Dell Inspiron Lm Service Guide

							Removing and Replacing Parts 4-35
Status Display Board
Figure 4-28.  Status Display Board Removal
To remove the status display board, follow these steps:
1. Remove the top assembly.
See “Top Assembly” found earlier in this section.
2. Remove status-display board screws S7, S8, and S9.
3. Disconnect the two speaker connectors and the infrared device connec-
tor from the status display board.
4. Disconnect the status display board connector from the main board.
The connector wire assembly is held in place by a metal hook located on the 
I/O bracket.
5. Remove the status display board from the top assembly.
status display 
board (screws S7–S9 
are 6 mm) speaker
connector (2)infrared 
device 
connector
status-
display 
board 
connector S7
S8
S9 top assembly
6 mm 
						

							4-36 Dell Latitude LM Systems Service Manual
I/R Device
Figure 4-29.  I/R Device Removal    
To remove the infrared (I/R) device, follow these steps:
1. Remove the top assembly.
See “Top Assembly” found earlier in this section.
2. Disconnect the I/R device connector from the status display board.
3. Dislodge the I/R device from the recess on the top assembly.
Thread the I/R connector and wires through the opening on the top 
assembly.
4. Remove the I/R device from the top assembly.
top assembly
I/R connector
recess
I/R lens 
						

							Removing and Replacing Parts 4-37
Power Button
Figure 4-30.  Power Button Removal
To remove the power button, follow these steps:
1. Remove the top assembly.
See “Top Assembly” found earlier in this section.
2. Remove the status display board.
See “Status Display Board” found earlier in this section.
3. Remove power button.
There are four plastic retainers that hold the power button and spring in 
place.
4. Remove the power button and spring from the top assembly.
power button
spring 
						

							4-38 Dell Latitude LM Systems Service Manual
Touch Pad
Figure 4-31.  Touch Pad Removal
To remove the touch pad, follow these steps:
1. Remove the top assembly and turn it over.
See “Top Assembly” found earlier in this section.
2. Remove touch pad screws S11, S12, and S13.
Place the touch-pad button board to one side. The board has a flex cable that 
attaches to the touch pad. 
3. Remove the touch pad buttons.
Press down on the touch-pad button projections, and pull the touch pad but-
ton out of the recess on the front of the top assembly.
4. Remove touch-pad bracket screws S14 and S15.
Remove the touch pad bracket.
5. Remove the touch pad bracket and touch pad from the top assembly.
top 
assembly
(screws S11–
S15 are 3 mm)
S11
S12
S13S15 S14
touch-pad 
button board touch pad 
bracket touch pad 
flex cabletouch-pad 
cable connector button (2)
3 mm 
						

							Removing and Replacing Parts 4-39
Bottom Assembly
This bottom assembly consists of a plastic base, the main board, and the main 
board components. The subsections that follow provide removal and replace-
ment procedures for the components of the bottom assembly.
 
Figure 4-32.  Bottom Assembly 
cache board
base main board audio boardpower supply 
board
options 
bay wall processor 
board 
						

							4-40 Dell Latitude LM Systems Service Manual
Processor Board
Figure 4-33.  Processor Board Removal
To remove the processor board, follow these steps:
1. Open the cover.
2. Remove the keyboard.
See “Keyboard” found earlier in this chapter.
3. Remove the processor board from the main board.
The processor board is held in place on the main board by two connectors. 
Use a chip removal tool to remove the processor board.
main board
processor board
processor board connector (2) 
						

							Removing and Replacing Parts 4-41
Power Supply Board
Figure 4-34.  Power Supply Board Removal
To remove the power supply board, follow these steps:
1. Open the cover.
2. Remove the top assembly.
See “Top Assembly” found earlier in this chapter.
3. Remove the power supply board from the main board.
The power supply board is held in place on the main board by two 
connectors.
power supply 
board
main board 
						

							4-42 Dell Latitude LM Systems Service Manual
Audio Board
Figure 4-35.  Audio Board Removal
To remove the audio board, follow these steps:
1. Open the cover.
2. Remove the top assembly.
See “Top Assembly” found earlier in this chapter.
3. Remove the cable from the audio board.
4. Remove the audio board from the main board.
The audio board is held in place on the main board by a connector on one 
side of the audio board. On the other side of the main board, the audio board 
is held in place by a clasp and two projections. The clasp and projections are 
on a plastic holder. Lift out the plastic holder.
audio board
main board
plastic holder
audio cable
audio boardconnector 
						

							Removing and Replacing Parts 4-43
Main Board
Figure 4-36.  Main Board Removal  
To remove the main board, follow these steps:
1. Open the cover.
2. Remove the top assembly.
See “Top Assembly” found earlier in this chapter.
3. Remove the power supply board.
See “Power Supply Board” found earlier in this section.
4. Remove the audio card.
See the previous subsection, “Audio Board.”
5. Remove the black mylar cover on the PC Card cage.
(screws S19– 
S20 are 5 mm)(screws ST1–ST6
are 6.5 mm)
(screw ST9 
is 4 mm)main boardI/O panel 
cover
S17
S16 S18
S19
S20 ST9ST6
ST2 ST3 ST4 ST5 ST7
ST1 S8
I/O panel 
bracket
(screw S18 
is 8 mm)
(screws ST7 and 
ST8 are 4.5 mm) (screws S16 and 
S17 are 4 mm)
6 mm
5 mm
4 mm
4 mm
6.5 mm
4.5 mm 
						

							4-44 Dell Latitude LM Systems Service Manual
6. Turn the computer around, open the I/O panel cover, and remove  
standoff nuts ST1, ST2, ST3, ST4, ST5, ST6, ST7, and ST8.
Use a 
3/16 nut driver to remove standoff nuts ST1 through ST6 and a 7/32 nut 
driver for ST7 and ST8.
7. Remove cover alignment screws S16 and S17.
8. Remove main board screws S18, S19, S20, and ST9.
S18 has a corner brace that must be removed. ST9 is a standoff screw and 
requires a 
5/32 nut driver.
9. Bend the options bay wall (see Figure 4-32).
Press gently on the ends of the wall just enough to free the option bay con-
nectors on the main board. Be careful not to bend the wall in the middle. 
When reinstalling the main board, bend the wall back to the vertical 
position.
10. Remove the main board.
Lift the end of the board nearest the front of the computer, and pull the 
board up and out of the computer.