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Dell Inspiron 7420, Service Manual

The Dell Inspiron 7420 is an exceptional laptop designed to cater to your computing needs. To ensure you make the most out of your device, a comprehensive Service Manual is available for download, completely free of charge, from manualshive.com. This manual provides step-by-step instructions and valuable insights for optimal usage and maintenance.

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2. Battery
3. I/O board
4. Heatsink
5. Solid-state drive cover
6. System board
7. Speakers
8. Audio board
9. Palmrest assembly
10. Display assembly
11. Keyboard assembly
12. Power button with fingerprint reader
13. SmartCard reader
14. Palmrest antenna
15. WWAN card shield
16. Solid-state drive
17. Solid-state drive shield
18. WWAN card

NOTE:

 Dell provides a list of components and their part numbers for the original system configuration purchased. These

parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for
purchase options.

micro-SD card

Removing the micro-SD card

About this task

The following images indicate the location of the micro-SD card reader slot and provide a visual representation of the removal
procedure.

Steps

1. Push the micro-SD card to eject it from the slot.
2. Remove the micro-SD card from the computer.

Removing and installing components

15

Summary of Contents for Inspiron 7420

Page 1: ...Latitude 7420 Service Manual Regulatory Model P135G P136G Regulatory Type P135G001 P136G001 January 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: ...18 Installing the base cover 20 Solid state drive 22 Removing the solid state drive 22 Installing the solid state drive 23 WWAN card 24 Removing the WWAN card 24 Installing the WWAN card 26 Battery 27 Lithium ion battery precautions 27 Removing the 3 cell battery 27 Installing the 3 cell battery 28 Removing the 4 cell battery 30 Installing the 4 cell battery 31 Heatsink assembly 32 Removing the he...

Page 4: ...apter 3 Software 62 Downloading Windows drivers 62 Chapter 4 System setup 63 BIOS overview 63 Entering BIOS setup program 63 Boot menu 63 Navigation keys 64 Boot Sequence 64 System setup options 64 Updating the BIOS in Windows 74 Updating BIOS on systems with BitLocker enabled 75 Updating your system BIOS using a USB flash drive 75 System and setup password 76 Assigning a system setup password 76 ...

Page 5: ...he BIOS 81 WiFi power cycle 81 BIOS recovery 82 BIOS recovery using hard drive 82 BIOS recovery using USB drive 83 M BIST 83 LCD Built in Self Test BIST 84 Chapter 6 Getting help 85 Contacting Dell 85 Contents 5 ...

Page 6: ... covered by your warranty Read and follow the safety instructions that came with the product CAUTION To avoid electrostatic discharge ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface at the same time as touching a connector on the back of the computer CAUTION Handle components and cards with care Do not touch the components or contacts on a ca...

Page 7: ... the screen press any key to proceed NOTE The Service Mode procedure will automatically skip this step if the Owner Tag of the system is not set up in advance by the manufacturer 4 Ensure that the AC adapter has been disconnected and press any key to proceed Working on your computer 7 ...

Page 8: ...tem will automatically return to normal functioning mode Before working inside your computer About this task NOTE The images in this document may differ from your computer depending on the configuration you ordered Steps 1 Save and close all open files and exit all open applications 2 Shut down your computer Click Start Power Shut down NOTE If you are using a different operating system see the doc...

Page 9: ...n metal surface The wrist strap should be secure and in full contact with your skin and ensure that you remove all jewelry such as watches bracelets or rings prior to bonding yourself and the equipment Electrostatic discharge ESD protection ESD is a major concern when you handle electronic components especially sensitive components such as expansion cards processors memory DIMMs and system boards ...

Page 10: ...st 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 lit and an alarm sound...

Page 11: ...t antenna module Display assembly Audio board Speakers SmartCard reader System board I O board Power button with fingerprint reader Keyboard Palmrest assembly Recommended tools The procedures in this document require the following tools Phillips 0 screwdriver Plastic scribe Recommended for field technicians Screw List The following table shows the screw list and the image of the screws Table 1 Scr...

