Dell Latitude 9420 Service Manual Download Page 29

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Next steps

1. Install the

2. Install the

3. Install the

4. Exit

5. Follow the procedure in

After working on your computer

Display assembly

Removing the display assembly

Prerequisites

1. Follow the procedure in

before working inside your computer

2. Remove the

3. Remove the

4. Enter

5. Remove the

About this task

The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.

NOTE:

The display assembly removal procedure is the same for both laptop and 2-in-1 chassis.

Removing and installing components

Summary of Contents for Latitude 9420

Page 1: ...Latitude 9420 Service Manual Regulatory Model P141G P142G Regulatory Type P141G001 P142G001 April 2021 Rev A00 ...

Page 2: ...ential damage to hardware or loss of data and tells you how to avoid the problem WARNING A WARNING indicates a potential for property damage personal injury or death 2021 Dell Inc or its subsidiaries All rights reserved Dell EMC and other trademarks are trademarks of Dell Inc or its subsidiaries Other trademarks may be trademarks of their respective owners ...

Page 3: ...Installing the SIM card tray 16 Base cover 17 Removing the base cover 17 Installing the base cover 19 Solid state drive 20 Removing the solid state drive 20 Installing the solid state drive 21 Wireless Wide Area Network WWAN Card 22 Removing the WWAN card 22 Installing the WWAN card 24 System fan 25 Removing the system fan 25 Installing the system fan 26 Heat sink 27 Removing the heat sink 27 Inst...

Page 4: ...SH daughter board 51 Installing the USH daughter board 52 Wireless Wide Area Network WWAN Antenna module 53 Removing the WWAN main antenna module 53 Installing the WWAN main antenna module 54 Palm rest assembly 55 Removing the palm rest assembly 55 Installing the palm rest assembly 56 Chapter 3 Software 58 Downloading the drivers 58 Chapter 4 System setup 59 BIOS overview 59 Entering BIOS setup pr...

Page 5: ... 78 Deleting or changing an existing system setup password 79 ExpressSign in 79 Chapter 5 Troubleshooting 83 Dell SupportAssist Pre boot System Performance Check diagnostics 83 Running the SupportAssist Pre Boot System Performance Check 83 System diagnostic lights 83 Diagnostic error messages 85 System error messages 88 Wi Fi power cycle 88 Chapter 6 Getting help and contacting Dell 89 Contents 5 ...

Page 6: ...cautions The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions Observe the following safety precautions before you perform any installation or break fix procedures involving disassembly or reassembly Turn off the system and all attached peripherals Disconnect the system and all attached peripherals from AC power Disconnect all network c...

Page 7: ...from the system board To exit Service Mode 1 Connect the AC adapter to the power adapter port on your computer 2 Press the power button to turn on the computer Your computer will automatically return to normal functioning mode Electrostatic discharge ESD protection ESD is a major concern when you handle electronic components especially sensitive components such as expansion cards processors memory...

Page 8: ...all and at a minimum test once per week A wrist strap tester is the best method for doing this test If you do not have your own wrist strap tester check with your regional office to find out if they have one To perform the test plug the wrist strap s bonding wire into the tester while it is strapped to your wrist and push the button to test A green LED is lit if the test is successful a red LED is...

Page 9: ...e that no stray screws remain inside your computer 2 Connect any external devices peripherals or cables you removed before working on your computer 3 Replace any media cards discs or any other parts that you removed before working on your computer 4 Connect your computer and all attached devices to their electrical outlets 5 Turn on your computer Working inside your computer 9 ...

Page 10: ...etwork WWAN Card System fan Heat sink Display assembly Battery Speakers Wireless Local Area Network WLAN Antenna module I O daughter board Power button with fingerprint reader assembly System board USH daughter board Wireless Wide Area Network WWAN Antenna module Palm rest assembly Recommended tools The procedures in this document may require the following tools Phillips 0 screwdriver Phillips 1 s...

Page 11: ...mponent is replaced NOTE Some systems have magnetic surfaces Ensure that the screws are not left attached to such surface when replacing a component NOTE Screw color may vary with the configuration ordered Table 1 Screw list Component Screw type Quantity Image Base cover Captive screws 8 Solid state drive M1 6x2 5 1 WWAN card Captive screw 1 System fan M1 6x2 5 2 Heat sink Captive screws 3 N A Dis...

