Service Manual
Table Of Contents
- Latitude 3420 Service Manual
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw List
- Major components of your system
- MicroSD-card
- SIM card tray
- Base cover
- Battery cable
- Battery
- Memory module
- M.2 solid-state drive thermal plate
- M.2 solid-state drive conversion bracket
- M.2 solid-state drive
- Hard-disk drive
- WLAN card
- WWAN card
- I/O cable
- Display assembly
- System fan
- Heatsink assembly
- Power adapter port
- Coin-cell battery
- USB cable
- Ethernet port
- I/O board
- Power-button board
- System board
- Speakers
- Touchpad
- WWAN I/O board
- Palmrest assembly
- Display bezel
- Display panel
- Camera
- Display cable
- Display back-cover
- Drivers and downloads
- System setup
- Troubleshooting
- Built-in self-test (BIST)
- LCD Built-in Self Test (BIST)
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Diagnostic LED behavior
- Diagnostic error messages
- System error messages
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Flashing the BIOS
- Backup media and recovery options
- WiFi power cycle
- Flea power release
- Getting help and contacting Dell
7. Remove the M.2 SSD.
8. Remove the M.2 SSD thermal plate.
9. Remove the M.2 SSD conversion bracket.
10. Remove the hard-disk drive.
11. Remove the WLAN card.
12. Remove the WWAN card for systems enabled with 4G LTE.
13. Remove the I/O board cable.
14. Remove the display assembly.
15. Remove the system fan.
16. Remove the heatsink assembly.
17. Remove the power adapter port.
18. Remove the I/O board.
19. Remove the coin-cell battery.
20. Remove the USB cable.
21. Remove the WWAN I/O board for systems enabled with 4G LTE.
22. Remove the system board.
NOTE: The system board can be removed along with the heat sink.
About this task
The following images indicate the location of the palmrest assembly.
Steps
After performing the preceding steps, you are left with the palmrest assembly.
Installing the palmrest assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the palmrest assembly.
Removing and installing components
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