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Dell Vostro 3420 Service Manual
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Dell Vostro 3420 Service Manual

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Vostro 3420
Service Manual
Regulatory Model: P152G
Regulatory Type: P152G001/P152G003/P152G004/P152G005
April 2023
Rev. A01

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Summary of Contents for Dell Vostro 3420

  • Page 1 Vostro 3420 Service Manual Regulatory Model: P152G Regulatory Type: P152G001/P152G003/P152G004/P152G005 April 2023 Rev. A01...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2022-2023 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
  • Page 3 After working inside your computer..........................9 BitLocker..................................9 Chapter 2: Removing and installing components................10 Recommended tools................................10 Screw list..................................... 10 Major components of Vostro 3420..........................11 Base cover................................... 13 Removing the base cover............................13 Installing the base cover.............................15 Battery....................................16 Lithium-ion battery precautions..........................16 Removing the battery..............................17...
  • Page 4 Heat sink....................................35 Removing the UMA heat sink...........................35 Installing the UMA heat sink............................. 36 Removing the discrete heat sink..........................37 Installing the discrete heat sink..........................38 Display assembly................................39 Removing the display assembly ..........................39 Installing the display assembly..........................42 Display bezel..................................45 Removing the display bezel............................45 Installing the display bezel ............................46 Display panel..................................
  • Page 5 LCD Built-in Self Test (BIST)............................91 System-diagnostic lights..............................91 Recovering the operating system..........................93 Real-Time Clock (RTC Reset)............................93 Backup media and recovery options..........................93 WiFi power cycle................................93 Drain residual flea power (perform hard reset)......................94 Chapter 6: Getting help and contacting Dell................95 Contents...
  • Page 6 You should only perform troubleshooting and repairs as authorized or directed by the Dell technical assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.
  • Page 7 ESD protection is an increasing concern. Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
  • Page 8 It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all insulator parts while performing service and that they use anti-static bags for transporting sensitive components.
  • Page 9 Transporting sensitive components When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport. After working inside your computer About this task NOTE: Leaving stray or loose screws inside your computer may severely damage your computer.
  • Page 10 Removing and installing components NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Recommended tools The procedures in this document may require the following tools: ● Phillips screwdriver #0 ● Plastic scribe Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and...
  • Page 11 USB Type-C Bracket M2x3 Touchpad M2x2 (O.D. 5 mm) Touchpad bracket RF Bracket (for Aluminum and M2x2 (O.D. 7 mm) 3-cell battery only) Major components of Vostro 3420 The following image shows the major components of Vostro 3420. Removing and installing components...
  • Page 12 1. Base cover 2. Battery 3. Speakers 4. Power button with optional fingerprint reader 5. Touchpad 6. Touchpad bracket 7. Power adapter port 8. SSD thermal shield Removing and installing components...
  • Page 13 18. I/O cable 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.
  • Page 14 Steps 1. Remove the four screws (M2x5) that secure the base cover to the palm-rest and keyboard assembly. 2. Loosen the four captive screws that secure the base cover to the palm-rest and keyboard assembly. 3. Using a plastic scribe, pry open the base cover from the recesses located in the U-shaped indents at the top edge of the base cover near the hinges.
  • Page 15 Installing the base cover Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the base cover and provide a visual representation of the installation procedure. Removing and installing components...
  • Page 16 Steps 1. Connect the battery cable to the connector on the system board. 2. Place and snap the base cover into place on the palm-rest and keyboard assembly. 3. Tighten the four captive screws that secure the base cover to the palm-rest and keyboard assembly. 4.
  • Page 17 ● 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 can be dangerous. In such an instance, contact Dell technical support for assistance. See www.dell.com/contactdell.
  • Page 18 About this task The following image indicates the location of the 3-cell battery and provides a visual representation of the installation procedure. Steps 1. Place the battery on the palm-rest and keyboard assembly. 2. Align the screw holes on the battery to the screw holes on the palm-rest and keyboard assembly. 3.
