Dell Inspiron 15 3520 Service Manual
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Dell Inspiron 15 3520 Service Manual

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Inspiron 15 3520
Service Manual
Regulatory Model: P112F
Regulatory Type: P112F001/P112F002/P112F007/P112F008
March 2022
Rev. A00

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Summary of Contents for Dell Inspiron 15 3520

  • Page 1 Inspiron 15 3520 Service Manual Regulatory Model: P112F Regulatory Type: P112F001/P112F002/P112F007/P112F008 March 2022 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2022 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: Table Of Contents

    After working inside your computer..........................9 Chapter 2: Removing and installing components................10 Recommended tools................................10 Screw list..................................... 10 Major components of Inspiron 15 3520......................... 11 Secure Digital (SD) Card..............................13 Removing the Secure Digital card..........................13 Installing the Secure Digital card..........................13 Base cover................................... 14 Removing the base cover............................14...
  • Page 4 Memory modules................................42 Removing the memory modules..........................42 Installing the memory modules..........................43 Speakers....................................44 Removing the speakers..............................44 Installing the speakers..............................44 Heat sink....................................45 Removing the heat sink............................. 45 Installing the heat sink..............................46 Fan......................................47 Removing the fan................................ 47 Installing the fan................................48 Power-button board.................................
  • Page 5 Updating the BIOS from the F12 One-Time boot menu................... 104 Chapter 5: Troubleshooting....................... 106 Handling swollen Lithium-ion batteries........................106 Locate the Service Tag or Express Service Code of your Dell computer ..........106 System-diagnostic lights..............................107 SupportAssist diagnostics............................. 108 Built-in self-test (BIST)..............................108 M-BIST..................................

  • Page 6: Chapter 1: Working Inside Your Computer

    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: Electrostatic Discharge-Esd Protection

    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: Transporting Sensitive Components

    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: After Working Inside Your Computer

    After working inside your computer About this task NOTE: Leaving stray or loose screws inside your computer may severely damage your computer. Steps 1. Replace all screws and ensure that no stray screws remain inside your computer. 2. Connect any external devices, peripherals, or cables you removed before working on your computer. 3.

  • Page 10: Chapter 2: Removing And Installing Components

    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: Major Components Of Inspiron 15 3520

    System board M2x3.5 M2x2 (OD=5) USB Type-C bracket M2x3.5 Touchpad M2x2 (OD=5) Big Head Touchpad bracket M2x2 (OD=5) Big Head Major components of Inspiron 15 3520 The following image shows the major components of Inspiron 15 3520. Removing and installing components...
  • Page 12 Removing and installing components...

  • Page 13: Secure Digital (Sd) Card

    1. Base cover 2. Battery 3. Speakers 4. Power-button with optional fingerprint-reader 5. Touchpad 6. Touchpad bracket 7. Power-adapter port 8. Solid-state drive thermal plate 9. M.2 solid-state drive 10. Palm-rest and keyboard assembly 11. Display assembly 12. Memory modules 13.

  • Page 14: Base Cover

    About this task Steps Slide the secure digital into the slot until it clicks into place. Next steps 1. Follow the procedure in After working inside your computer. Base cover Removing the base cover Prerequisites 1. Follow the procedure in Before working inside your computer.
  • Page 15 Removing and installing components...
  • Page 16 Removing and installing components...
  • Page 17 Removing and installing components...

  • Page 18: Installing The Base Cover

    Steps 1. Remove the six screws (M2x5) that secure the base cover to the palm-rest and keyboard assembly. 2. Loosen the two 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 19 Removing and installing components...
  • Page 20 Removing and installing components...

  • Page 21: Battery

    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 two captive screws that secure the base cover to the palm-rest and keyboard assembly. 4.

  • Page 22: Removing The 3-Cell Battery

    ● 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 23: Removing The 4-Cell Battery

    Removing the 4-cell battery Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. About this task The following image indicates the location of the 4-cell battery and provides a visual representation of the removal procedure. Steps 1.

  • Page 24: Installing The 4-Cell Battery

    Installing the 4-cell battery Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following image indicates the location of the 4-cell battery and provides a visual representation of the installation procedure. Removing and installing components...

  • Page 25: Disconnecting The Battery Cable

    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. Replace the four (M2x3) screws that secure the battery to the palm-rest and keyboard assembly. 4.

  • Page 26: Connecting The Battery Cable

    Steps 1. Lift the latch on the battery cable. 2. Disconnect the battery cable from the connector on the battery. Connecting the battery cable 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 battery cable and provide a visual representation of the installation procedure.

  • Page 27: M.2 Solid-State Drive

    Steps 1. Connect the battery cable to the connector on the battery. 2. Close the latch on the battery cable connector to secure it to the battery. Next steps 1. Install the base cover. 2. Install the card. 3. Follow the procedure in After working inside your computer.

