- Notes, cautions, and warnings
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw List
- Major components of your system
- Keyboard
- Solid-state drive
- Speakers
- Coin-cell battery
- Audio board
- Battery
- Display assembly
- Power-adapter port
- World-facing camera
- Heat sink
- Dummy battery cell
- System board
- Touch-panel assembly
- Display bezel
- Display panel
- Front facing camera
- Display cable
- Display hinges
- Display back cover
- Base cover assembly
- Drivers and downloads
- System setup
- Troubleshooting
- Handling swollen Lithium-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Diagnostic error messages
- System error messages
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Updating the BIOS in Windows
- Backup media and recovery options
- WiFi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
Latitude 3120/Latitude 3120 2-in-1 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
The following images indicate the location of the system board and provide a visual representation of the installation procedure.
Steps
- Replace the system board into the computer chassis.
- For systems that are shipped with a USB Type-C port, replace the four screws (M2x3) that secure the system board to the computer chassis.
- For systems that are not shipped with a USB Type-C port, replace the six screws (M2x3) that secure the system board to the computer chassis.
- Replace the coin cell battery into its sot on the system board.
- Connect the coin cell battery cable to the connector on the system board.
- Replace the USB Type-A bracket on the system board.
- Replace the two screws (M2x3) to secure the USB Type-A bracket to the system board.
- For systems that are shipped with a USB Type-C port, replace the USB Type-C bracket on the system board.
- For systems that are shipped with a USB Type-C port, replace the three screws (M2x4) to secure the USB Type-C bracket to the system board.
- Connect the speaker cable and the audio board cable to their connectors on the system board.
- Connect the power adapter port cable to its connector on the system board.
- For 2-in-1 systems, connect the touch cable to the connector on the system board.
- Connect the display cable to its connector on the system board. Close the latch to secure the cable.
- Replace the display cable bracket on the system board. Replace the singe screw (M2x3) to secure the display bracket to the system board.
- Connect the two antenna cables to the WLAN module on the system board.
- Replace the WLAN antenna cable bracket on the system board.
- Replace the singe screw (M2x3) to secure the WLAN antenna cable bracket to the system board.
Next steps
- For systems shipped with a world-facing camera, install the world-facing camera.
- Install the heatsink assembly.
- For systems that are shipped with a Solid State Drive (SSD), install the solid-state drive.
- Install the palmrest and keyboard assembly.
- Follow the procedure in after working inside your computer.
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