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
Chapter 1: Working inside your computer...................................................................................... 5
Before working inside your computer.............................................................................................................................5
Safety precautions.............................................................................................................................................................. 5
Enter service mode............................................................................................................................................................. 6
Electrostatic discharge—ESD protection..................................................................................................................... 8
ESD field service kit ...........................................................................................................................................................9
After working inside your computer................................................................................................................................9
Chapter 2: Major components of your computer........................................................................... 11
Chapter 3: Removing and installing components.......................................................................... 14
Recommended tools..........................................................................................................................................................14
Screw list..............................................................................................................................................................................14
Disassembly and reassembly .......................................................................................................................................... 15
Subscriber Identity Module (SIM) card.................................................................................................................. 15
Micro Secure Digital (SD) Card................................................................................................................................ 17
Base cover..................................................................................................................................................................... 19
WLAN card....................................................................................................................................................................22
WWAN card.................................................................................................................................................................. 25
Solid-state drive...........................................................................................................................................................27
Memory modules.......................................................................................................................................................... 31
Battery........................................................................................................................................................................... 32
Battery cable................................................................................................................................................................ 36
Assembly inner frame................................................................................................................................................. 38
LED board.......................................................................................................................................................................41
Heat sink........................................................................................................................................................................43
Speakers........................................................................................................................................................................ 45
System board................................................................................................................................................................47
Power-button board....................................................................................................................................................51
Smart card reader....................................................................................................................................................... 53
Keyboard assembly..................................................................................................................................................... 55
Keyboard bracket........................................................................................................................................................ 57
Display assembly..........................................................................................................................................................59
Display bezel................................................................................................................................................................. 63
Display panel.................................................................................................................................................................65
Camera/microphone module.................................................................................................................................... 72
eDP/display cable........................................................................................................................................................73
Sensor board.................................................................................................................................................................76
Display hinges............................................................................................................................................................... 77
Display back cover...................................................................................................................................................... 80
Dummy SIM-card slot filler........................................................................................................................................ 81
Palm-rest assembly.....................................................................................................................................................84
Chapter 4: Software.................................................................................................................... 86
Contents
Contents 3