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Dell Inspiron 7490 P115G Service Manual
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Dell Inspiron 7490 P115G Service Manual

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Inspiron 7490
Service Manual
Regulatory Model: P115G
Regulatory Type: P115G001

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Summary of Contents for Dell Inspiron 7490 P115G

  • Page 1 Inspiron 7490 Service Manual Regulatory Model: P115G Regulatory Type: P115G001...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2018 - 2019 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

    Contents 1 Working inside your computer....................... 6 Safety instructions.................................6 Before working inside your computer..........................6 Before you begin ................................6 Electrostatic discharge—ESD protection.......................... 7 ESD field service kit ................................7 Transporting sensitive components............................ 8 After working inside your computer............................ 8 2 Removing and installing components..................... 9 Recommended tools................................9 Screw list....................................
  • Page 4 Speakers....................................34 Removing the speaker..............................34 Installing the speaker..............................35 Touchpad....................................36 Removing the touchpad............................... 36 Installing the touchpad..............................37 Display assembly.................................. 38 Removing the display assembly........................... 38 Installing the display assembly............................40 I/O board....................................42 Removing the I/O board...............................42 Installing the I/O board..............................43 Power button..................................
  • Page 5 LCD Built-in Self Test (BIST) ..........................78 Recovering the operating system............................78 Flashing BIOS (USB key)..............................78 Flashing the BIOS................................79 WiFi power cycle..................................79 Flea power release................................79 Enabling Intel Optane memory............................80 Disabling Intel Optane memory............................80 6 Getting help and contacting Dell....................81 Contents...

  • Page 6: 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 shipped with the product or at www.dell.com/regulatory_compliance.

  • Page 7: Electrostatic Discharge-Esd Protection

    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

    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.

  • Page 9: Removing And Installing Components

    Removing and installing components Recommended tools The procedures in this document require the following tools: • Phillips #0 screwdriver • Phillips #1 screwdriver • Philips #2 screwdriver • Plastic scribe • T-30 torx screwdriver NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4 Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws,...

  • Page 10: Nano-Sim Card Tray

    Component Secured to Screw type Quantity Screw image Touchpad Palm-rest assembly M1.6x2 Hinges Palm-rest assembly M2x4.5 Display-cable bracket System board M2x3.5 I/O board Palm-rest assembly M2x3 Power button Palm-rest assembly M1.4x2.3 Power button with Palm-rest assembly M1.4x2.3 optional fingerprint reader NOTE: Applicable for computers...

  • Page 11: Installing The Nano-Sim Card Tray

    Steps 1. Insert the SIM eject tool (or paper clip) into the hole, next to the Nano-SIM card tray until the tray pops out. 2. Pull the tray out of the computer. Installing the Nano-SIM card tray 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 Nano-SIM card tray and provides a visual representation of the removal procedure.

  • Page 12: Base Cover

    Steps Push the Nano-SIM card tray back into the slot. Base cover Removing the base cover Prerequisites 1. Follow the procedure in before working inside your computer. About this task The following image indicates the location of the base cover and provides a visual representation of the removal procedure. Removing and installing components...

  • Page 13: Installing The Base Cover

    Steps 1. Loosen the three captive screws on the base cover. 2. Remove the six screws (M2x3.5) that secure the base cover to the palm-rest assembly. 3. Using a plastic scribe, pry the base cover starting from the top-left corner of the palm-rest assembly. 4.
  • Page 14 Steps 1. Align the base cover on the palm-rest assembly, and snap the base cover into place. 2. Replace the six screws (M2x3.5) that secure the base cover to the palm-rest assembly. 3. Tighten the three captive screws that secure the base cover to the palm-rest assembly. Removing and installing components...

  • Page 15: Solid-State Drive/Intel Optane

    Next steps 1. Follow the procedure in after working inside your computer. Solid-state drive/Intel Optane Removing the M.2 2280 solid-state drive/Intel Optane Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the base cover. NOTE: M.2 2280 solid-state drive/Intel Optane is supported in computers shipped with WLAN card only. About this task You need to disable the Intel Optane device before removing it from your computer.

