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
Installing the touchpad
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the touchpad and provides a visual representation of the installation procedure.
Steps
1. Align and place the touchpad module into the slot on the palmrest assembly.
2. Install the four (M2x2) screws to secure the touchpad module to the palmrest assembly.
3. Align and place the touchpad bracket on the touchpad module.
4. Install the three (M2.5x2) screws to secure the touchpad bracket to the touchpad module.
5. Affix the adhesive tapes to secure the touchpad module in place.
6. Connect the touchpad cable to the connector on the system board and close the latch.
Next steps
1. Install the speakers.
2. Install the battery.
3. Install the base cover.
4. Install the SIM card tray for 4G LTE enabled systems.
5. Install the microSD-card.
6. Follow the procedure in after working inside your computer.
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Removing and installing components