Dell Inspiron L400 Service Guide

support.dell.com Dell Latitude L400 Service Manual 27
Speaker
Figure 21.  Speaker Removal 
1. Remove the keyboard bezel.
2. Remove the display assembly.
3. Remove the keyboard assembly.
4. Remove the palmrest assembly.
NOTICE: To ensure maximum cooling for the microprocessor, do not 
touch the glue side of the thermal conductive tape. The oils in your 
skin reduce the heat transfer capability on the glue side of the tape. 
5. Peel up the EMI adhesive sponge that connects the audio EMI shield to 
the...

28 Dell Latitude L400 Service Manual
NOTICE: The audio EMI shield is attached to the USB connector   
housing with two-sided tape. To avoid bending the audio EMI shield, 
care must be taken when separating the audio EMI shield from the 
USB connector housing.
6. Using a small flat-blade screwdriver, carefully separate the audio EMI 
shield away from the USB connector housing.
Place the edge of the screwdriver between the audio EMI shield and the 
USB connector housing, and slowly pry the two apart.
7....

support.dell.com Dell Latitude L400 Service Manual 29
7. Reinstall the palmrest assembly.
8. Reinstall the keyboard assembly.
9. Reinstall the display assembly.
10. Reinstall the keyboard bezel.
System Board Assembly 
6
Figure 22.  System Board Assembly Removal 
To remove the system board assembly, perform the following steps.
NOTICE: If the EMI sponge located between the battery bay and the 
USB connector becomes dislodged, reinsert it.
PC Card cover
system board
fan assembly
M2 x 9.5-mm screw
audio I/O...

30 Dell Latitude L400 Service Manual
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
NOTICE: The processor is not replaceable. Do not attempt to remove 
the thermal cooling solution.
1. Remove the keyboard bezel.
2. Remove the display assembly.
3. Remove the keyboard.
4. Remove the palmrest assembly.
5. Use a 5-mm socket wrench to remove the four 5-mm socket screws for the 
VGA and parallel ports located on the back of the bottom case...

support.dell.com Dell Latitude L400 Service Manual 31
13. Remove the modem retainer bracket from the bottom case assembly.
14. Disconnect the speaker wire from the connector on the system board 
assembly.
15. Disconnect the fan wire from the connector on the system board 
assembly.
16. Lift the system board assembly out of the bottom case assembly.
To replace the system board assembly, perform the following steps:
1. Transfer the memory module(s) to the replacement system board 
assembly.
2. Place the...

32 Dell Latitude L400 Service Manual
One of the M2 x 3.5-mm screws passes through the hard-disk drive EMI 
clip (see Figure 23).
9. Reinstall the audio EMI shield.
a. Carefully position the audio EMI shield so the section with the         
two-sided tape is over the USB connector housing. 
b. Press the audio EMI shield down so it attaches to the USB connector 
housing. 
c. Reattach the EMI adhesive sponge across the thermal cooling solution.
10. Reinstall the two IDE connector screws at both ends of the...

support.dell.com Dell Latitude L400 Service Manual 33
1. Remove the keyboard bezel.
2. Remove the display assembly.
3. Remove the keyboard.
4. Remove the palmrest assembly.
5. Remove the system board.
NOTICE: The tabs on the release button are plastic. Care should be 
taken when squeezing the tabs to avoid breaking them.
6. Using needle-nose pliers, gently squeeze the two tabs on the back of the 
release button together and grasp the top of the battery release latch and 
gently pull up to free it from...

34 Dell Latitude L400 Service Manual
To replace the APR docking doors, perform the following steps.
NOTE: On the under side of the doors, a small F is printed on the front door 
and a small B is printed on the back door. As you hold the doors for installation, 
the front door is near you, the back door is away from you, and the tension 
spring is to the left.
1. Turn the computer upside down.
The APR connector door opening should be at the top.
2. Holding the two doors together at their right edges,...

Index 1
Index
A
APR docking doors removal, 33
B
bottom assembly
components, 
22
illustrated, 22
D
display assembly
bezel removal, 
11
hinge removal, 15
latch removal, 12
removal, 9
F
fan removal, 25
field-replaceable parts and 
assemblies illustrated, 
6
G
grounding to dissipate static 
electricity, 
3
H
hard-disk drive assembly removal, 7
hinge removal, 15
K
keyboard assembly removal, 16
L
latch removal, 12
LCD panel removal, 13
M
main battery
release latch removal, 
32
removal, 3, 23
memory module...

2 Dell Latitude L400 Service Manual
R
reserve battery removal, 23
S
screw identification and tightening, 3
speaker removal, 27
system board assembly
removal, 
29
T
tools, 2
touch pad removal, 21
Z
ZIF connectors, 5