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 10. System setup options—Power menu
Power
Wake on Dell USB-C Dock When enabled, connecting a Dell USB-C Dock will wake the system from
standby.
By default, the Wake on Dell USB-C Dock option is enabled.
Block Sleep Enables to block entering sleep (S3) mode in the operating system.
By default, the Block Sleep option is disabled.
Lid Switch Enable or disable the lid switch.
By default, the Lid Switch option is enabled.
Power On Lid Open Enables or diables system Power up from Off state when the lid is opened.
By default, the Power On Lid Open option is enabled.
Intel Speed Shift Technology Enable or disable the Intel speed shift technology support.
By default, the Intel Speed Shift Technology option is enabled.
Table 11. System setup options—Security menu (continued)
Security
TPM 2.0 Security
TPM 2.0 Security On Enable or disable TPM 2.0 security options.
By default, the TPM 2.0 Security On option is enabled.
PPI Bypass for Enable Commands Enables to control TPM Physical Presence Interface (PPI).
By default, the PPI Bypass for Enable Commands option is disabled.
PPI Bypass for Disable Commands Enables to control TPM Physical Presence Interface (PPI).
By default, the PPI Bypass for Disable Commands option is disabled.
Attestation Enable Enables to control whether the Trusted Platform Module (TPM) Endorsement
Hierarchy is available to the operating system.
By default, the Attestation Enable option is enabled.
Key Storage Enable Enables to control whether the Trusted Platform Module (TPM) Storage
Hierarchy is available to the operating system.
By default, the Key Storage Enable option is enabled.
SHA-256 BIOS and the TPM will use the SHA-256 hash algorithm to extend
measurements into the TPM PCRs during BIOS boot.
By default, the SHA-256 option is enabled.
Clear Enables to clear the TPM owner information and returns the TPM to the
default state.
By default, the Clear option is disabled.
PPI ByPass for Clear Commands Controls the TPM Physical Presence Interface (PPI).
By default, the PPI ByPass for clear Commands option is disabled.
TPM State Enables or disables TPM.
By default, the option is enabled.
Intel Software Guard Extensions
Intel SGX Enable Intel Software Guard Extensions (SGX) to provide a secured
environment for running code/storing senstive information in the context of
the main operating system.
102 System setup