Page 12: ...tery M2 5x4 Captive screws 1 4 4 cell Battery M2x4 Captive screws 1 4 Heatsink assembly M2x2 5 6 Palmrest antenna M2x2 M2x2 5 1 2 Display assembly M2x2 M2 5x5 3 4 Audio board M2x2 5 1 SmartCard reader M2x2 5 4 System board M2x2 M2x2 5 M2x3 M2x4 3 4 2 2 I O board M2x4 2 Power button with fingerprint reader M1 6x1 7 2 12 Removing and installing components ...

Page 13: ...Table 1 Screw list continued Component Screw type Quantity Image Keyboard M1 6x1 7 M2x2 26 2 Removing and installing components 13 ...

Page 14: ...Major components of your system 1 Base cover 14 Removing and installing components ...

Page 15: ...ponents and their part numbers for the original system configuration purchased These parts are available according to warranty coverages purchased by the customer Contact your Dell sales representative for purchase options micro SD card Removing the micro SD card About this task The following images indicate the location of the micro SD card reader slot and provide a visual representation of the r...

Page 16: ...ro SD card reader slot and provides a visual representation of the installation procedure Steps Insert the micro SD card into its slot until it clicks into place 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 16 Removing and...

Page 17: ...m 4 Remove the SIM card from the SIM card tray 5 Slide and push the SIM card tray back into the slot 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 Removing and installing components 17 ...

Page 18: ... slot in the system 6 and push it to lock in place 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 microSD card 3 Enter the service mode 18 Removing and installing components ...

Page 19: ...About this task Removing and installing components 19 ...

Page 20: ...over 3 Pry open the left and right sides of the base cover 4 Pry open the bottom side of the base cover 5 Hold the left and right sides of the base cover and remove it from the computer 6 Disconnect the battery cable Installing the base cover Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image...

Page 21: ...Removing and installing components 21 ...

Page 22: ...powering up your computer Follow the procedure in after working inside your computer Solid state drive Removing the solid state drive Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the microSD card 3 Enter the service mode 4 Remove the base cover About this task The following images indicate the location of the solid state drive and provide a visual representa...

Page 23: ...to the plate If the thermal pad gets separated from the plate or is adhered to the SSD stick back the thermal pad to the SSD plate before reinstalling the plate to the SSD Installing the solid state drive 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 solid s...

Page 24: ...e base cover 2 Install the microSD card 3 NOTE Plug in AC before powering up your computer Follow the procedure in after working inside your computer WWAN card Removing the WWAN card Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the microSD card 3 Enter the service mode 4 Remove the base cover About this task The following images indicate the location of the ...

Page 25: ...he WWAN card shield from the recess on the top left corner 2 Loosen the single M2x2 5 screw and remove the WWAN card bracket 3 Disconnect the antenna cables from the connectors on the WWAN card 4 Slide and remove the WWAN card out from the M 2 slot on the system board Removing and installing components 25 ...

Page 26: ...eps 1 Align the notch on the WWAN card with the tab on the WWAN card slot and slide the WWAN into the M 2 slot on the system board 2 Connect the antenna cables to the connectors on the WWAN card 3 Align and place the WWAN card bracket and tighten the single M2x2 5 screw securing it to the system board 4 Replace the WWAN card shield over the WWAN card NOTE Insert the edges of the WWAN card shield i...

Page 27: ... not bend the battery Do not use tools of any kind to pry on or against the battery Ensure any screws during the servicing of this product are not lost or misplaced to prevent accidental puncture or damage to the battery and other system components If the battery gets stuck inside your computer as a result of swelling do not try to release it as puncturing bending or crushing a lithium ion battery...

Page 28: ...r board and release the speaker cable from the routing guides over the upper right side of the battery 3 Remove the single M2 5x4 screw and the four captive screws that secure the battery to the computer 4 Lift and remove the battery from the computer Installing the 3 cell battery Prerequisites If you are replacing a component remove the existing component before performing the installation proced...

Page 29: ...and place the battery into the computer 2 Install the single M2 5x4 screw and four captive screws to secure the battery in place 3 Connect the speaker cable to the speaker board and reroute the speaker cable into its routing channel over the upper right side of the battery 4 Connect the battery cable to the system board Next steps 1 Install the base cover 2 Install the microSD card 3 Follow the pr...