  • Page 19 Steps 1. Using your fingertips, carefully spread apart the securing-clips on each end of the memory-module slot until the memory module pops-up. 2. Remove the memory module from the memory-module slot on the system board. NOTE: Your computer may have up to two memory modules installed. Repeat steps 1 to 2 if there is a second memory. module installed.
  • Page 20 Steps 1. Align the notch on the memory module with the tab on the memory-module slot on the system board. 2. Slide the memory module into the memory-module slot on the system board. 3. Press down on the memory module until the securing clips click, locking the memory module in place. NOTE: Repeat steps 1 to 3 if there is a second memory module to be installed into your computer.
  • Page 21 Steps 1. Remove the screw (M2x3.5) that secures the wireless-card bracket to the system board. 2. Lift the wireless-card bracket from the wireless card. 3. Disconnect the antenna cables from the wireless card. 4. Slide and remove the wireless card from the WLAN slot on the system board. Installing the wireless card Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 22 Steps 1. Slide the wireless card into the WLAN slot on the system board. 2. Connect the antenna cables to the wireless card. The following table provides the antenna-cable color scheme for the wireless card supported by your computer. Table 2. Antenna-cable color scheme Connectors on the Antenna-cable color Silkscreen marking...
  • Page 23 Removing the fan Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task The following images indicate the location of the fan and provide a visual representation of the removal procedure. Steps 1.
  • Page 24 Steps 1. Place the fan on the palm-rest and keyboard assembly. 2. Align the screw holes on the fan to the screw holes on the palm-rest and keyboard assembly. 3. Replace the two (M2x5) screws that secure the fan to the palm-rest and keyboard assembly. 4.
  • Page 25 The following images indicate the location of the M.2 2230 solid state drive and provide a visual representation of the removal procedure. Steps 1. Remove the (M2x2) screw that secures the M.2 thermal plate to the palm-rest and keyboard assembly. 2.
  • Page 26 Steps 1. Align the notch on the M.2 2230 solid state drive with the tab on the M.2 card slot on the system board. 2. Slide the M.2 2230 solid state drive into the M.2 card slot on the system board . 3.
  • Page 27 Steps 1. Remove the (M2x2) screw that secures the M.2 thermal plate to the palm-rest and keyboard assembly. 2. Slide and lift the solid state drive thermal plate off the M.2 2280 solid state drive. 3. Slide and remove the M.2 2280 solid state drive from the M.2 card slot on the system board. Installing the M.2 2280 solid state drive Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 28 Steps 1. Align the notch on the M.2 2280 solid state drive with the tab on the M.2 card slot on the system board. 2. Slide the M.2 2280 solid state drive into the M.2 card slot on the system board. 3.
  • Page 29 Steps 1. Remove the four (M2x2) screws that secure the touchpad bracket to the palm-rest and keyboard assembly. 2. Lift the touchpad bracket off the touchpad. 3. Open the latch and disconnect the touchpad Flexible Flat cable from the connector on the system board. 4.
  • Page 30 Steps 1. Place the touchpad into its slot on the palm-rest and keyboard assembly. 2. Align the screw holes on the touchpad to the screw holes on the palm-rest and keyboard assembly. 3. Replace the two (M2x2) screws that secure the touchpad to the palm-rest and keyboard assembly. 4.
  • Page 31 Steps 1. Remove the two (M2.5x5) screws that secure the right hinge to the palm-rest and keyboard assembly. 2. Disconnect the power-adapter cable from the connector on the system board. 3. Lift the power-adapter port from its slot on the palm-rest and keyboard assembly. Installing the power-adapter port Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 32 Steps 1. Using the alignment post, place the power-adapter port into its slot on the palm-rest and keyboard assembly. 2. Connect the power-adapter port cable to the connector on the system board. 3. Fold the right hinge down and install the two (M2.5x5) screws to secure it to the palm-rest and keyboard assembly. Next steps 1.
