Service Manual
Table Of Contents
- Latitude 5420 Service Manual
- Contents
- Working inside your computer
- Major components of your computer
- Removing and installing components
- Recommended tools
- Screw list
- Disassembly and reassembly
- Subscriber Identity Module (SIM) card
- Micro Secure Digital (SD) Card
- Base cover
- WLAN card
- WWAN card
- Solid-state drive
- Memory modules
- Battery
- Battery cable
- Assembly inner frame
- LED board
- Heat sink
- Speakers
- System board
- Power-button board
- Smart card reader
- Keyboard assembly
- Keyboard bracket
- Display assembly
- Display bezel
- Display panel
- Camera/microphone module
- eDP/display cable
- Sensor board
- Display hinges
- Display back cover
- Dummy SIM-card slot filler
- Palm-rest assembly
- Software
- BIOS setup
- Troubleshooting
- Getting help and contacting Dell
Table 1. Latitude 5420 screw list (continued)
Component Screw type Quantity Screw image
4-cell battery M2x5 3
Heat sink—integrated
Captive screws 4
N/A
System Fan M2x5 2
eDP cable/bracket M2x3 2
USB Tyoe-C support bracket M2x5 3
System board M2x3 4
Power button M2x2.5 2
Smart card reader M2x2.5 3
Battery LED board M2x3 1
Keyboard assembly M2x2 6
Keyboard bracket M2x2 17
Display assembly M2.5x5 (display hinge to
palm-rest assembly)
4
Display hinge M2.5x3 (display hinge to
display back cover)
4
Display panel M2.5x3 2
Disassembly and reassembly
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Subscriber Identity Module (SIM) card
Removing the SIM card
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Enter service mode.
NOTE:
SIM card or SIM card tray removal is only available on systems that are shipped with WWAN module. The procedure
for removal is only applicable for systems that are shipped with a WWAN module.
Removing and installing components 15