Page 30: ... About this task The following images indicate the location of the battery and provide a visual representation of the removal procedure Steps 1 Disconnect the battery cable from the system board 2 Disconnect the speaker cable from the speaker board and unroute the speaker cable from its routing channel over the upper right side of the battery 3 Remove the single M2x4 screw and the four captive scr...

Page 31: ...e following image indicates the location of the battery and provides a visual representation of the installation procedure NOTE If the battery is disconnected from system board there is delay during computer boot as the computer undergoes RTC reset Steps 1 Align and place the battery into the computer 2 Install the single M2x4 screw and the four captive screws to secure the battery in place Removi...

Page 32: ...equisites 1 Follow the procedure in before working inside your computer 2 Remove the microSD card 3 Enter the service mode 4 Remove the base cover About this task The following images indicate the location of the heatsink assembly and provide a visual representation of the removal procedure Steps 1 Disconnect the fan cable from the system board 2 Remove the two M2x2 5 screws on the fan case and th...

Page 33: ...ion procedure Steps 1 Align and place the heatsink assembly into its slot in the computer 2 Replace the two M2x2 5 screws on the fan casing and four M2x2 5 screws in sequential order 1 2 3 4 to secure the heatsink assembly to the computer 3 Connect the fan cable to the system board Next steps 1 Install the base cover 2 Install the microSD card 3 NOTE Plug in AC before powering up your computer Fol...

Page 34: ...l procedure Steps 1 Remove the M2x2 screw that secures the palmrest bracket to the system board 2 Disconnect and unroute the antenna cables connected to the WLAN module on the system board 3 Remove the two M2x2 5 screws that secure the palmrest antenna module to the system 4 Lift the palmrest antenna module away from the system Installing the palmrest antenna module Prerequisites If you are replac...

Page 35: ...ng channel and connect them to the WLAN module on the system board 3 Replace the M2x2 screw that secures the WLAN bracket to the system board Next steps 1 Install the base cover 2 Install the microSD card 3 Follow the procedure in after working inside your computer Display assembly Removing the display assembly Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove th...

Page 36: ...About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure 36 Removing and installing components ...

Page 37: ...e 4 Disconnect the WWAN antenna cable and release the cable from the rubber guides on the system board 5 Remove the two M2x2 securing the display cable bracket to the system board 6 Lift to remove the display cable bracket from the computer 7 Disconnect the display camera touch screen sensor board cables from the system board and release them from cable guiding tabs Removing and installing compone...

Page 38: ... If any components in the display assembly are malfunctioning and must be replaced replace the entire display assembly Figure 1 Display assembly with antennae cables Installing the display assembly 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 display assemb...

Page 39: ...Removing and installing components 39 ...

Page 40: ...ntenna cables along the rubber guides on the system board 7 Replace the single M2x2 screw securing the WLAN card bracket to the system board 8 Align and place the display cable bracket on the connector on the system board 9 Install the two M2x2 screws securing the display cable bracket to the system board Next steps 1 Install the WWAN card 2 Install the base cover 3 Install the microSD card 4 NOTE...

Page 41: ... 2 Remove the M2x2 5 screw that secures the audio board to the computer 3 Lift and remove the audio board from the computer Installing the audio 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 audio board and provides a visual representation of the insta...

Page 42: ...oard FFC to the system board Next steps 1 Install the battery 2 Install the base cover 3 Follow the procedure in after working inside your computer Speakers Removing the speakers Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the microSD card 3 Remove the base cover 4 Remove the battery 42 Removing and installing components ...

Page 43: ...t assembly 2 Lift and remove the speakers from the computer chassis Installing the 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 43 ...

Page 44: ...nels along the bottom side of the palmrest assembly Route the speaker cable underneath the LED board FFC Next steps 1 Install the battery 2 Install the base cover 3 Install the microSD card 4 Follow the procedure in after working inside your computer SmartCard reader Removing the smart card reader Prerequisites 1 Follow the procedure in before working inside your computer 44 Removing and installin...

