Dell Inspiron L400 Service Guide

support.dell.com Dell Latitude L400 Service Manual 7
The following subsections provide instructions for removing and replacing 
field-replaceable parts and assemblies.
Hard-Disk Drive Assembly
Figure 6.  Hard-Disk Drive Assembly Removal 
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
NOTICE: The hard-disk drive is very sensitive to shock. Handle the 
assembly by its edges (do not squeeze the top of the hard-disk drive 
case), and avoid...

8 Dell Latitude L400 Service Manual
Keyboard Bezel
Figure 7.  Keyboard Bezel Removal
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
NOTICE: To avoid damaging the microphone, do not put any objects 
into the microphone hole (see Figure 7).
1. Place the point of a paper clip or a tool of similar size in the keyboard bezel 
hole and carefully push down (see Figure 7).
2. While pushing down, slide the keyboard bezel to the left until it...

support.dell.com Dell Latitude L400 Service Manual 9
Display Assembly 
Figure 8.  Display Assembly Removal
NOTICE: To avoid damaging the system board, you must remove the 
battery before you service the computer.
1. Remove the keyboard bezel.
2. Close the display.
3. Remove the two silver M2 x 4-mm screws at the back of the computer that 
secure the display assembly to the bottom case (see Figure 8).
4. Turn the computer upside down on a flat work surface.
5. Remove the two M2 x 4.5-mm screws at the...

10 Dell Latitude L400 Service Manual
6. Turn the computer right-side up.
7. Open the display.
8. Remove the left and right hinge covers.
NOTE: When replacing the display assembly, the left hinge cover must go 
over the left hinge and the right hinge cover must go over the right hinge. 
They are not interchangeable. An L is stamped on the bottom of the left 
hinge cover and an R is stamped on the bottom of the right hinge cover.
9. Remove the M2 x 9.5-mm screw that secures the LCD flex-cable...

support.dell.com Dell Latitude L400 Service Manual 11
7. Reinstall the two M2 x 4-mm screws in the back of the computer that 
secure the display assembly to the back of the bottom case.
8. Tighten the two screws that you installed in step 6.
9. Open the display and reinstall the left and right hinge covers.
An L is stamped on the bottom of the left hinge cover and an R is stamped 
on the bottom of the right hinge cover.
Display Assembly Bezel
l
Figure 9.  Display Assembly Bezel Removal
LCD panel...

12 Dell Latitude L400 Service Manual
NOTICE: To avoid damaging the system board, you must remove the 
main battery before you service the computer.
1. Use a scribe to carefully pry the six rubber screw covers out of the six 
screw holes located along the top and bottom of the bezel on the front of 
the display assembly (see Figure 9).
2. Remove the six M2 x 3.5-mm screws located at the top and bottom of the 
bezel on the front of the display assembly (see Figure 9).
3. Separate the bezel from the...

support.dell.com Dell Latitude L400 Service Manual 13
To replace the display-assembly latch, perform the following steps:
1. Carefully place the latch spring over the post on the display-assembly top 
cover.
You may need to use a small flat-blade screwdriver to place the spring over 
the post. Hold the spring on the post with the screwdriver while 
performing the next step.
2. Holding the latch, stretch the spring slightly and set the display-assembly 
latch in place in the display assembly top cover.
3....

14 Dell Latitude L400 Service Manual
2. Remove the keyboard bezel.
3. Remove the display assembly.
4. Remove the display assembly bezel.
5. Remove the four M2 x 3.5-mm screws on the left and right sides of         
the display assembly that secure the LCD panel to the top cover             
(see Figure 11).
6. Remove the M2 x 3.5-mm screw that secures the inverter to the top cover. 
7. Lift and roll the inverter over (toward you), so the bezel side is down and 
the connector side is up (see Figure 11)....

support.dell.com Dell Latitude L400 Service Manual 15
b. Lower the bottom end of the LCD panel into the top cover, making sure 
the LCD flex cable lines up with the opening that is to the right of the 
left hinge.  
c. Make sure the narrow part of the flex cable that goes to the inverter is 
visible at the bottom edge of the LCD panel. 
d. Press the LCD panel into the top cover.
5. Connect the narrow flex cable to the ZIF connector on the left side of the 
inverter.
6. With the connector side of the...

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Keyboard Assembly
 
Figure 12.  Keyboard Assembly Removal
To remove the keyboard assembly, perform the following steps.
NOTICE: To avoid damaging the system board, you must remove    
the main battery before you service the computer.
NOTICE: Make sure that the work surface is clean to prevent          
scratching the computer cover.
1. Remove the keyboard bezel.
2. Remove the four M2 x 4-mm screws located across the top of the 
keyboard assembly (see Figure 9).
NOTE:...