Dell inspiron 4000 schematic
SECTION 10
Removing and
Replacing Parts
Preparing to Work Inside the Comput er
Recommended Tools
Screw Identification
System Components
Replacing the Palm Rests
Replacing the Display Cov er
Hard Drive Assembly
Modular Bay Devices
Memory Module
Mini PCI Card Assembly
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Keyboard Assembly
Removing the Display Assembly
Display Assembly Latch
Hinge Covers
Palm Rest Assembly
Microprocessor Thermal Cooling Assembly
Microprocessor Modul e
Reserve Battery
System Speaker
Assembly
System Board
Assembly
Module Latch
Assemblies
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112 Removing and Replacing Parts
Preparing to Work Inside the Computer
NOTICE: Only a certified service technician should per fo rm repairs on your
computer. Damage or inoperability due to servicing not authorized by Dell is
not covered by your warranty.
NOTICE: Unless otherwise noted, each pro cedure in this manual assumes th at
a part can be replaced by performing the removal procedure in reverse order.
NOTICE: To avoid damaging the computer, perform the following steps before
you begin working inside the computer.
Make sure that the work surface is clean to prevent scratching the
1
computer cover.
2 Save and close any open files, and exit any open programs.
Turn off the computer and all attached devices.
3
4 Make sure the computer is undocked.
5 Disconnect the computer from the electrical outlet.
6 To avoid possible damag e to the system board, wait 10 to 20 seconds
and then disconnect any attached device s.
7 Disconnect all other external cables from the computer.
8 Remove any install e d PC Cards or plastic blanks from the PC Card
slot.
9 Close the display and turn the computer upside down on a flat work
surface.
10 Remove the primary battery from the battery ba y and the secondary
battery from the modular bay, if a secondary battery is in use.
NOTICE: To avoid damaging the system board, you must remove the main
battery and secondary battery (if present) before you se rvice the comp uter.
Remove any installed device in the modular bay.
11
12 To dis sipate any sta tic electr icity while you work, periodi cally touch an
unpainted metal surface on the computer , such as the I/O panel on the
back of the computer chassis.
HINT: Make sure the
computer is turned off and
not in standby or
hibernate mode. If you
cannot shut down the
computer using the
computer’s operating
system, press and hold the
power button for 4
seconds.
Removing and Replacing Parts 113
13 Handle components and cards with care. Do not touch the
components or contacts on a card. Hold a card by it edges or by its
metal mounting bracket. Hold a component such as a microprocessor
by its edges, not by its pins.
Recommended Tools
The procedures in this manual require the following tools:
• #1 magne t ized Phillips screwdriver
• Small flat-blade screwdriver
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• Small plastic scribe
• Microprocessor extractor
• Flash BIOS update program floppy disk or CD (required only when
upgrading the microprocessor, replacing the reserve battery, or
replacing the system board)
Screw Identification
When you are removing and replacing components, photocopy the screw
placemat as a tool to lay out and keep track of the component screws. The
placemat provides the number of screws and the sizes.
NOTICE: When reinstalling a screw, you must use a screw of the correct
diameter and length. Make sure that the screw is properly aligned with its
corresponding hole, and avoid over tightening.
114 Removing and Replacing Parts
Screw Placement
Hard Drive Door Security:
M3 x 5 (1 each)
LCD Hinge Bracket to
Bottom Case Assembly:
M2.5 x 5 (5 each)
Keyboard to Bottom Case
Assembly:
M2.5 x 12 (5 each)
14.1-Inch LCD Display
Assembly and Flex-Cable
Retention Bracket to Top
Cover:
M2 x 4 (5 each)
LCD Display Bezel:
M2.5 x 5 (4 each)
Rubber Screw
Covers (4 each)
Display Assembly EMI
Shield Bracket:
M2 x 3 (5 each)
Palm Rest to
Bottom Case Assembly:
M2 x 3 (5 each)
M2.5 x 12 (3 each
)
Hybrid Cooling Fan:
M2.5 x 5 (2 each)
System Board
to Bottom Case Assembly:
M2.5 x 5 (10 each)
Removing and Replacing Parts 115
System Components
k
keyboard
top cover display
assembly
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palm rest assembly
left speaker/antenna
assembly
hard drive
right speaker/antenna
assembly
main battery
bottom case assembly
modular bay dev i c e
memory module cover
center control
cover
thermal cool i ng
assembly
hybrid cooling fan
system board
modem and networ
connector covers
fan guard
116 Removing and Replacing Parts
Replacing the Palm Rests
1 Save and close any open files, exit any open programs, and shut down
the computer.