Page 12: ...1 Right speaker M1 6x1 8 1 WLAN antenna module M1 6x1 8 1 M1 6x3 2 I O daughter board M2x4 1 Power button with fingerprint reader assembly M1 6x2 5 3 System board M1 6x2 5 4 M2x4 3 Captive screw 1 N A USH daughter board M1 2x2 5 2 WWAN main antenna module M1 6x3 4 12 Removing and installing components ...

Page 13: ...rd 7 System board 8 Wireless Local Area Network WLAN Antenna module 9 Left speaker 10 Palm rest assembly 11 Display assembly 12 Right speaker 13 Wireless Wide Area Network WWAN Antenna module 14 Power button with fingerprint reader assembly Power button assembly 15 USH daughter board 16 I O daughter board 17 Heat sink 18 Heat sink shielding cover 19 System fan Removing and installing components 13...

Page 14: ...ard removal procedure Steps 1 Push the SD card to eject it from the slot 2 Remove the SD card from the system Installing the SD card Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image provides a visual representation of the SD card installation procedure 14 Removing and installing components ...

Page 15: ...re in After working on your computer SIM card tray Removing the SIM card tray Prerequisites Follow the procedure in before working inside your computer About this task The following image provides a visual representation of the SIM card tray removal procedure Removing and installing components 15 ...

Page 16: ...e system 4 Remove the Micro SIM from the SIM card tray 5 Slide the SIM card tray back into the slot on the system Installing the SIM card tray Prerequisites If you are replacing a component remove the necessary component before the installation procedure About this task The following image provides a visual representation of the SIM card tray installation procedure 16 Removing and installing compo...

Page 17: ...gn and place the Micro SIM card in the dedicated slot on the SIM card tray 5 Slide the SIM card tray back into the slot on the system Next steps Follow the procedure in After working on your computer Base cover Removing the base cover Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Enter service mode Removing and install...

Page 18: ...About this task 18 Removing and installing components ...

Page 19: ... cause damage to the base cover 3 Work your way around the sides of the base cover 4 Hold the left and right sides of the base cover and remove the base cover from the system NOTE If the thermal pad on the back of the base cover gets detached adhere it back onto the cover Installing the base cover Prerequisites If you are replacing a component remove the necessary component before the installation...

Page 20: ...s 1 Install the SIM card tray 2 Install the SD card 3 Exit service mode 4 Follow the procedure in After working on your computer Solid state drive Removing the solid state drive Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Enter service mode 5 Remove the base cover 20 Removing and installing components ...

Page 21: ... securing the solid state drive to the system board 4 Slide and remove the solid state drive from the solid state drive slot on the system board NOTE If the thermal pad located underneath the M 2 2230 SSD gets detached adhere it back to the system board Installing the solid state drive Prerequisites If you are replacing a component remove the existing component before performing the installation p...

Page 22: ...ign and place the solid state drive shielding cover press to fit it firmly to cover the solid state drive Next steps 1 Install the base cover 2 Install the SIM card tray 3 Install the SD card 4 Exit service mode 5 Follow the procedure in After working on your computer Wireless Wide Area Network WWAN Card Removing the WWAN card Prerequisites 1 Follow the procedure in before working inside your comp...

Page 23: ... system 3 Disconnect the antenna cables from the connectors on the WWAN card 4 Using a plastic scribe pry open the WWAN card shielding cover from the bottom edge of the WWAN card shielding cover 5 Using a plastic scribe pry open the WWAN card shield covering the WWAN card 6 Lift the WWAN card shielding cover out of the system 7 Slide and remove the WWAN card from the WWAN card slot NOTE If any of ...

Page 24: ... before performing the installation procedure About this task The following image indicates the location of the WWAN card and provides a visual representation of the installation procedure Steps 1 Align the notch on the WWAN card with the tab on the WWAN card slot 24 Removing and installing components ...

Page 25: ...card bracket on the system board and WWAN card and tighten the single captive screw Next steps 1 Install the base cover 2 Install the SIM card tray 3 Install the SD card 4 Exit service mode 5 Follow the procedure in After working on your computer System fan Removing the system fan Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card...