  • Page 16: Installing The M.2 2280 Solid-State Drive/Intel Optane

    Steps 1. Disconnect the battery cable from the system board. 2. Remove the screw (M2x3) that secures the solid-state drive shield to the system board. NOTE: Solid-state drive shield is available only in computers that are shipped with Intel Optane or solid-state drive that has a capacity of more than 512 GB.
  • Page 17 Steps 1. Align the notch on the M.2 2280 solid-state drive/Intel Optane with the tab on the solid-state drive slot. 2. Slide the M.2 2280 solid-state drive/Intel Optane into the solid-state drive slot on the system board. 3. Align and replace the solid-state drive shield on the solid-state drive slot on the system board. NOTE: Solid-state drive shield is available only in computers that are shipped with Intel Optane or solid-state drive that has a capacity of more than 512 GB.

  • Page 18: Solid-State Drive

    Solid-state drive Removing the M.2 2230 solid-state drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. About this task The following image indicates the location of the M.2 2230 solid-state drive and provides a visual representation of the removal procedure. NOTE: Computers shipped with WWAN card supports only M.2 2230 solid-state drive.

  • Page 19: Installing The M.2 2230 Solid-State Drive

    4. Slide and remove the solid-state drive shield off the M.2 2230 solid-state drive on the system board. NOTE: Applicable in computers shipped with WWAN card. 5. Slide and remove the M.2 2230 solid-state drive off the solid-state drive 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 procedure.

  • Page 20: 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 21: Installing The Battery

    Steps 1. Disconnect the battery cable from the system board. 2. Remove the four screws (M2x2) that secure the battery to the palm-rest assembly. 3. Lift the battery off the palm-rest assembly. Installing the battery 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 battery and provides a visual representation of the installation procedure.

  • Page 22: Coin-Cell Battery

    Steps 1. Using the alignment post, place the battery on the palm-rest assembly. 2. Connect the battery cable to the system board. 3. Replace the four screws (M2x2) that secure the battery to the palm-rest assembly. Next steps 1. Install the base cover.

  • Page 23: Installing The Coin-Cell Battery

    Steps 1. Disconnect the coin-cell battery cable from the system board. 2. Using a plastic scribe, lift and peel the coin-cell battery off the palm-rest assembly. Installing the coin-cell battery 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 coin-cell battery and provides a visual representation of the installation procedure.

  • Page 24: Wwan Card

    Steps 1. Adhere the coin-cell battery to the slot on the palm-rest assembly. 2. Connect the coin-cell battery cable 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.

  • Page 25: Installing The Wwan Card

    Steps 1. Lift the WWAN-card shield off the WWAN card. 2. Remove the screw (M2x3) that secures the WWAN-card bracket to the WWAN card. 3. Note the alignment of the WWAN-card bracket before lifting it off the WWAN card. 4. Disconnect the antenna cables from the WWAN card. 5.
  • Page 26 Steps 1. Align the notch on the WWAN card with the tab on the WWAN-card slot and insert the WWAN card at an angle into the WWAN-card slot. 2. Connect the antenna cables to the WWAN card and align the WWAN-card bracket on the WWAN card. The following table provides the antenna-cable color scheme for the WWAN card supported by your computer.

  • Page 27: Heat Sink

    3. Follow the procedure in After working inside your computer. Heat sink Removing the heatsink (on computers shipped with discrete graphics card) Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the base cover. 3. Remove the battery. About this task The following image indicates the location of the base cover and provides a visual representation of the installation procedure.

  • Page 28: Removing The Heatsink (On Computers Shipped With Integrated Graphics Card)

    About this task The following image indicates the location of the base cover and provides a visual representation of the installation procedure. Steps 1. Place and align the screw holes on the heat sink with the screw holes on the system board. 2.

  • Page 29: Installing The Heat Sink (On Computers Shipped With Integrated Graphics Card)

    Steps 1. Peel the tapes that secure the fan to the fan to the heat sink. 2. Peel the tapes that secure the I/O-board cable to the shield on the heat sink. 3. Peel the tapes that secure the WWAN antenna cables to the shield on the heat sink. 4.
  • Page 30 About this task The following image indicates the location of the base cover and provides a visual representation of the installation procedure. Steps 1. Place and align the screw holes on the heat sink with the screw holes on the system board. 2.

  • Page 31: Fan

    Removing the fan (on computers shipped with discrete graphics card) Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the base cover. 3. Remove the battery. About this task The following image indicates the location of fan and provides a visual representation of the removal procedure. Steps 1.