2 If the computer is connected (docked) to an advanced port replicator
(APR), undock it.
3 Keep the display open and tilt the computer back so that you can
access the bottom of the computer.
4 Slide and hold the latch release on the left side, and remove any device
installed in the modular bay.
5 Slide and hold the latch release on the right side, and remove any
battery installed in the battery bay.
6 Locate the orange palm rest removal buttons. Firmly press the buttons
with the eraser end of a pencil (or a dull utensil smaller than your
finger) to release the palm rests.
7 Remove the pa lm rests.
8 To replace the palm rests, insert the tabs on the inside edge of the
palm rest into the slots on the computer. Then press along the outside
edges of the palm rest until it snaps into place.
Repeat the process on each side.
Removing and Replacing Parts 117
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Replacing the Display Cover
1 Slide your index fingers under the straight edge of the display cover
until the cover pops out.
2 Slide the display cover towards the back of the compu ter.
118 Removing and Replacing Parts
3 User your fingers to release the cover completely, and remove it.
4 To replace the display cover, bend it slightly to insert the four tabs on
the rounded edge of the cover into the slots on the top of the
computer.
5 Press the cover along the straight edge at the back of the computer
until it snaps into place.
6 Firmly press the Dell logo until it snaps into place. Press above both
hinge covers to engage the final snaps.
Hard Drive Assembly
NOTICE: The hard drive is very sensitive to shock. Handle the assembly by its
edges (do not squeeze the top of the hard drive case), and avoid dropping it.
bottom of computer
M3 x 5-mm screw
hard drive door
Removing the Hard Drive Assembly
NOTICE: Disconnect the computer and any a ttached 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 unpa inted metal surface on the comput er.
NOTICE: Read “Preparing to Wo rk Inside the Computer ” be fo re pe rforming
the following procedure.
1
Remove the screw from the hard drive door.
Removing and Replacing Parts 119
2 Slide the drive door up until the drive assembly tabs disenga ge from
the door slots in the bott om case assembly.
3 Pull the drive assembly straight out of the bottom case assembly.
Replacing the Hard Drive Assembly
1 Push the drive assembly into the hard drive opening of the computer.
2 Align the drive assembly tabs with the bottom case assembly slots and
push down until it clicks into place.
3 Replace the screw in the drive door.
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Modular Bay Devices
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: Read “Preparing t o Wor k I n side the Computer” befo re pe rforming
the follo wing proced ure.
1
Close the display, and turn the computer upsi de down on a flat work
surface.
2 Slide the modular bay latch toward the right.
3 Keep holding the latch open while you pull the device out of the
modular bay with the other hand.
Memory Module
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.
120 Removing and Replacing Parts
Removing the Memory Module Cover
NOTICE: Disconnect the computer and any a ttached 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 unpa inted metal surface on the comput er.
NOTICE: Read “Preparing to Wo rk Inside the Computer ” be fo re pe rforming
the following procedure.
1
Remove the memory module cover:
a Use a coin or flat-blade screwdriver to release the two captive
screws that secure the memory module cover.
b Place your finger under the cover at the indentation and lift and
slide the cover open.
Removing and Replacing Parts 121
HINT: T he 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.
JDIM 1
JDIM 2
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inner tabs
(2 per socket)
memory
module connectors (2)
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: Read “Preparing t o Wor k I n side the Computer” befo re pe rforming
the follo wing proced ure.
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.
To release a memory module from its connector, spread apart the inner
2
tabs of the memory module connector just far enough for the memory
module to disengage from the connector. The module sho uld pop up
slightly.
3 Lift the memory module out of its connector.
Replacing the Memory Modules
1 If 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.”
122 Removing and Replacing Parts
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