Page 26: ...out this task The following image indicates the location of the system fan and provides a visual representation of the installation procedure Steps 1 Align and place the system fan onto the palm rest assembly 2 Replace the two M1 6x2 5 screws that secure the system fan to the palm rest assembly 3 Connect the system fan cable to the connector on the system board 4 Adhere the single piece of tape se...

Page 27: ...moval procedure Steps 1 Peel the two pieces of tape securing the gray WWAN antenna cable from the bottom side of the CPU shielding cover 2 Peel the piece of conductive tape and the tape securing the system fan cable from the left side of the CPU shielding cover 3 Pry the CPU shielding cover from the pry point indicated on the top right corner of the CPU shielding cover CAUTION Do not remove the sh...

Page 28: ...wing image indicates the location of the heat sink and provides a visual representation of the installation procedure Steps 1 Align the screw holes on the heat sink with the screw holes on the system board 2 Tighten the three captive screws that secure the heat sink to the system board 3 Align and place the CPU shielding cover press to fit it firmly 4 Adhere the two pieces of tape securing the gra...

Page 29: ... Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Enter service mode 5 Remove the base cover About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure NOTE The display assembly removal procedure is the same for both laptop and 2 in 1 chassis Removing an...

Page 30: ...30 Removing and installing components ...

Page 31: ...ble from the system board in a direct upward motion to prevent damage to the connector s pins 2 Disconnect the camera cable from the connector on the system board and unroute the camera and display cables from the routing guides on the system board 3 Open the display assembly to a 180 degree angle and lay the display screen flat flip the entire computer over 4 Remove the six M2 5x3 screws that sec...

Page 32: ...ing component before performing the installation procedure NOTE The display assembly installation procedure is the same for both laptop and 2 in 1 chassis About this task The following image indicates the location of the display assembly and provides a visual representation of the installation procedure 32 Removing and installing components ...

Page 33: ...card tray 3 Install the SD card 4 Exit service mode 5 Follow the procedure in After working on your computer Battery Removing the battery Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Remove the base cover 5 Remove the WWAN card NOTE If battery was disconnected from system board for service there will be a delay during...

Page 34: ...oard and the routing guides along the top side of the battery 2 Peel off the piece of tape securing the WLAN antenna cables in place at the top side of the battery 3 Loosen the single captive screw securing the WLAN bracket to the system board 4 Lift the WLAN bracket off the system board 5 Disconnect the antenna cables connected to the WLAN module 6 Unroute the WLAN antenna cables and blue WWAN an...

Page 35: ... side of the battery 9 Unroute the speaker cables from the routing guides at the left and right side of the battery 10 Remove the single M1 6x3 screw and four M2x4 screws that secures the battery to the plam rest assembly 11 Lift the battery away from the computer Installing the battery Prerequisites If you are replacing a component remove the existing component before performing the installation ...

Page 36: ...oute the speaker cable in the routing guides along the top side of the battery and connect the speaker cable to the connector on the system board 7 Route the WLAN antenna cables and blue WWAN antenna cable in the metal clips on the system board and the routing guides along the sides of the battery 8 Connect the antenna cables to the WLAN module 9 Align and place the WLAN bracket on the system boar...

Page 37: ...mputer 2 Remove the SD card 3 Remove the SIM card tray 4 Remove the base cover 5 Remove the WWAN card 6 Remove the battery About this task The following images indicate the location of the speaker and provide a visual representation of the removal procedure Steps 1 Remove the single M1 6x1 8 screw securing the Proximity sensor bracket to the plam rest assembly 2 Disconnect the Proximity sensor cab...

Page 38: ...ect the speaker cable to the connector on the system board 4 Connect the Proximity sensor cable of the left speaker s WWAN antenna module to the RF board 5 Replace the single M1 6x1 8 screw securing the Proximity sensor bracket to the plam rest assembly Next steps 1 Install the battery 2 Install the WWAN card 3 Install the base cover 4 Install the SIM card tray 5 Install the SD card 6 Follow the p...

Page 39: ... the right speaker 2 Lift the right speaker off the system Installing the right 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 speaker and provides a visual representation of the installation procedure Removing and installing components 39 ...

