconnecting the display-feed cable connector to the system 
board, push down on the top left and right ends of the connector. Pressing on 
the center of the connector might damage resistors and compromise EMI 
protection in the computer. 
						

							Removing and Replacing Parts129
Removing the 14.1-Inch Display Assembly Bezel
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
LCD panel
display assembly top cover display-feed flex cable M2.5 x 5-mm screws (4)rubber screw covers (4)display assembly bezel
M2 x 4-mm 
screws (4) 
						

							130Removing and Replacing Parts
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 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the hard drive assembly.
2Remove the display assembly.
3Use the scribe to pry the four rubber screw covers out of the screw 
holes located at the four corners of the bezel on the front of the display 
assembly.
4Remove the four M2.5 x 5-mm screws located at the corners of the 
bezel on the front of the display assembly.
 NOTICE: Some of the bezel snaps may be difficult to remove, so be careful 
when separating the bezel from the display assembly.
5
Use a plastic scribe and separate the bezel from the display-assembly 
top cover.
6Be careful not to lose the display magnet on the right side of the back 
cover. The polarity of the magnet is marked with a minus “–” sign and 
oriented toward the bottom of the display. Make sure to replace the 
magnet in the same orientation when you reassemble the display.
Removing the 14.1-Inch LCD Panel
 NOTICE: Disconnect the computer and any attached devices from electrical 
outlets, and remove any installed batteries.
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by touching an unpainted metal surface on the computer.
 NOTICE: Rea d “Preparing to Work Inside the Computer” before performing 
the following procedure.
1
Remove the hard drive assembly.
2Remove the display assembly.
3Remove the display assembly bezel.
4Remove the two M2 x 4-mm screws on the left side of the LCD panel 
and the two M2 x 4-mm screws on the right side of the LCD panel.