Page 45: ...he base cover 4 Remove the battery 5 Remove the speaker About this task The following images indicate the location of the smart card reader and provide a visual representation of the removal procedure Removing and installing components 45 ...

Page 46: ... slide the smart card reader out from its slot in the chassis Installing the smart card reader 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 smart card reader and provides a visual representation of the installation procedure 46 Removing and installing compo...

Page 47: ...m board Next steps 1 Install the speaker 2 Install the battery 3 Install the base cover 4 Install the microSD card 5 Follow the procedure in after working inside your computer System board Removing the system board Prerequisites 1 Follow the procedure in before working inside your computer 2 Enter the service mode 3 Remove the microSD card 4 Remove the SIM card 5 Remove the base cover 6 Remove the...

Page 48: ... dummy SIM card tray must removed from the system before removing the system board To remove the dummy SIM card tray push the release latch inwards and then slide dummy card tray out of the computer NOTE For non WWAN configurations remove the WWAN card shield and WWAN card bracket before removing the system board About this task The following images indicate the location of the system board and pr...

Page 49: ...he display camera touch screen sensor board cables from the system board and unroute them from guiding tabs 10 Disconnect the speakers board FPC audio board FFC touchpad FFC USH board FFC and LED board FFC from the system board 11 Remove the single M2x2 5 screw For computer configuration with fingerprint reader on power button or four M2x2 5 screws For computer configuration without fingerprint re...

Page 50: ...50 Removing and installing components ...

Page 51: ...2 screws 5 Route the WWAN antenna cables along the rubber guides on the system board and connect it to the WWAN card 6 Connect the WLAN antenna cables to the WLAN module on the system board 7 Replace the WLAN antenna bracket and secure it to the system board using the single M2x2 screw 8 Connect the fingerprint reader FPC to the system board 9 Replace the finger print reader bracket and secure to ...

Page 52: ... heatsink assembly 10 Remove the system board About this task The following images indicate the location of the I O board and provide a visual representation of the removal procedure Steps 1 Remove the two M2x4 screws that secure the I O board to the computer 2 Lift and remove the I O board from the computer Installing the I O board Prerequisites If you are replacing a component remove the existin...

Page 53: ...k assembly 3 Install the battery 4 Install the WWAN card 5 Install the solid state drive 6 Install the base cover 7 Install the SIM card 8 Install the microSD card 9 NOTE Plug in AC before powering up your computer Follow the procedure in after working inside your computer Power button with fingerprint reader Removing the power button with fingerprint reader Prerequisites 1 Follow the procedure in...

Page 54: ...emove the two M1 6x1 7 screws securing the power button with fingerprint reader to the computer 2 Lift and remove the power button with fingerprint reader from the computer Installing the power button with fingerprint reader Prerequisites If you are replacing a component remove the existing component before performing the installation procedure About this task The following image indicates the loc...

Page 55: ...N card 5 Install the solid state drive 6 Install the base cover 7 Install the SIM card 8 Install the microSD card 9 NOTE Plug in AC before powering up your computer Follow the procedure in after working inside your computer Keyboard Removing the keyboard Prerequisites 1 Follow the procedure in before working inside your computer 2 Remove the microSD card 3 Remove the base cover 4 Remove the solid ...

Page 56: ... the audio board 9 Remove the system board 10 Remove the I O board About this task The following images indicate the location of the keyboard and provide a visual representation of the removal procedure 56 Removing and installing components ...

Page 57: ...rd assembly to remove it from the computer 5 Remove the two M2x2 screws securing the keyboard to the keyboard support plate 6 Separate the keyboard from the keyboard support plate Installing the keyboard 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 keyboard...

Page 58: ...58 Removing and installing components ...

Page 59: ...C to the back of the keyboard Next steps 1 Install the I O board 2 Install the system board 3 Install the audio board 4 Install the heatsink assembly 5 Install the battery 6 Install the WWAN card 7 Install the solid state drive 8 Install the base cover 9 Install the microSD card 10 Follow the procedure in after working inside your computer Palmrest assembly Removing the palmrest assembly Prerequis...