Page 40: ...cedure in After working on your computer Wireless Local Area Network WLAN Antenna module Removing the WLAN antenna module Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Remove the base cover 5 Remove the WWAN card 6 Remove the battery About this task The following images indicate the location of the WLAN antenna module ...

Page 41: ...d unroute the Proximity sensor cable from the routing guides 4 Remove the two M1 6x3 screws that WLAN antenna module to the palm rest assembly and lift the WLAN antenna module off the system Installing the WLAN antenna module Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the lo...

Page 42: ...d route the Proximity sensor cable in the routing guides 4 Align and place the Proximity sensor bracket on the RF board 5 Replace the single M1 6x1 8 screw securing the Proximity sensor bracket to the palm rest assembly Next steps 1 Install the battery 2 Install the WWAN card 3 Install the base cover 4 Install the SIM card tray 5 Install the SD card 6 Follow the procedure in After working on your ...

Page 43: ...About this task The following image indicates the location of the I O board and provides a visual representation of the removal procedure Steps 1 Disconnect the I O daughter FPC cable from the connector on the system board 2 Remove the single M2x4 screw securing the I O daughter board bracket to the palm rest assembly 3 Lift the I O daughter board bracket off the system 4 Lift the I O daughter boa...

Page 44: ...on of the installation procedure Steps 1 Connect the I O daughter board FPC cable to the I O daughter board 2 Place the I O daughter board with the FPC cable in the slot on the system 3 Align and place the I O board bracket on the I O daughter board 4 Replace the single M2x4 screw securing the I O daughter board bracket to the palm rest assembly 5 Connect the I O daughter FPC cable to the connecto...

Page 45: ...move the display assembly 8 Remove the I O daughter board About this task The following images indicate the location of the power button and provide a visual representation of the removal procedure Steps 1 Gently disconnect the power button with fingerprint reader FPC cable from the connector on the USH daughter board 2 Remove the three M1 6x2 5 screws securing the power button with fingerprint re...

Page 46: ...ith fingerprint reader bracket on the power button with fingerprint reader assembly 3 Replace the three M1 6x2 5 screws that secures the power button with fingerprint reader bracket to the palm rest assembly 4 Gently connect the power button with fingerprint reader FPC cable to the connector on the USH daughter board Next steps 1 Install the I O daughter board 2 Install the display assembly 3 Inst...

Page 47: ... antenna module connector 5 WWAN card connector 6 eDP display cable connector 7 Camera IR cable connector 8 USB type C connectors 9 Left speaker cable connector 10 Solid state drive slot 11 Clickpad cable connector 12 Battery cable connector 13 LED board connector 14 Right speaker cable connector 15 System fan cable connector The following images indicate the location of the system board assembly ...

Page 48: ...em board and then remove the system board Steps 1 Disconnect the I O daughter board FPC cable from the connector on the system board 2 Disconnect the USH daughter board FPC cable from the connector on the system board For the systems shipped with USH daughter board 3 Disconnect the power button with fingerprint reader FPC cable from the connector on the system board For the systems shipped with po...

Page 49: ...d CAUTION Disconnect the Darwin cables from the system board in a direct upward motion to prevent damage to the connector s pins 13 Unroute the white gray WWAN main antenna cable and black gray WWAN antenna cable from the metal clips on the system board 14 Remove the three M2x4 screws that secures the USB Type C bracket to the system board 15 Remove the four M1 6x2 5 screws that secure the system ...

Page 50: ...he metal clips on the system board 6 Align and place the WWAN Darwin cable bracket on the system board 7 Tighten the single captive screw that secures the WWAN Darwin cable bracket to the system board 8 Connect the system fan cable to the connector on the system board 9 Connect the LED board FPC cable to the connector on the system board 10 Connect the clickpad FPC cable to the connector on the sy...

Page 51: ... sink 3 Install the WWAN card 4 Install the solid state drive 5 Install the base cover 6 Install the SIM card tray 7 Install the SD card 8 Follow the procedure in After working on your computer USH daughter board Removing the USH daughter board Prerequisites NOTE For system shipped with USH daughter board only 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Rem...

