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
1. Align and place the system chassis under the hinges of the display assembly.
2. Press the left and right hinges in downward direction toward the palmrest assembly.
3. Install the three (M2.5x6) and two (M2.5x4) screws to secure the display hinges to the palmrest assembly.
4. Connect the display cable to the connector on the system board and close the latch.
5. Route the display cable through the routing guides in the palmrest assembly.
6. Affix the adhesive tape to secures the display cable in place.
Next steps
1. Install the I/O cable.
2. Install the WWAN card for systems enabled with 4G LTE.
3. Install the WLAN card.
4. Install the M.2 SSD conversion bracket for systems enabled with 4G LTE.
5. Install the M.2 SSD thermal plate for systems enabled with 4G LTE.
6. Install the M.2 SSD for systems enabled with 4G LTE.
7. Install the base cover.
8. Exit the service mode
9. Install the SIM card tray for 4G LTE enabled systems.
10. Install the microSD-card.
Removing and installing components
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