  • Page 28: Installing The M.2 2230 Solid State Drive

    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 solid state drive. 3. Slide and remove the M.2 2230 solid state drive from the M.2 card slot on the system board. Installing the M.2 2230 solid state drive Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

  • Page 29: Removing The M.2 2280 Solid State Drive

    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 30: Installing The M.2 2280 Solid State Drive

    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 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 31: Wireless Card

    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 32: Installing The Wireless Card

    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 33 About this task The following images indicate the location of the wireless card and provide a visual representation of the installation procedure. Steps 1. 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.

  • Page 34: I/O Board

    2. Slide the wireless card into the WLAN slot on the system board. 3. Place the wireless-card bracket on the wireless card. 4. Replace the screw (M2x3.5) that secures the wireless-card bracket to the system board. Next steps 1. Install the base cover.

  • Page 35: Installing The Input/Output Board

    6. Lift the I/O board off the palm-rest and keyboard assembly. 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 36: I/O Daughter Board Ffc

    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 card. 3. Remove the base cover. 4. 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 in an aluminum chassis.

  • Page 37: Installing The Input/Output Daughter Board Ffc

    Steps 1. Open the latch and disconnect the I/O daughter board cable from the I/O board. 2. Open the latch and disconnect the I/O daughter board cable from the system board. 3. Lift the I/O daughter board cable off the palm-rest and keyboard assembly. NOTE: For systems shipped with a plastic chassis, slide the I/O daughter board cable underneath the wireless card antenna cables and lift off the palm-rest and keyboard assembly.
  • Page 38 For systems shipped with a plastic chassis: Steps 1. Place the I/O daughter board FFC on the palm-rest and keyboard assembly. For systems shipped with a plastic chassis, slide and place the I/O daughter board FFC underneath the wireless card antenna cables on the palm-rest and keyboard assembly.

  • Page 39: Hard Drive 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. Install the fan. 2. Install the base cover. 3. Install the card.

  • Page 40: Installing The Hard Drive

    Steps 1. Disconnect the hard drive cable from the system board. 2. Remove the four (M2x3.5) screws that secure the hard drive assembly to the palm-rest and keyboard assembly. 3. Lift the hard drive assembly and its cable from the palm-rest and keyboard assembly. 4.
  • Page 41 Steps 1. Place and slide the hard drive into the hard-drive bracket. 2. Align the screw holes on the hard drive bracket with the screw holes on the hard drive. 3. Replace the four (M3x3) screws that secure the hard drive to the hard drive bracket. 4.

  • Page 42: Memory Modules

    Memory modules Removing the memory modules Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. About this task The following images indicate the location of the memory modules and provide a visual representation of the removal procedure. Steps 1.

  • Page 43: Installing The Memory Modules

    Installing the memory modules 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 memory modules and provide a visual representation of the installation procedure.

  • Page 44: Speakers

    Speakers Removing the speakers Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. About this task The following images indicate the location of the speakers and provide a visual representation of the removal procedure. Steps 1.

  • Page 45: Heat Sink

    About this task The following images indicate the location of the speakers and provide a visual representation of the installation procedure. 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.

  • Page 46: Installing The Heat Sink

    About this task NOTE: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it. NOTE: For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin can reduce the heat transfer capability of the thermal grease.

  • Page 47: Fan

    Steps 1. Place the heat sink on the system board. 2. Tighten the four 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 48: Installing The Fan

    Steps 1. Disconnect the fan cable from the system board. 2. Remove the two (M2x5) screws that secure the fan to the palm-rest and keyboard assembly. 3. Lift the fan from the palm-rest and keyboard assembly. Installing the fan Prerequisites If you are replacing a component, remove the existing component before performing the installation process.

  • Page 49: Power-Button Board

    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 50: Installing The Power Button

    3. Remove the base cover. 4. Remove the wireless card. 5. Remove the board. 6. Remove the display assembly. About this task The following images indicate the location of the power button and provide a visual representation of the removal procedure. Steps 1.

  • Page 51: Power Button With Fingerprint Reader

    Steps 1. Place the power-button board into the slot on the palm-rest and keyboard assembly. 2. Install the single (M2x2) screw to secure the power button to the palm-rest and keyboard assembly. Next steps 1. Install the display assembly. 2. Install the wireless card.

  • Page 52: Installing The Power Button With Optional Fingerprint Reader

    About this task The following images indicate the location of the power button with optional fingerprint reader and provide a visual representation of the removal procedure. Steps 1. Remove the two (M2.5x5) screws that secure the display assembly hinge to the palm-rest and keyboard assembly. 2.
  • Page 53 Steps 1. Using the alignment posts, place the power button with fingerprint reader into its slot on the palm-rest and keyboard assembly. 2. Replace the (M2x2) screw that secures the power button with fingerprint reader to the palm-rest and keyboard assembly. 3.