  • Page 33 Steps 1. Peel the adhesive tape that secures the speaker cable. 2. Disconnect the speaker cable from the system board. 3. Unroute the speaker cable from the routing guides on the palm-rest and keyboard assembly. 4. Lift the speakers along with its cable from the palm-rest and keyboard assembly. Installing the speakers Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 34 Steps 1. Using the alignment posts, place the speakers on the palm-rest and keyboard assembly. NOTE: Ensure that the alignment posts are threaded through the rubber grommets on the speaker. 2. Route the speaker cable through the routing guides on the palm-rest and keyboard assembly. NOTE: Ensure that the speaker cable is routed to the left of the battery screw hole at the bottom-right corner of the palm-rest.
  • Page 35 3. Connect the speaker cable to the system board. 4. Adhere the adhesive tape to secure the speaker cable. Next steps 1. Install the battery. 2. Install the base cover. 3. Follow the procedure in After working inside your computer. Heat sink Removing the UMA heat sink Prerequisites...
  • Page 36 Steps 1. Loosen the four (M2x3) captive screws that secure the heat sink to the system board. NOTE: Loosen the captive screws in the reverse sequential order mentioned on the heat sink [4 > 3 > 2 > 1]. NOTE: The number of screws varies depending on the configuration ordered.
  • Page 37 Steps 1. Place the heat sink on the system board. 2. Tighten the four (M2x3) captive screws that secure the heat sink to the system board. NOTE: Tighten the captive screws in the sequential order mentioned on the heat sink [1 > 2 > 3 > 4]. NOTE: The number of screws varies depending on the configuration ordered.
  • Page 38 Steps 1. Loosen the seven (M2x3) captive screws that secure the heat sink to the system board. NOTE: Loosen the captive screws in the reverse sequential order mentioned on the heat sink [7>6>5>4>3>2>1]. NOTE: The number of screws varies depending on the configuration ordered. 2.
  • Page 39 Steps 1. Place the heat sink on the system board. 2. Tighten the seven (M2x3) captive screws that secure the heat sink to the system board. NOTE: Tighten the captive screws in the sequential order mentioned on the heat sink [1 > 2 > 3 > 4> 5 > 6 > 7]. NOTE: The number of screws varies depending on the configuration ordered.
  • Page 40 Removing and installing components...
  • Page 41 Steps 1. Remove the four (M2.5x5) screws that secure the display hinges to the palm-rest and keyboard assembly. 2. Disconnect the display cable and the speaker cable from the system board (for systems with plastic chassis). 3. Unroute the speaker cable from the routing guides on the palm-rest and keyboard assembly. 4.
  • Page 42 5. Open the display hinges at an angle of 90 degrees, and place the system on a flat surface. 6. Remove the display assembly from the palm-rest and keyboard assembly. Installing the display assembly CAUTION: The maximum operating angle for the display-panel hinge is 135 degrees. Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 43 Removing and installing components...
  • Page 44 Steps 1. Slide the display assembly at an angle, and place the display assembly on the palm-rest and keyboard assembly. 2. Gently press down on the display hinges to align the screw holes on the display hinges with the screw holes on the palm-rest and keyboard assembly.
  • Page 45 NOTE: The power-adapter port is secured in place by the left display hinge. There is no screw, tape, or adhesives securing the power-adapter port to the palm-rest. As a result technicians should take note of whether or not the power adapter port has fallen out of the system during subsequent removal procedures.
  • Page 46 Steps 1. Pry open the display bezel from the inner edge at the left and right sides of the display assembly. 2. Pry open the display bezel from the inner edge at the top side of the display assembly. 3. Continue to pry open the outer edge of the bottom side of the display bezel. 4.
