Dell Inspiron 4000 Parts Manual

Removing and Replacing Parts141
Reserve Battery
 NOTICE: The reserve battery provides power to the computer’s RTC and 
NVRAM when the computer is turned off. Removing the battery causes the 
computer to lose the date and time information as well as all user-specified 
parameters in the BIOS. If possible, make a copy of this information before 
you remove the reserve battery.
 HINT: To update or 
reflash the BIOS, see the 
Dell Portable Computer 
BIOS Update Guide 
for 
instructions.
Removing the Reserve...

142Removing and Replacing Parts
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Replacing the Reserve Battery
1Connect the reserve battery cable to the connector on the system 
board. 
2Position the reserve battery on the EMI shield next to the connector to 
minimize slack in the cable.
System Speaker Assembly
The system speakers are located on the front left and right sides of the 
bottom case assembly. Each speaker assembly is marked with a right and left 
label. Take note of the speaker cable routing in the bottom...

Removing and Replacing Parts143
1Remove the hard drive assembly.
2Remove the keyboard assembly.
3Turn the computer over and remove the display assembly.
4Remove the palm rest assembly.
5Remove the thermal cooling assembly.
6Disconnect the speaker interface cable connectors.
in-line connector
left speaker
right speaker
right speaker holder
left speaker holder
antenna cable
antenna cable 

144Removing and Replacing Parts
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 HINT: The left speaker 
has an in-line connector, 
and its cable is shorter 
than the right speaker.
 HINT: Speakers face out 
in the bottom case 
assembly holders. 7
Remove the speaker assemblies by pulling them straight up and out of 
the bottom case assembly.
Replacing the Speaker Assembly
1To replace the speaker assembly, place the mounting ring over the 
front palm rest screw post.
2Slide the speaker assembly down into the bottom case...

Removing and Replacing Parts145
 NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or 
by periodically 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 over and remove the keyboard assembly.
3Remove the display assembly.
4Remove the palm rest assembly.
5Verify that all PC Cards or plastic blanks are removed from the PC 
Card...

146Removing and Replacing Parts
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8Turn the bottom case assembly right-side up and remove the M2.5 x 5-
mm screw labeled with a white circle on the front center of the system 
board.
9Remove the speakers from the bottom case assembly.
10Pull the right side of the bottom case assembly, next to the external 
headphone and microphone connectors, away from the system board 
assembly as you simultaneously lift the front of the system board 
assembly out and away from the bottom...

Removing and Replacing Parts147
aInsert the external microphone and headphone connectors 
through the plastic bottom case assembly.
bReplace the nine M2.5 x 5-mm screws, starting on the right side of 
the bottom case assembly.
cReplace the thermal cooling fan protective cover, inserting the tab 
into the bottom case assembly and replacing the three M2 x 4-mm 
screws. If you replace the screw opposite the tab first, the other 
two screws are easier to insert and replace.
 HINT: Be sure to route 
cables so...

148Removing and Replacing Parts
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Module Latch Assemblies
Removing the Module Latch Assemblies
 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...

Removing and Replacing Parts149
3Remove the display assembly.
4Remove the palm rest assembly.
5Remove the left module latch button from the bottom case assembly 
by squeezing the snap tabs.
Apply pressure to the module latch and spring while unsnapping the 
snap tabs to prevent the module latch assembly from coming loose 
from the case. If the module latch assembly does come loose from the 
case:
aReinsert the spring onto the slider on the module latch, and 
reinstall the module latch into the holding...

150Removing and Replacing Parts
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