Dell Inspiron 3000 Service Manual

Removing and Replacing Parts 4-45
Base Assembly
The base assembly consists of the following components: 
•IR lens
•Processor board
•LVDS board (13.3-inch LCD only)
•USB board
•Main board
•Audio bezel
•Audio board
•PC Card cage
•Latch assembly
•BIOS door
•Rubber feet
The following subsections provide removal and replacement procedures for 
most of the components of the base assembly. Procedures for the BIOS door, 
rubber feet, and 13.3-inch bumpers are not shown because they are obvious. 
The procedures...

4-46 Dell Inspiron 3000 Series Service Manual
 
Figure 4-29.  Base Assembly 
base assembly
main board
audio board
LVDS board(13.3-inch LCD only)
IR lens
processor board
audio bezel
PC Card cage
USB boardconnector JP16 

Removing and Replacing Parts 4-47
IR Lens
Figure 4-30.  IR Lens Removal 
Remove the IR lens by gently pulling straight up on the lens with the fingers of 
one hand.   
IR lens 

4-48 Dell Inspiron 3000 Series Service Manual
Processor Board
Figure 4-31.  Processor Board Removal
Remove the processor board from the main board.
The processor board is held in place on the main board by connectors JP18 and 
JP19. Using the fingers of one hand, gently remove the processor board from 
the main board by pulling straight up. Do not rock the processor board to 
remove it. This may damage the two connectors on the processor board or the 
main board. 
There is a rubber bumper on the upper...

Removing and Replacing Parts 4-49
LVD S B o a rd
The LVDS board is present on computers with a 13.3-inch LCD. If you have a 
12.1-inch LCD, skip this subsection.  
Figure 4-32.  LVDS Board Removal
To remove the LVDS board, follow these steps:
1. Remove LVDS board screw G2.
This is the other screw that you left in place when you removed the 
13.3-inch LCD cable harness from connector JP1 on the LVDS board.
2. Remove the LVDS board from the main board.
The LVDS board is held in place on the main board by...

4-50 Dell Inspiron 3000 Series Service Manual
USB Board
Figure 4-33.  USB Board Removal
To remove the USB board, follow these steps:
1. Remove USB board screw U1.
2. Disconnect the USB board from connector JP9 on the main board.
With the fingers of one hand, gently pull the USB board straight up about 
1/4-inch to free it from connector JP9. Then turn the board slightly to the 
right to remove it from the corner of the main board and the base assembly. 
(screw U1is 5 mm)
5 mm
U1
connector JP9
USB board 

Removing and Replacing Parts 4-51
Main Board
Figure 4-34.  Main Board Removal 
To remove the main board, follow these steps:
1. Remove the processor board.
2. If one is installed, remove the LVDS board. Otherwise, go to step 3.
3. Remove the USB board.
4. Remove main board screws M1, M2, and M3.
5. Remove standoff nuts ST1, ST2, and ST3.
6. Remove the main board from the base assembly.
Lift the end of the board nearest the front of the computer, and pull the 
board up and out of the computer.
Remove the...

4-52 Dell Inspiron 3000 Series Service Manual
Audio Bezel
Figure 4-35.  Audio Bezel Removal
Remove the audio bezel by gently pulling it from the three audio jacks on the 
left side of the main board. This bezel usually drops out when the main board is 
removed from the computer.
audio bezel 

Removing and Replacing Parts 4-53
Audio Board
Figure 4-36.  Audio Board Removal 
To remove the audio board, follow these steps:
1. Remove the main board.
2. Remove the audio board from the bottom of the main board.
The audio board is held in place by two connectors on the main board (JP26 
and JP22) and two connectors on the audio board (JP1 and JP2). The con-
nectors are different sized to ensure correct placement when reinstalling the 
audio board. 
Ensure that you reinstall the audio board when you...

4-54 Dell Inspiron 3000 Series Service Manual
PC Card Cage
Figure 4-37.  PC Card Cage Removal 
To remove the PC card cage, follow these steps:
1. Remove the main board.
Use a support for the main board to prevent the board from flexing when the 
card cage screws are removed
2. Remove PC Card cage screws P1, P2, P3, and P4.
Screws P2 and P4 have ground springs attached. There are plastic insulators 
on the main board, below the ground springs.
3. Remove the top of the card cage.
Disconnect the top from...