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
Steps
After performing the succeeding steps, you are left with the palmrest assembly.
Next steps
1. Install the system board.
2. Install the WWAN I/O board for systems enabled with 4G LTE.
3. Install the USB cable.
4. Install the coin-cell battery.
5. Install the I/O board.
6. Install the power adapter port.
7. Install the heatsink assembly.
8. Install the system fan.
9. Install the display assembly.
10. Install the I/O board cable.
11. Install the WWAN card for systems enabled with 4G LTE.
12. Install the WLAN card.
13. Install the hard-disk drive.
14. Install the M.2 SSD conversion bracket.
15. Install the M.2 SSD thermal plate.
16. Install the M.2 SSD.
17. Install the memory module.
18. Install the battery.
19. Install the base cover.
20. Install the SIM card tray for 4G LTE enabled systems.
21. Install the microSD-card.
22. Follow the procedure in after working inside your computer.
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Removing and installing components