Dell Inspiron Lm Service Guide

							Removing and Replacing Parts 4-15
Miscellaneous Parts (Continued)
Cover, flex-cable CVR,HNG,CTR,LMP
Insulator, expansion connector INSUL,CON,DCKG,LMP
Insulator, main board INSUL,MYLAR,I/O,LMP
Bracket, I/O BRKT,I/O,LMP
Door, I/O DOOR,I/O,LMP
Door, memory module DOOR,RAM,LMP
Guide, hard-disk drive, left GDE,RL,LF,HD,LMP
Assembly, base CVR,BTM,PLSTC,SYS,BAS,LMP
Door, expansion connector (docking 
port)DOOR,DCKG,LMP
Screws
Screw, hard-disk module, lock SCR,2X.4X8,PHH,MS,BLO
Screw, hard-disk bracket SCR,3X.5X3,FLH,PNH,MS,ZPS,HD
Screw, heat sink SCR,2X.4X6,PHH,MS,ZPS
Screw, keyboard SCR,3X.5X3,FLH,PNH,MS,ZPS,
KYBD
Screw, memory module door SCR,2X.4X5,FLH,MS,BLO
Screw, I/O panel standoff SCR,440X.23,JK,MS,ZPS
Screw, expansion connector (dock-
ing port) standoffSCR,CON,JK,DCKG,LMP
Service Documentation
Service ManualMNL,SERVICE,LMP
Technical sheet, hard-disk drive TSH,HD,LMP,ENG
Technical sheet, options bay TSH,OPT,BAY,LMP,ENG
Technical sheet, AC adapter TSH,AC ADAPT,LMP,ENG
Technical sheet, main battery TSH,BTRY,LMP,ENG
Table 4-1.  Factory Repair Parts and Assemblies (Continued)  
Part or Assembly Name Order Name 
						

							4-16 Dell Latitude LM Systems Service Manual
Service Documentation (Continued)
Technical sheet, whole unit 
replacementTSH,WUE,SVC,LMP
Technical sheet, memory module TSH,MEM,LMP,ENG
Software
Diagnostics diskette, service kit, 
U.S.KIT,DSK,DIAG,V3.58,F3,US
Diagnostics diskette, service kit, 
SpanishKIT,DSK,DIAG,V3.58,F3,SPN
Software support diskette, service kit KIT,DSK,SSD,F3,LMP
BIOS upgrade, service kit KIT,FLASH,UPG,F3,LMP/LXi
Speaker
Speaker SPKR,AUDIO,LMP
Insulator, speaker INSUL,MYLAR,SPKR,LMP
Cover, speaker CVR,SCR,SPKR,LMP
Top Case Assembly
Top case CVR,TOP,PLSTC,SYS,BASE,LMP
Button, touch pad, right BTN,TPAD,RT,LMP
Button, touch pad, left BTN,TPAD,LF,LMP
Spring, touch pad or power button SPR,PWR,KNOB,LMP
Button, power BTN,PWR,LMP
Touch Pad
Touch pad assembly ASSY,TPAD,LMP
Cable, touch pad CBL,FLEX,TPAD,LMP
Card, touch-pad switch SWT,CRD,TPAD,LMP
Card, touch pad CRD,TPAD,LMP
Insulator, touch pad INSUL,MYLAR,TPAD,LMP
Table 4-1.  Factory Repair Parts and Assemblies (Continued)  
Part or Assembly Name Order Name 
						

							Removing and Replacing Parts 4-17
Table 4-2.  Naming Conventions  
Name in This Manual Name in Other Documents
Main board Mother board assembly
Processor board CPU daughter board
Heat sink Daughter card heat-sink assembly
Inverter board Invertor PWA
Front bezel LCD bezel
Flex-cable cover  Top cover
Back bezel LCD back plastics
Bottom or base assembly Bottom plastics
Top assembly Palm rest plastics
Infrared board I/R PWA
Diskette drive Floppy-disk drive 
						

							4-18 Dell Latitude LM Systems Service Manual
Deleting the Password
If a user forgets the password and does not have it backed up on diskette, the 
user must return the computer to the factory where a service provider will delete 
the password using the following procedure. The computer will then be returned 
to the user.
Figure 4-13.  Capacitor C146 (Location) 
To delete the password, use the following procedure:
1. Open the computer and remove the keyboard.
See “Keyboard” found later in this chapter.
2. Place a short across the terminals of capacitor C146.
3. Allow time for the CMOS battery to recharge.
C146 
						