Page 52: ... Lift the USH daughter board with the FPC cable off the system 5 Disconnect the USH daughter board FPC cable from USH daughter board Installing the USH daughter board 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 USH daughter board and provides a visual repr...

Page 53: ... board Next steps 1 Install the system board 2 Install the I O daughter board 3 Install the battery 4 Install the display assembly 5 Install the heat sink 6 Install the WWAN card 7 Install the base cover 8 Install the SIM card tray 9 Install the SD card 10 Follow the procedure in After working on your computer Wireless Wide Area Network WWAN Antenna module Removing the WWAN main antenna module Pre...

Page 54: ...dure Steps 1 Remove the four M1 6x3 screws securing the WWAN main antenna module to the palm rest assembly 2 Lift the WWAN main antenna module off the system Installing the WWAN main antenna module 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 WWAN main ante...

Page 55: ...ink 6 Install the WWAN card 7 Install the base cover 8 Install the SIM card tray 9 Install the SD card 10 Follow the procedure in After working on your computer Palm rest assembly Removing the palm rest assembly Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the SD card 3 Remove the SIM card tray 4 Remove the base cover 5 Remove the solid state drive 6 Remove ...

Page 56: ...N main antenna module About this task The following images indicate the location of the palm rest assembly and provide a visual representation of the removal procedure Installing the palm rest assembly Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following images indicate the location of the palm rest ...

Page 57: ...erprint reader 5 Install the I O daughter board 6 Install the WLAN antenna module 7 Install the right speaker 8 Install the left speaker 9 Install the battery 10 Install the display assembly 11 Install the heat sink 12 Install the WWAN card 13 Install the solid state drive 14 Install the base cover 15 Install the SIM card tray 16 Install the SD card 17 Follow the procedure in After working on your...

Page 58: ... for browser specific instructions 8 Click View Drivers for My System 9 Click Download and Install to download and install all driver updates detected for your computer 10 Select a location to save the files 11 If prompted approve requests from User Account Control to make changes on the system 12 The application installs all drivers and updates identified NOTE Not all files can be installed autom...

Page 59: ...Sequence System setup options Updating the BIOS in Windows System and setup password ExpressSign in BIOS overview The BIOS manages data flow between the computer s operating system and attached devices such as hard disk video adapter keyboard mouse and printer Entering BIOS setup program About this task Turn on or restart your computer and press F2 immediately Boot menu Press F12 when the Dell log...

Page 60: ...e until you view the main screen Pressing Esc in the main screen displays a message that prompts you to save any unsaved changes and restarts the system Boot Sequence Boot sequence enables you to bypass the System Setup defined boot device order and boot directly to a specific device for example optical drive or hard drive During the Power on Self Test POST when the Dell logo appears you can Acces...

Page 61: ... Battery level This gives the percentage of battery backup remaining for the computer Battery state This helps identify if the battery is in charging or active use state Health This helps identify the health of the battery It would show one of the following states based on the battery life remaining Excellent Good Fair Poor AC Adapter This helps identify if the charger is plugged in and mentions t...

Page 62: ... gives the capacity of the video memory available for use on the computer Wi Fi Device This field mentions the type of wireless device available for use on the computer Native Resolution This field mentions the native video resolution supported on the computer Video BIOS Version The version of the BIOS installed on the computer Audio Controller This field mentions the type of audio controller used...

Page 63: ...n making changes to Secure Boot Keys Expert Key Management Enable Custom Mode This section contains a toggle switch that allows the user to enable or disable Custom Mode This mode allows the PK KEK db and dbx security key databases to be manipulated OFF by default Custom Mode Key Management This section helps the user to select the Key Database to allow modification The options available are as be...

Page 64: ...CIe behind TBT pre boot modules This section contains a toggle switch to enable or disable PCIe devices that are connected through a Thunderbolt adapter to execute the PCIe devices UEFI option ROM s during pre boot Disabled by default Disable USB4 PCIE Tunneling This section contains a toggle switch to enable or disable USB4 PCIE Tunneling Disabled by default Video Power only on Type C Ports This ...

Page 65: ...tion provides information about the connected and active drives on the computer The following options are available M 2 PCIe SSD 0 Type Device Enable MediaCard This section allows the user to switch all media cards On Off or enable disable the media card in read state only The options are as follows Secure Digital SD Card Enabled by default Secure Digital SD Card Read Only Mode Disabled by default...