  • Page 54: Display Assembly

    Display assembly Removing the display assembly Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. 4. Remove the wireless card. About this task The following images indicate the location of the display assembly and provide a visual representation of the removal procedure. Removing and installing components...
  • Page 55 Removing and installing components...
  • Page 56 Removing and installing components...
  • Page 57 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). NOTE: Disconnect only the display cable from the system board for systems with aluminum chassis. 3.

  • Page 58: Installing The Display Assembly

    antennas are attached to the palm-rest assembly, therefore it is not required to disconnect and unroute the WLAN antenna cables. 4. Open the display hinges at an angle of 90 degrees, and place the system on a flat surface. 5. Remove the display assembly from the palm-rest and keyboard assembly. Installing the display assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation process.
  • Page 59 Removing and installing components...
  • Page 60 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 61: Hinge Caps

    5. Connect the display cable to the connector on the system board. Next steps 1. Install the wireless card. 2. Install the base cover. 3. Install the card. 4. Follow the procedure in After working inside your computer. Hinge caps Removing the hinge caps Prerequisites NOTE:...
  • Page 62 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 63: Installing The Hinge Caps

    Installing the hinge caps Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. NOTE: This procedure is applicable for systems with plastic chassis. About this task The following images indicate the location of the hinge caps and provide a visual representation of the installation procedure. Removing and installing components...

  • Page 64: Display Bezel

    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 65: Installing The Display Bezel

    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 66: Hinges

    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 cap. 2. Install the display assembly. 3. Install the wireless card. 4. Install the base cover.
  • Page 67 4. Remove the wireless card. 5. Remove the display assembly. 6. Remove the hinge caps. 7. Remove the display bezel. About this task The following images indicate the location of the hinge caps and provide a visual representation of the installation procedure. Removing and installing components...

  • Page 68: Installing The Hinges

    Steps 1. Remove the three (M2.5x3.8) screws from the left hinge. 2. Lift and remove the left hinge from the display assembly. 3. Remove the three (M2.5x3.8) screws from the right hinge. 4. Lift and remove the right hinge from the display assembly. Installing the hinges Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 69 Steps 1. Align and place the left hinge on the display assembly. 2. Install the three (M2.5x3.8) screws to secure the hinge to the display panel and back cover. 3. Align and place the right hinge on the display assembly. 4.

  • Page 70: Display Panel

    2. Install the hinge cap. 3. Install the display assembly. 4. Install the wireless card. 5. Install the base cover. 6. Install the card. 7. Follow the procedure in After working inside your computer. Display panel Removing the display panel Prerequisites NOTE: This procedure is applicable for systems with a plastic chassis only.
  • Page 71 Removing and installing components...
  • Page 72 Removing and installing components...

  • Page 73: Installing The Display Panel

    Steps 1. Use a plastic scribe to pry the display panel from the bottom-right corner. 2. Gently start prying the display panel along the left and right sides of the display back-cover using your hands. 3. Lift the bottom side of the display panel and slide it downward to release the display brackets from the slots at the top side of the display cover.
  • Page 74 Removing and installing components...
  • Page 75 Removing and installing components...
  • Page 76 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 77: Camera Module

    Camera module Removing the camera module Prerequisites NOTE: This procedure is applicable for systems with a plastic chassis only. 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. 4. Remove the wireless card.

  • Page 78: Installing The Camera Module

    Installing the camera module 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 camera module and provide a visual representation of the installation procedure.

  • Page 79: Edp Cable

    eDP cable Removing the eDP cable Prerequisites NOTE: The eDP cable removal procedure is applicable only for systems with plastic chassis. 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. 4.

  • Page 80: Installing The Edp Cable

    Steps 1. Disconnect the eDP cable from the camera. 2. Peel and remove the eDP cable from the display cover. Installing the eDP cable About this task NOTE: The eDP cable installation procedure is applicable only for systems with plastic chassis. The following image indicates the location of the eDP cable and provides a visual representation of the installation procedure.
  • Page 81 Steps 1. Adhere the tape to securing the eDP cable to the display back cover. 2. Connect the eDP cable to the camera. Next steps 1. Install the display panel. 2. Install the hinges. 3. Install the display bezel. 4. Install the hinge caps.

  • Page 82: Display Cover And Antenna Assembly

    9. Follow the procedure in After working inside your computer. Display 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. Follow the procedure in Before working inside your computer.

  • Page 83: Touchpad

    Steps After performing the pre-requisites, you are left with the display cover and antenna assembly. Touchpad Removing the touchpad Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the card. 3. Remove the base cover. 4. Remove the 3-cell battery 4-cell battery (whichever applicable).