  • Page 47 Steps Align the display bezel with the display back-cover and antenna assembly, and then gently snap the display bezel into place. Next steps 1. Install the hinge caps. 2. Install the display assembly. 3. Install the wireless card. 4. Install the SSD - M.2 2230 solid-state drive M.2 2280 solid-state drive, whichever applicable.
  • Page 48 5. Remove the display assembly. 6. Remove the hinge caps. 7. Remove the display bezel. 8. Remove the display hinges. NOTE: This procedure applies for models shipped with a plastic chassis only. About this task The following images indicate the location of the display panel and provide a visual representation of the removal procedure. Removing and installing components...
  • Page 49 Steps 1. Remove the two (M2x2) screws that secure the display panel to the back cover. 2. Use a plastic scribe to pry the display panel from the bottom-right corner. 3. Gently start prying the display panel along the left and right sides of the display back-cover using your hands. 4.
  • Page 50 Removing and installing components...
  • Page 51 Steps 1. Place the display panel and display assembly on a clean and flat surface. 2. Connect the display cable to the connector on the display panel and close the latch. 3. Adhere the tape to secure the display-cable connector latch to the display panel. 4.
  • Page 52 Steps 1. Remove the three (M2.5x3.8) screws from the left display hinge. 2. Lift and remove the left display hinge from the display assembly. 3. Remove the three (M2.5x3.8) screws from the right display hinge. 4. Lift and remove the right display hinge from the display assembly. Installing the display hinges Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 53 Steps 1. Align and place the left display hinge on the display assembly. 2. Install the three (M2.5x3.8) screws to secure the left display hinge to the display panel and back cover. 3. Align and place the right display hinge on the display assembly. 4.
  • Page 54 Hinge caps Removing the hinge caps Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the M.2 2230 solid-state drive M.2 2280 solid-state drive, whichever applicable. 4. Remove the wireless card. 5.
  • Page 55 Steps NOTE: Before removing the display hinge caps, open the display hinges to 90 degrees. 1. Pinch the left hinge cap in the center. 2. Using a plastic scribe pry the inner side of the left hinge cap and remove it from the left hinge. 3.
  • Page 56 Steps 1. Align the rib inside the left hinge cap to the outer sides. 2. Push the left hinge cap down until it clicks in place. 3. Align the rib inside the right hinge cap to the outer sides. 4. Push the right hinge cap down until it clicks in place. Next steps 1.
  • Page 57 Steps 1. Using the pull tab, disconnect the camera cable from the camera module. 2. Using a plastic scribe, pry the camera module from the display assembly. NOTE: Start prying the camera module in a sequential order 1>2>3 as indicated on the display back cover. 3.
  • Page 58 Display cable Removing the eDP cable (Plastic) Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the M.2 2230 solid-state drive M.2 2280 solid-state drive, whichever applicable. 4. Remove the wireless card.
  • Page 59 Steps 1. Disconnect the eDP cable from the camera. 2. Peel and remove the eDP cable from the display cover. Installing the eDP cable (Plastic) About this task The following image indicates the location of the eDP cable (in a system shipped with plastic chassis) and provides a visual representation of the installation procedure.
  • Page 60 8. Install the base cover. 9. Follow the procedure in After working inside your computer. Display back-cover and antenna assembly Replacement of the display cover and antenna assembly Prerequisites NOTE: This procedure is applicable for systems shipped with a plastic chassis only. 1.
  • Page 61 Steps After performing the pre-requisites, you are left with the display cover and antenna assembly. I/O board Removing the Input/Output board Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the M.2 2230 solid-state drive M.2 2280 solid-state drive, whichever applicable.
  • Page 62 Installing the Input/Output board Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the I/O board and provide a visual representation of the installation procedure. Steps 1.
  • Page 63 I/O daughter board FFC Removing the Input/Output daughterboard FFC Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the fan. About this task The following image indicates the location of the Input/Output daughter board FFC and provides a visual representation of the removal procedure.