Page 66: ... enable or disable HTTP s Boot capabilities ON by default HTTP s Boot Modes Auto Mode HTTP s Boot automatically extracts Boot URL from DHCP Dynamic Host Configuration Protocol Selected by default Manual Mode HTTP s Boot reads Boot URL provided by the user This section also contains an Upload and Delete option for provisioning of the certificates required to connect to HTTPs Boot server Power This ...

Page 67: ...erformance noise and temperature The options available are as below Optimized Standard setting for cooling fan and processor heat management selected by default Cool Processor and cooling fan speed are adjusted for a cooler system surface temperature Quiet Processor and cooling fan speed are adjusted to reduce fan noise Ultra Performance Processor and cooling fan speed are increased for more perfo...

Page 68: ...s the user to control whether TPM Storage Hierarchy is available to the operating system ON by default SHA 256 This section contains a toggle switch that when enabled allows the BIOS and the TPM to use the SHA 256 hash algorithm to extend measurements into the TPM PCRs during BIOS boot ON by default Clear This section contains a toggle switch which clears the TPM owner information and returns the ...

Page 69: ...ailable are as follows Enable Absolute Enables Absolute Persistence and load the firmware Persistence Module Selected by default Disable Absolute Disables Absolute Persistence The firmware Persistence Module is not installed Permanently Disable Absolute Permanently disables Absolute Persistence module interface from further use UEFI Boot Path Security UEFI Boot Path Security This section lets the ...

Page 70: ...rnal hard drive passwords when powered on from Off state Options available are as below Disabled selected by default Reboot Bypass Password Changes Enable Non Admin Password Changes This section contains a toggle switch which when on user can change system and hard drive password without the need for admin password OFF by default Admin Setup Lockout Enable Admin Setup Lockout This section contains...

Page 71: ... revisions SupportAssist OS Recovery SupportAssist OS Recovery This field contains a toggle switch which allows the user to enable or disable the boot flow for SupportAssist OS Recovery tool in the events of certain system errors ON by default BIOSConnect BIOSConnect This field contains a toggle switch which allows the user to enable or disable BIOSConnect setup to attempt cloud Service OS recover...

Page 72: ...and boot to PXE Auto On Time Auto On Time This field allows the user to set defined days time when the sytem can automatically power on The options here are as follows Disabled selected by default Everyday Weekdays Select Days Intel AMT Capability Enable Intel AMT capability This section allows the user to control AMT options on the system Disabled Enabled Restrict MEBx Access Selected by default ...

Page 73: ...onnected to the computer The options here are as follows 5 seconds 10 seconds selected by default 15 seconds 30 seconds 1 minute 5 minutes 15 minutes Never Keyboard Backlight Timeout on Battery Keyboard Backlight Timeout on Battery This field allows the user to define the timeout value for the backlight when the battery is powering to the computer The options here are as follows 5 seconds 10 secon...

Page 74: ...ptions here are as follows Minimal reduces boot time by skipping certain hardware and configuration initialization during boot selected by default Thorough Performs complete hardware and configuration initialization during boot Auto Allows the BIOS to decide configuration initialization performed during boot Extend BIOS POST Time Extend BIOS POST Time This field allows the user to configure the BI...

Page 75: ...tion technology Intel VT for Direct I O Performance This section provides Performance settings Table 18 Performance continued Options Description Multi Core Support Active Cores This field allows the user to configure the number of active cores on the computer The options are as follows All Cores selected by default 1 2 3 Intel SpeedStep Enable Intel SpeedStep Technology This field contains a togg...

Page 76: ... Thermal Event Log This field contains a toggle switch to Keep or Clear Thermal Event logs It also lists all saved events Date Time Message Keep selected by default Power Event Log Clear Power Event Log This field contains a toggle switch to Keep or Clear Power Event logs It also lists all saved events Date Time Message Keep selected by default Updating the BIOS in Windows Prerequisites It is reco...

Page 77: ...the recovery key is not known this can result in data loss or an unnecessary operating system reinstall For more information about this subject see Knowledge Article Updating the BIOS on Dell Systems With BitLocker Enabled Updating your system BIOS using a USB flash drive About this task If the system cannot load into Windows but there is still a need to update the BIOS download the BIOS file usin...