Page 60: ... with the palmrest assembly Installing the palmrest assembly 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 palmrest assembly and provides a visual representation of the installation procedure Steps 1 Place the palmrest assembly on a flat surface 2 Transfer o...

Page 61: ...eaker 8 Install the display assembly 9 Install the heatsink assembly 10 Install the battery 11 Install the WWAN card 12 Install the solid state drive 13 Install the base cover 14 Install the SIM card 15 Install the microSD card 16 Follow the procedure in after working inside your computer Removing and installing components 61 ...

Page 62: ...lick Submit NOTE If you do not have the Service Tag use the auto detect feature or manually browse for your notebook model 4 Click Drivers and Downloads 5 Select the operating system installed on your notebook 6 Scroll down the page and select the driver to install 7 Click Download File to download the driver for your notebook 8 After the download is complete navigate to the folder where you saved...

Page 63: ...S in Windows System and setup password Clearing BIOS System Setup and System passwords 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 logo appears to ...

Page 64: ...g up the one time boot menu by pressing F12 key The one time boot menu displays the devices that you can boot from including the diagnostic option The boot menu options are Removable Drive if available STXXXX Drive NOTE XXXX denotes the SATA drive number Optical Drive if available SATA Hard Drive if available Diagnostics NOTE Choosing Diagnostics displays the SupportAssist screen The boot sequence...

Page 65: ...her the processor is Hyper Threading HT capable 64 Bit Technology Displays whether 64 bit technology is used Memory Information Memory Installed Displays the total system memory installed Memory Available Displays the total system memory available Memory Speed Displays the memory speed Memory Channel Mode Displays single or dual channel mode Memory Technology Displays the technology that is used f...

Page 66: ...able Audio Enable or disable the integrated audio controller By default all the options are enabled USB Thunderbolt Configuration Enable or disable booting from USB mass storage devices that are connected to external USB ports By default the Enable External USB Ports option is enabled Enable or disable booting from USB mass storage devices such as external hard drive optical drive and USB drive By...

Page 67: ...e or disable Fingerprint Reader device By default the Enable Fingerprint Reader Device option is enabled Unobtrusive Mode Enable Unobtrusive Mode Enable or disable all the system light and sound By default the Enable Unobtrusive Mode option is disabled Table 5 System setup options Storage menu Storage SATA NVMe Operation SATA NVMe Operation Set the operating mode of the integrated storage device c...

Page 68: ...luetooth Enable or disable the internal Bluetooth device By default the option enabled Contactless smartcard NFC Enable or disable the internal Contactless smartcard NFC device By default the option enabled Enable UEFI Network Stack Enable or disable UEFI Network Stack and controls the on board LAN Controller By default the Enable UEFI Network Stack option is enabled Wireless Radio Control Control...

Page 69: ...ecting 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 Intel Speed Shift Technology Enable or disable the Intel speed shift techn...

Page 70: ...Enable or disable or permanently disable the BIOS module interface of the optional Absolute Persistence Module service from Absolute software By default the option is enabled UEFI Boot Path Security Controls whether the system will prompt the user to enter the admin password if set when booting to a UEFI boot device from the F12 boot menu By default the Always Except Internal HDD option is enabled...

Page 71: ... Firmware Updates Enable or disable BIOS updates through UEFI capsule update packages By default the option is enabled BIOS Recovery from Hard Drive Enables the user to recover from certain corrupted BIOS conditions from a recovery file on the user primary hard drive or an external USB key By default the option is enabled BIOS Downgrade Allow BIOS Downgrade Enable or disable the flashing of the sy...

Page 72: ...ey to access MEBx By default OFF option is disabled USB Provision Enable USB Provision Intel AMT can be provisioned using the local provisioning file using a USB storage device By default OFF option is disabled Table 13 System setup options Keyboard menu Keyboard Fn Lock Options By default the Fn lock option is enabled Keyboard Illumination Enables to change the keyboard illumination settings By d...

