- Notes, cautions, and warnings
- 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
- Memory module
- M.2 solid-state drive conversion bracket
- M.2 solid-state drive thermal plate
- M.2 solid-state drive
- Hard-disk drive
- WLAN card
- WWAN card
- System fan
- Battery
- I/O cable
- Display assembly
- 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
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Latitude 3420 Service Manual
Installing the system board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
- System fan cable
- Display cable
- Power adapter cable
- Memory module connector
- Keyboard backlit LED cable
- Keyboard cable
- Touchpad cable
- Battery cable
- WLAN card connector
- Hard-disk drive cable
- USB cable
- Speaker cable
- I/O cable
- M.2 SSD connector
The following images indicate the location of the system board and provide a visual representation of the installation procedure.
Steps
- Align and place the system board into the slot on the palmrest assembly.
- Install the two (M2x2) screws to secure the system board in place.
- Align and place the type-c bracket on the system board.
- Install the two (M2x5) screws to secure the type-c bracket in place.
- Connect the display cable and I/O cable to the connector on the system board, close the latches and affix the adhesive tapes.
- Connect the touchpad cable, keyboard cable, and USB cable to the connector on the system board and close the latches.
- Connect the speaker cable, power adapter port cable, hard-disk drive cable, and system fan cable to the connector on the system board.
- For 4G LTE enabled systems, affix the WWAN I/O board cable on the palmrest assembly.
- Press the hinge in downward direction toward the palmrest assembly.
- Install the (M2.5x6) and the (M2.5x4) screws to secure the hinge to the palmrest assembly.
Next steps
- Install the heatsink assembly.
- Install the WLAN card.
- Install the hard-disk drive for systems shipped with hard-disk drive.
- Install the M.2 SSD.
- Install the memory module.
- Install the battery.
- Install the base cover.
- Install the SIM card tray for 4G LTE enabled systems.
- Install the microSD-card.
- Follow the procedure in after working inside your computer.
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