Owners Manual
Manuals
Brands
Dell Manuals
3000 Series
Latitude 7400
21
22
23
24
25
26
27
28
29
30
Table Of Contents
Dell Latitude 7400 Service Manual
Contents
Working on your computer
Safety instructions
Before working inside your computer
Safety precautions
Electrostatic discharge—ESD protection
ESD field service kit
Transporting sensitive components
After working inside your computer
Technology and components
USB features
USB Type-C
HDMI 1.4a
Major components of your system
Removing and installing components
Base cover
Removing the base cover
Installing the base cover
Battery
Lithium-ion battery precautions
Removing the battery
Installing the battery
Coin cell
Removing the coin cell
Installing the coin cell
Memory
Removing the memory
Installing the memory
Solid state drive
Removing the solid state drive
Installing the solid state drive
WLAN card
Removing the WLAN card
Installing the WLAN card
WWAN card
Removing the WWAN card
Installing the WWAN card
Heatsink
Removing the heatsink fan assembly
Installing the heatsink assembly
Power adapter port
Removing the power adapter port
Installing the power adapter port
Speakers
Removing the speakers
Installing the speakers
LED board
Removing the LED daughterboard
Installing the LED daughterboard
Touchpad button board
Removing the touchpad button board
Installing the touchpad button board
Smart card reader
Removing the smart card reader
Installing the smart card reader
Display assembly
Removing the display assembly
Installing the display assembly
Hinge caps
Removing the hinge cap
Installing the hinge cap
Display hinges
Removing the hinges
Installing the hinges
Display Bezel
Removing the display bezel
Installing the display bezel
Display Panel
Removing the display panel
Installing the display panel
Camera—microphone module
Removing the camera—microphone module
Installing the camera—microphone module
Display Cable
Removing the display cable
Installing the display cable
System board
Removing the system board
Installing the system board
Power-Button Board
Removing the power-button board
Installing the power-button board
Keyboard
Removing the keyboard
Installing the keyboard
Palmrest
System setup
BIOS overview
Entering BIOS setup program
Navigation keys
One time boot menu
System setup options
General options
System configuration
Video screen options
Security
Secure boot
Intel Software Guard Extensions options
Performance
Power management
Post behavior
Manageability
Virtualization support
Wireless options
Maintenance
System logs
Updating the BIOS
Updating the BIOS in Windows
Updating the BIOS in Linux and Ubuntu
Updating the BIOS using the USB drive in Windows
Updating the BIOS from the F12 One-Time boot menu
System and setup password
Assigning a system setup password
Deleting or changing an existing system setup password
Clearing CMOS settings
Clearing BIOS (System Setup) and System passwords
Troubleshooting
Handling swollen Lithium-ion batteries
Dell SupportAssist Pre-boot System Performance Check diagnostics
Running the SupportAssist Pre-Boot System Performance Check
Built-in self-test (BIST)
M-BIST
LCD Power rail test (L-BIST)
LCD Built-in Self Test (BIST)
System-diagnostic lights
Recovering the operating system
Backup media and recovery options
WiFi power cycle
Drain residual flea power (perform hard reset)
Getting help
Contacting Dell
3
.
D
i
s
c
o
n
n
e
c
t
t
h
e
c
o
i
n
c
e
l
l
c
a
b
l
e
f
r
o
m
t
h
e
c
o
n
n
e
c
t
o
r
o
n
t
h
e
s
y
s
t
e
m
b
o
a
r
d
[
1
]
.
4
.
R
e
m
o
v
e
t
h
e
c
o
i
n
c
e
l
l
f
r
o
m
t
h
e
c
o
m
p
u
t
e
r
[
2
]
.
R
e
m
o
v
i
n
g
a
n
d
i
n
s
t
a
l
l
i
n
g
c
o
m
p
o
n
e
n
t
s
2
5
1
...
...
23
24
25
26
27
...
...
112
