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
Table 9. System setup options—Connection menu
Connection
WWAN/GPS (For systems with
integrated video card only)
Enable or disable the internal WWAN/GPS device. By default, the option
enabled.
WLAN Enable or disable the internal WLAN device.
By default, the option enabled.
Bluetooth Enable or disable the internal Bluetooth device.
By default, the option enabled.
Enable UEFI Network Stack Enable or disable UEFI Network Stack.
By default, the Enable UEFI Network Stack option is enabled.
Wireless Radio Control
Control WLAN radio Sense the connection of the system to a wired network and subsequently
disable the selected wireless radios (WLAN).
By default, the option is disabled.
Control WWAN radio Sense the connection of the system to a wired network and subsequently
disable the selected wireless radios (WWAN).
By default, the option is disabled.
HTTPs Boot Feature(For systems with
discrete video card only)
HTTPs Boot Enable or disable the HTTPs Boot feature.
By default, the HTTPs Boot option is enabled.
Table 10. System setup options—Power menu
Power
Battery configuration Enables the system to run on battery during peak power usage hours. Use the
table Custom Charge Start and Custom Charge Stop, to prevent AC power
usage between certain times of each day.
By default, the Adaptive option is enabled.
Advanced Configuration
Enable Advanced Battery Charge
Configuration
Enable or disable the advanced battery charge configuration.
By default, the Enable Advanced Battery Charge Configuration option is
disabled.
Peak Shift Enables the system to run on battery during peak power usage hours.
Enable Peak Shift
By default, the Enable Peak Shift option is disabled.
USB PowerShare
Enable USB PowerShare Enable or disable the USB PowerShare.
By default, the Enable USB PowerShare option is disabled
Thermal Management Enables to cool the fan and processor heat management to adjust the system
performance, noise, and temperature.
By default, the Optimized option is enabled.
USB Wake Support
Enable USB Wake Support Enables USB wake support.
By default, the Enable USB Wake Support option is disabled.
System setup 101