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
4. Unroute the speaker cable from the routing guides in the palmrest assembly.
5. Peel the adhesive tapes, lift and remove the speakers off the palmrest assembly.
Installing the speaker
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 speakers and provides a visual representation of the installation procedure.
Steps
1. Align and place the speakers into the slot on the palmrest assembly.
2. Route the speaker cable through the routing guides in the palmrest assembly.
3. Connect the speaker cable to the connector on the system board.
4. Affix the adhesive tapes to secure the speakers in place.
5. Connect the hard-disk drive cable to the connector on the system board.
6. Connect the touchpad cable, keyboard cable, keyboard backlit LED cable, and USB cable to the connectors on the system
board and close the latches.
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Removing and installing components