  • Page 64 Steps 1. Place the I/O daughter board FFC on the palm-rest and keyboard assembly. 2. Connect the I/O daughter board FFC the connector on the I/O board. 3. Connect the I/O daughter board FFC the connector on the system board. Next steps 1.
  • Page 65 System board UMA system board connectors The following image shows the different connectors on the UMA system board. 1. I/O board FFC connector 2. eDP connector 3. DC-in port connector 4. Memory module connectors 5. Keyboard FFC connector 6. Backlit FFC connector 7.
  • Page 66 About this task The following images indicate the location of the UMA system board and provide a visual representation of the removal procedure. Steps 1. Disconnect the cables from the system board. NOTE: UMA system board connectors for location of connectors. 2.
  • Page 67 Installing the UMA system board Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the UMA system board and provide a visual representation of the installation procedure.
  • Page 68 Steps 1. Place the system board on the palm-rest and keyboard assembly. 2. Align the screw holes on the system board with the screw holes on the palm-rest assembly. 3. Replace the single (M2x2) screw and two (M2x3) screws that secure the system board to the palm-rest assembly. NOTE: When replacing/reinstalling the system board, DO NOT install a screw to the screw hole at the top side the system board.
  • Page 69 4. Connect the cables to the system board: NOTE: UMA system board connectors for location of connectors. 5. Close the right and align the screw holes on the right hinge with the screw holes on the system board. 6. Replace the two (M2.5x5) screws to secure it to the palm-rest. Next steps 1.
  • Page 70 Discrete system board connectors The following image shows the different connectors on the discrete system board. 1. I/O board FFC connector 2. eDP connector 3. DC-in port connector 4. Memory module connectors 5. Keyboard FFC connector 6. Backlit FFC connector 7.
  • Page 71 Steps 1. Disconnect the cables from the system board. NOTE: Discrete system board connectors for location of connectors. 2. Remove the two (M2.5x5) screws from the right hinge. 3. Remove the single (M2x2) and three (M2x3) screws that secure the system board to the palm-rest. NOTE: For models shipped with a USB Type-C port, a USB Type-C bracket is secured to the system board with single (M2x3) screw.
  • Page 72 Installing the discrete system board Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following images indicate the location of the system board and provide a visual representation of the installation procedure. Removing and installing components...
  • Page 73 Steps 1. Place the system board on the palm-rest and keyboard assembly. 2. Align the screw holes on the system board with the screw holes on the palm-rest assembly. 3. Replace the single (M2x2) screw and three (M2x3) screws that secure the system board to the palm-rest assembly. NOTE: When replacing/reinstalling the system board, DO NOT install a screw to the screw hole at the top side the system board.
  • Page 74 4. Connect the cables to the system board: NOTE: Discrete system board connectors for location of connectors. 5. Close the right and align the screw holes on the right hinge with the screw holes on the system board. 6. Replace the two (M2.5x5) screws to secure it to the palm-rest. Next steps 1.
  • Page 75 Steps 1. Remove the (M2x2) screw that secures the power button with optional fingerprint reader to the palm-rest and keyboard assembly. 2. Peel the fingerprint reader Flexible Flat cable from the palm-rest and keyboard assembly. 3. Lift the power button with optional fingerprint reader, along with its cable, off the palm-rest and keyboard assembly. Installing the power button with optional fingerprint reader Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 76 Steps 1. Using the alignment posts, place the power button with optional fingerprint reader into its slot on the palm-rest and keyboard assembly. 2. Replace the (M2x2) screw that secures the power button with optional fingerprint reader to the palm-rest and keyboard assembly.
  • Page 77 13. Remove the display assembly. 14. Remove the power-adapter port. 15. Remove the power button with optional fingerprint reader. 16. Remove the system board - or discrete, whichever applicable. NOTE: The system board can be removed along with the heat sink. About this task The following image indicates the location of the palm-rest and keyboard assembly and provides a visual representation of the removal procedure.