  • Page 84: Installing The Touchpad

    Steps 1. Open the latch and disconnect the hard drive cable from the connector on the system board. 2. Remove the three (M2x2) screws that secure the touchpad bracket to the palm-rest and keyboard assembly. 3. Lift the touchpad bracket off the touchpad. 4.

  • Page 85: System Board

    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 86 3. Remove the base cover. 4. Remove the 3-cell battery 4-cell battery (whichever applicable). 5. Remove the M.2 2230 solid-state drive M.2 2280 solid-state drive (whichever applicable). 6. Remove the memory modules. 7. Remove the wireless card. 8. Remove the fan. 9.
  • Page 87 Removing and installing components...

  • Page 88: Installing The System Board

    Steps 1. Remove the two (M2.5x5) screws from the right hinge. 2. Pry open the right-display hinge at an angle of 90 degrees. 3. Disconnect the following cables from the system board: a. I/O board Flexible Flat cable b. Speaker cable c.
  • Page 89 1. Fan connector 2. I/O board FFC connector 3. eDP connector 4. DC-in port connector 5. Keyboard FFC connector 6. Keyboard-backlight FFC connector 7. Battery connector 8. Memory modules 9. Touchpad FFC connector 10. Hard drive FFC connector 11. Wireless connector 12.
  • Page 90 Removing and installing components...

  • Page 91: Power-Adapter Port

    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 that secures the system board to the palm-rest assembly. 4.

  • Page 92: Installing The Power-Adapter Port

    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 93: Palm-Rest And Keyboard Assembly

    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 94 8. Remove the speakers. 9. Remove the fan. 10. Remove the heat sink. 11. Remove the board. 12. Remove the hard drive assembly. 13. Remove the touchpad. 14. Remove the display assembly. 15. Remove the power-adapter port. 16. Remove the power button power button with optional FPR.

  • Page 95: Installing The Palmrest And Keyboard Assembly

    Steps After performing the pre-requisites, you are left with the palm-rest and keyboard assembly. Installing the palmrest and keyboard assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation process. About this task The following image indicates the location of the palmrest and keyboard assembly and provides a visual representation of the installation procedure.
  • Page 96 Steps 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. Next steps 1. Install the system board. 2. Install the power button power button with optional FPR.

  • Page 97: Chapter 3: Drivers And Downloads

    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 98: Chapter 4: System Setup

    System 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 99: System Setup Options

    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 (if available) NOTE: XXX denotes the SATA drive number. ● Optical Drive (if available) ●...
  • Page 100 Table 5. System setup options—Advanced menu (continued) Advanced NOTE: You cannot boot any type of USB device (floppy, hard drive, or memory key) when this option is off. Default: Enabled USB PowerShare Enables or disables the USB PowerShare feature. This feature allows the user to charge USB devices cellular phones, portable music players, and so on when the system is on...
  • Page 101 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 102: System And Setup Password

    Table 6. System setup options—Security menu (continued) Security PPI Bypass for Clear Command Allows you to control the TPM Physical Presence Interface (PPI). When enabled, this setting will allow the OS to skip BIOS PPI user prompts when issuing the Clear command. Changes to this setting take effect immediately.

  • Page 103: Assigning A System Setup Password

    6. Press Y to save the changes and exit from System Setup. The computer restarts. 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. System setup...

  • Page 104: Updating The Bios

    Updating the BIOS Updating the BIOS in Windows Steps 1. Go to www.dell.com/support. 2. Click Product support. In the Search support box, enter the Service Tag of your computer, and then click Search. NOTE: If you do not have the Service Tag, use the SupportAssist feature to automatically identify your computer. You can also use the product ID or manually browse for your computer model.
  • Page 105 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 106: Chapter 5: Troubleshooting

    ● 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 107: System-Diagnostic Lights

    System-diagnostic lights This section lists the system-diagnostic lights of your Inspiron 15 3520. Table 10. System-diagnostic lights Blinking pattern Amber White Problem description Suggested resolution CPU failure ● Run the Dell Support Assist/Dell Diagnostics tool. ● If problem persists, replace the system board.

  • Page 108: Supportassist Diagnostics

    NOTE: Blinking 3-3-3 LEDs on Lock LED (Caps-Lock or Nums-Lock), Power button LED (without Fingerprint reader), and Diagnostic LED indicates failure to provide input during LCD panel test on Dell SupportAssist Pre-boot System Performance Check diagnostics. SupportAssist diagnostics About this task The SupportAssist diagnostics (previously known as ePSA diagnostics) performs a complete check of your hardware.

  • Page 109: Lcd Built-In Self Test (Bist)

    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 110: Wifi Power Cycle

    5. Press and hold the power button for 20 seconds to drain the flea power. 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, see the knowledge base article 000130881 www.dell.com/support. Troubleshooting...

  • Page 111: Chapter 6: Getting Help And Contacting Dell

    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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