Service Manual
Table Of Contents
- Latitude 3520 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 I/O board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: The following image is from computers with discrete graphic card. For computers with integrated graphic card, the
system board has a different configuration.
The following image indicates the location of the I/O board and provides a visual representation of the installation procedure.
Steps
1. Align and place the I/O board into its slot on the palmrest assembly.
2. Install the two (M2x3) screws that secure the I/O board on the palmrest assembly.
3. Connect the USB cable and coin-cell cable to the connectors on the system board.
4. Connect the I/O cable to the connector on the system board and close the latch.
5. For systems shipped with power-button board, connect the power-button board cable to the connector on the I/O board,
close the latch and affix the adhesive tape.
Next steps
1. Install the ethernet port.
2. Install the base cover.
3. Exit the service mode
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.
Removing and installing components
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