Page 78: ...your computer CAUTION Anyone can access the data stored on your computer if it is not locked and left unattended NOTE System and setup password feature is disabled Assigning a system setup password Prerequisites You can assign a new System or Admin Password only when the status is Not Set About this task To enter the system setup press F2 immediately after a power on or reboot Steps 1 In the Syste...

Page 79: ...Tab 4 Select Setup Password alter or delete the existing setup password and press Enter or Tab NOTE If you change the System and or Setup password re enter the new password when prompted If you delete the System and Setup password confirm the deletion when prompted 5 Press Esc and a message prompts you to save the changes 6 Press Y to save the changes and exit from System Setup The computer restar...

Page 80: ... the proximity sensor If you select Yes the proximity sensor is enabled If you select No the proximity sensor is not enabled if you select the Do not show again checkbox a message that the user must be within the sensor FoV for the features to function properly is not displayed until the option is again enabled manually NOTE If multiple monitors are connected the Dell ExpressSign in window is disp...

Page 81: ... and the laptop display should be 70cm for optimum performance of the proximity sensor Table 24 FoV states Field name Description Range angle The proximity sensor should function satisfactorily in detecting user presence absence within a27 conical range as defined by the center of the target Range distance The proximity sensor should function satisfactorily in detecting user presence absence 100cm...

Page 82: ...Table 25 Supported hinge angles System with status Supported hinge angle Illustration Clamshell 60 to 150 Stand 210 to 300 Tablet Not supported Tent Not supported 82 System setup ...

Page 83: ... error messages that inform you of problems encountered during testing NOTE Some tests for specific devices require user interaction Always ensure that you are present at the computer terminal when the diagnostic tests are performed For more information see Resolve Hardware Issues With Built in and Online Diagnostics SupportAssist ePSA ePSA or PSA Error Codes Running the SupportAssist Pre Boot Sys...

Page 84: ... system board 1 6 Generic catch all for ungraceful EC code flow errors Disconnect all power source AC battery coin cell and drain flea power by pressing holding down power button 2 1 CPU failure Run the Intel CPU diagnostics tools If problem persists replace the system board 2 2 System Board failure included BIOS corruption or ROM error Flash latest BIOS version If problem persists replace the sys...

Page 85: ...ERROR The hard drive cannot read the data DECREASING AVAILABLE MEMORY One or more memory modules may be faulty or improperly seated Reinstall the memory modules or if necessary replace them DISK C FAILED INITIALIZATION The hard drive failed initialization Run the hard drive tests in Dell Diagnostics DRIVE NOT READY The operation requires a hard drive in the bay before it can continue Install a har...

Page 86: ...tem is trying to boot to non bootable media such as an optical drive Insert bootable media INVALID CONFIGURATION INFORMATION PLEASE RUN SYSTEM SETUP PROGRAM The system configuration information does not match the hardware configuration The message is most likely to occur after a memory module is installed Correct the appropriate options in the system setup program KEYBOARD CLOCK LINE FAILURE For e...

Page 87: ...cking utility to check the file structure on the hard drive See Windows Help and Support for instructions click Start Help and Support If a large number of sectors are defective back up the data if possible and then format the hard drive SEEK ERROR The operating system cannot find a specific track on the hard drive SHUTDOWN FAILURE A chip on the system board may be malfunctioning Run the System Se...

Page 88: ...connected and that the drive is installed properly and partitioned as a boot device Enter system setup and ensure that the boot sequence information is correct No timer tick interrupt A chip on the system board might be malfunctioning or motherboard failure NOTICE Hard Drive SELF MONITORING SYSTEM has reported that a parameter has exceeded its normal operating range Dell recommends that you back u...

Page 89: ...ications technical help blogs drivers software updates and so on www dell com support Dell knowledge base articles for a variety of computer concerns 1 Go to https www dell com support home app knowledgebase 2 Type the subject or keyword in the Search box 3 Click Search to retrieve the related articles Contacting Dell To contact Dell for sales technical support or customer service issues see www d...

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Dell Latitude 9420, Service Manual

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