  • Page 78 Steps After performing the pre-requisites, you are left with the palm-rest and keyboard assembly. Installing the palm-rest and keyboard assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task Removing and installing components...
  • Page 79 Steps NOTE: For systems with a plastic chassis, both the left and right RF metal brackets MUST be transferred to the replacement palm-rest assembly. Place the palm-rest and keyboard assembly on a flat and clean surface and perform the post-requisites to install the palm-rest and keyboard assembly.
  • Page 80 Drivers and downloads When troubleshooting, downloading or installing drivers it is recommended that you read the Dell Knowledge Based article, Drivers and Downloads FAQ 000123347. Drivers and downloads...
  • Page 81 BIOS setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup program. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items listed in this section may or may not be displayed. NOTE: Before you change BIOS Setup program, it is recommended that you write down the BIOS Setup program screen information for future reference.
  • Page 82 One time boot menu To enter one time boot menu, turn on your computer, and then press F12 immediately. NOTE: It is recommended to shutdown the computer if it is on. The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options are: ●...
  • Page 83 Table 5. System setup options—Advanced menu (continued) Advanced Default: Enabled USB Emulation Enables or disables the USB emulation feature. This feature defines how the BIOS, in the absence of a USB-aware operating system, handles USB devices. USB emulation is always enabled during POST. NOTE: You cannot boot any type of USB device (floppy, hard drive, or memory key) when this option is off.
  • Page 84 Default: Disabled SupportAssist System Resolution Auto OS Recovery Threshold Controls the automatic boot flow for SupportAssist System Resolution Console and for the Dell OS Recovery tool. Default: 2 SupportAssist OS Recovery Enables or disables the boot flow for the SupportAssist OS Recovery tool in the even of certain system errors.
  • Page 85 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, search in the Knowledge Base Resource at www.dell.com/support. Steps 1. Go to www.dell.com/support. BIOS setup...
  • Page 86 Updating the BIOS in Windows to download the latest BIOS setup program file. 2. Create a bootable USB drive. For more information, search in the Knowledge Base Resource at www.dell.com/support. 3. Copy the BIOS setup program file to the bootable USB drive.
  • Page 87 One-Time boot menu on the computer. Most of the Dell computers built after 2012 have this capability, and you can confirm by booting your computer to the F12 One-Time Boot Menu to see if BIOS FLASH UPDATE is listed as a boot option for your computer. If the option is listed, then the BIOS supports this BIOS update option.
  • Page 88 Clearing BIOS (System Setup) and System passwords About this task To clear the system or BIOS passwords, contact Dell technical support as described at www.dell.com/contactdell. NOTE: For information on how to reset Windows or application passwords, refer to the documentation accompanying Windows or your application.
  • Page 89 ● Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other computers with your computer.
  • Page 90 Running the SupportAssist Pre-Boot System Performance Check Steps 1. Turn on your computer. 2. As the computer boots, press the F12 key as the Dell logo appears. 3. On the boot menu screen, select the Diagnostics option. 4. Click the arrow at the bottom left corner.
  • Page 91 LCD Built-in Self Test (BIST) Dell laptops have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with the LCD (screen) of the Dell laptop or with the video card (GPU) and PC settings.
  • Page 92 Table 11. System-diagnostic lights (continued) Blinking pattern Amber White Problem description Suggested resolution System board failure (included ● Flash latest BIOS version BIOS corruption or ROM ● If problem persists, error) replace the system board. No memory/RAM detected ● Confirm that the memory module is installed properly.
  • Page 93 It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its factory state. You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures.
  • Page 94 6. Install the battery. 7. Install the base cover. 8. Connect the power adapter to your computer. 9. Turn on your computer. NOTE: For more information about performing a hard reset, search in the Knowledge Base Resource at www.dell.com/ support. Troubleshooting...
  • Page 95 Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 12. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell app...

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P152g