Page 73: ... Virtualization Technology Enable Intel Virtualization Technology VT Specify whether a Virtual Machine Monitor VMM can use the additional hardware capabilities that are provided by Intel Virtualization Technology By default the option is enabled VT for Direct I O Specify whether a Virtual Machine Monitor VMM can use the additional hardware capabilities that are provided by Intel Virtualization Tec...

Page 74: ...BIOS Event Log Clear Bios Event Log Display BIOS events By default the Keep option is enabled Thermal Event Log Clear Thermal Event Log Display Thermal events By default the Keep option is enabled Power Event Log Clear Power Event Log Display power events By default the Keep option is enabled License Information Displays the license information of the system Updating the BIOS in Windows Prerequisi...

Page 75: ...ed to enter the recovery key to progress and the system will ask for this on each reboot If the recovery key is not known this can result in data loss or an unnecessary operating system re install For more information on this subject see Knowledge Article https www dell com support article sln153694 Updating your system BIOS using a USB flash drive About this task If the computer cannot load into ...

Page 76: ...ta 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 in Not Set About this task To enter the system setup press F2 immediately after a power on or reboot Steps 1 In the System BIOS or System Setup screen select Securi...

Page 77: ...is displayed 2 In the System Security screen verify that Password Status is Unlocked 3 Select System Password alter or delete the existing system password and press Enter or 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 pass...

Page 78: ...perating system due to software or hardware failures For more information about the Dell SupportAssist OS Recovery see Dell SupportAssist OS Recovery User s Guide at www dell com support Backup media and recovery options It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows Dell proposes multiple options for recovering Windows operating system on...

Page 79: ... the diagnostic test 7 Select the device from the left pane and click Run Tests 8 If there are any issues error codes are displayed Note the error code and validation number and contact Dell Diagnostic LED behavior Table 19 Diagnostic LED behavior Blinking pattern Problem description Suggested resolution Amber White 1 1 TPM detection failure Replace the system board 1 2 Unrecoverable SPI Flash Fai...

Page 80: ...d 3 4 BIOS Recovery image found but invalid Flash latest BIOS version If problem persists replace the system board 3 5 Power rail failure Replace the system board 3 6 Flash corruption detected by SBIOS Replace the system board 3 7 Timeout waiting on ME to reply to HECI message Replace the system board NOTE Blinking 3 3 3 LEDs on Lock LED Caps Lock or Nums Lock Power button LED without Fingerprint ...

Page 81: ...ort 3 Click Product support enter the Service Tag of your computer and then click Submit NOTE If you do not have the Service Tag use the auto detect feature or manually browse for your computer model 4 Click Drivers downloads Find it myself 5 Select the operating system installed on your computer 6 Scroll down the page and expand BIOS 7 Click Download to download the latest version of the BIOS for...

Page 82: ...from the Dell support site available to use NOTE Ensure that you have the file type extensions visible in the operating system OS Steps 1 Browse to the location of the BIOS update executable exe files 2 Rename the BIOS executable files to BIOS_PRE rcv for the earlier version of the BIOS and BIOS_CUR rcv for the latest version of the BIOS For example if the latest version s file name is PowerEdge_T...

Page 83: ...he file to BIOS_IMG rcv For example if the file name is PowerEdge_T30_0 0 5 exe rename it to BIOS_IMG rcv 3 Copy the BIOS_IMG rcv file to the root directory of the USB key 4 If not plugged in plug in the USB drive restart the system press F2 to enter the System Setup and then press power button to shut down the system 5 Start the system 6 While the system is starting up press the Ctrl Esc keys whi...

Page 84: ...r off the Dell laptop 2 Disconnect any peripherals that are connected to the laptop Connect only the AC adapter charger to the laptop 3 Ensure that the LCD screen is clean no dust particles on the surface of the screen 4 Press and hold D key and Power on the laptop to enter LCD built in self test BIST mode Continue to hold the D key until you see color bars on the LCD screen 5 The screen will disp...

Page 85: ... and telephone based support and service options Availability varies by country and product and some services may not be available in your area To contact Dell for sales technical support or customer service issues Steps 1 Go to Dell com support 2 Select your support category 3 Verify your country or region in the Choose a Country Region drop down list at the bottom of the page 4 Select the approp...

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