							Removing and Replacing Parts 4-19
Hard-Disk Drive
Figure 4-14.  Hard-Disk Drive Disassembly 
The hard-disk drive resides in a carrier that mounts in the computer’s hard-disk 
drive compartment on the front of the computer. Four screws secure the drive 
inside the carrier. A mylar insulator provides electrical insulation between the 
hard-disk drive and the rest of the computer. To disassemble the hard-disk drive 
from the carrier, follow these steps:
1. Remove the hard-disk drive assembly from the computer.
See step 5 of “Precautionary Measures” found earlier in this chapter.
2. Place the hard-disk drive assembly bottom side up on a work surface, 
and remove screws E1, E2, E3, and E4.
3. Remove the hard-disk drive from the carrier.
Gently pry the drive from the carrier with a small scribe. 
4. Lift the hard-disk drive out of the bottom case.
Carefully pry the flex-cable connector away from the hard-disk drive inter-
face connector on the back of the drive.
CAUTION:  Use a small flat-blade screwdriver to disconnect the
flex-cable connector. Do not handle the flex cable too roughly or you
could accidently disconnect the cable from the connector card rather
than the drive.
carrier
E1
E2E3E4 hard-disk 
drive
flex-cable 
connector
(screws E1–E6   
are 4 mm)
E5E6
4 mm 
						

							4-20 Dell Latitude LM Systems Service Manual
Diskette Drive
Figure 4-15.  Diskette Drive Assembly
The diskette drive resides in a carrier that slides into the options drive bay on 
the right side of the computer. The diskette drive and carrier are replaced as a 
unit and are not disassembled. 
diskette drive and carrier 
						

							Removing and Replacing Parts 4-21
CD-ROM
Figure 4-16.  CD-ROM Assembly   
The CD-ROM resides in a carrier that slides into the options drive bay on the 
right side of the computer. The CD-ROM and carrier are replaced as a unit and 
are not disassembled. 
CD-ROM and 
carrier 
						

							4-22 Dell Latitude LM Systems Service Manual
Memory Module
.
Figure 4-17.  Memory Module Removal
To remove a memory module, follow these steps:
1. Turn the computer over, and remove the two memory-module cover 
screws. 
2. Remove the memory module cover.
Gras
p the two memory-module retainer clips and release the memory mod-
ule. Gentl
y rotate the memory module toward you, and then pull straight up 
on the module, disconnectin
g the module from the connector on the main 
board assembl
y.
To  reinstall
 a memor
y module, both memory modules must
 be a matched pair, 
both slots must be filled, and both slots must have the same memor
y capacity. 
The followin
g combinations are possible:
•16 MB — Install two 4-MB memory modules.
•24 MB — Install two 8-MB memory modules.
•40 MB — Install two 16-MB memory modules.
MM1
MM2(screws MM1 and MM2 are 3.5 mm)
 cover
retainer clip
memory module (2)
3.5 mm 
						

							Removing and Replacing Parts 4-23
LCD Assembly
The LCD assembly consists of the display assembly and its related components. 
The subsections that follow provide removal and replacement procedures for 
the components of the LCD assembly.
Figure 4-18.  LCD Assembly Removal
To remove the LCD assembly, follow these steps:
1. With the computer closed and the back facing you, remove the two 
hinge covers.
Pop off both of the covers with the heel of your palm; or insert your finger-
tips or a scribe between each cover and the LCD assembly, and then lift the 
covers sideways until they are released from the catches holding them to the 
computer.
2. Remove hinge screws H1, H2, H3, and H4.
3. Remove the flex-cable cover. 
LCD assembly
hinge covers (2)
H1H2 H3
H4
flex-cable cover (screws H1–H4
are 5 mm)
5 mm 
						

							4-24 Dell Latitude LM Systems Service Manual
Front Bezel
NOTE:  This figure shows the STN LCD assembly, which has the same front bezel as the TFT 
LCD assembly.
Figure 4-19.  Front Bezel Removal
To remove the front bezel, follow these steps:
1. Remove the LCD assembly.
See the previous section, “LCD Assembly.”
2. With the front facing you, open the computer
3. Lay the LCD assembly back on a book or something similar to prop the 
assembly.
4. Use a scribe to pry the front-bezel screw covers out of the screw holes in 
the bezel.
5. Remove front bezel screws H6 and H7.
6. Separate the front bezel from the back bezel.
Insert your fingertips in the crevice between the front and back bezel, and 
lift up on the front bezel to release the hidden tabs spaced around the sides.
When replacing the front bezel, orient the bezel in its original position on 
the assembly and press firmly near each tab until the bezel snaps into place. 
bezel screw cover (2)
(screws H6 and H7 are 4.5 mm)
H6
H7
front bezel
hidden tabs4.5 mm