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 7. System setup options—Storage menu
Storage
Storage interface
Port Enablement This page allows you to enable the onboard drives.
By default, the SATA-1 option is enabled.
By default, the M.2 PCIe SSD-1 option is enabled.
SMART Reporting
Enable SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology
(SMART) during system startup.
By default, the Enable SMART Reporting option is disabled.
Drive Information
SATA-1
Type Displays the SATA type information of the system.
Device Displays the SATA device information of the system.
M.2 PCIe SSD-1
Type Displays the M.2 PCIe SSD type information of the system.
Device Displays the M.2 PCIe SSD device information of the system.
Enable Hard Drive Free Fall
Protection
Enable Hard Drive Free Fall Protection Allows you to enable Hard Drive Free Fall Protection feature.
By default, the Enable Hard Drive Free Fall Protection option is selected.
Enable MediaCard Enable or disable the media card in read-only state.
By default, the Secure Digital (SD) Card option is enabled.
Table 8. System setup options—Display menu
Display
Display Brightness
Brightness on battery power Enable to set screen brightness when the system is running on battery power.
Brightness on AC power Enable to set screen brightness when the system is running on AC power.
Touchscreen (For systems with discrete
video card only)
Enable or disable touchscreen for the operating system. Touchscreen will
always work in the BIOS setup irrespective of this setting. This option is
enabled by default.
EcoPower
Enable EcoPower Enable or disabled EcoPower feature. This option is enabled by default.
Full Screen Logo Enable or disable full screen logo.
By default, the option is disabled.
Table 9. System setup options—Connection menu
Connection
Network Controller Configuration
Integrated NIC If enabled, UEFI network protocols are installed and available, allowing pre-OS
and early OS networking features to use any enabled NICs. The option Enable
with PXE is enabled by default.
Wireless Device Enable
100 System setup