  • Page 32: Installing The Fan (On Computers Shipped With Discrete Graphics Card)

    Installing the fan (on computers shipped with discrete graphics card) 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 fan and provides a visual representation of the installation procedure. Steps 1.

  • Page 33: Removing The Fan (On Computers Shipped With Integrated Graphics Card)

    Removing the fan (on computers shipped with integrated graphics card) Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the base cover. 3. Remove the battery. About this task The following image indicates the location of fan and provides a visual representation of the removal procedure. Steps 1.

  • Page 34: Speakers

    About this task The following image indicates the location of fan and provides a visual representation of the installation procedure. Steps 1. Place and align the screw holes on the fan with the screw holes on the palm-rest assembly. 2. Replace the three screws (M2x3) that secure the fan to the palm-rest assembly. 3.

  • Page 35: Installing The Speaker

    About this task The following image indicates the location of speakers and provides a visual representation of the removal procedure. Steps 1. Disconnect the speaker cable from the I/O board. 2. Peel the tapes that secure the speaker cable to the palm-rest assembly. 3.

  • Page 36: Touchpad

    Steps 1. Using the alignment posts and rubber grommets, place the speakers in the slots on the palm-rest assembly. NOTE: Push the rubber grommets into the slots if it pops out. 2. Route the speaker cable through the routing guides on the palm-rest assembly. 3.

  • Page 37: Installing The Touchpad

    Steps 1. Open the latch and disconnect the touchpad cable from the touchpad. 2. Remove the four (M1.6x2) screws that secure the touchpad bracket to the palm-rest assembly. 3. Peel the touchpad cable from the touchpad. 4. Slide and lift the touchpad along with the bracket off the palm-rest assembly. Installing the touchpad Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 38: Display Assembly

    Steps 1. Using the alignment post, slide and place the touchpad along with the bracket into the slot on the palm-rest assembly. 2. Adhere the touchpad cable from the touchpad. 3. Replace the four (M1.6x2) screws that secure the touchpad bracket to the palm-rest assembly. 4.
  • Page 39 Steps 1. Remove the three screws (M2x3.5) that secures the display-cable bracket to the system board. 2. Lift the display-cable bracket off the system board. Removing and installing components...

  • Page 40: Installing The Display Assembly

    3. Pull the display cable from the connector to disconnect the display cable from the system board. 4. Pull the touchscreen cable from the connector to disconnect the touchscreen cable from the system board. NOTE: Applicable only on computers with touchscreen configuration. 5.
  • Page 41 Steps 1. Place the palm-rest assembly at the edge of the table. 2. Align the screw holes on the palm-rest assembly with the screw holes on the display hinges. 3. Close the display and turn the computer over. Removing and installing components...

  • Page 42: I/O Board

    4. Replace the four screws (M2x4.5) that secures the display hinges to the palm-rest assembly. 5. Slide the display cable into the connector to connect the display cable on to the connector on the system board. 6. Slide the touchscreen cable into the connector to connect the touchscreen cable on to the connector on the system board. NOTE: Applicable only on computers with touchscreen configuration.

  • Page 43: Installing The I/O Board

    Steps 1. Disconnect the speaker cable from the I/O board. 2. Disconnect the I/O-board power cable from the I/O board. 3. Open the latch and disconnect the I/O-board data cable from the I/O board. CAUTION: Do not disconnect the 40-pin I/O-board cable from the I/O board without removing the latch. The connector will be damaged if you attempt to disconnect the cable without opening the latch.

  • Page 44: Power Button

    Next steps 1. Install the fan (discrete graphics card) fan (integrated graphics card), whichever applicable. 2. Install the battery. 3. Install the base cover. 4. Follow the procedure in after working inside your computer. Power button Removing the power button Prerequisites 1.

  • Page 45: Installing The Power Button

    Installing the power button 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 power button and provides a visual representation of the installation procedure. Steps 1.

  • Page 46: Installing The Power Button With Optional Fingerprint Reader

    1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Remove the battery. 4. Remove the fan (discrete graphics card) fan (integrated graphics card), whichever applicable. 5. Remove the board. About this task The following image indicates the location of power button with optional fingerprint reader and provides a visual representation of the removal procedure.

  • Page 47: System Board

    Steps 1. Align and place the power button with fingerprint reader on the palm-rest assembly. 2. Adhere the tapes that secure the finger-print reader cable and the fingerprint-reader board to the keyboard. 3. Close the latch and connect the power-button cable to the fingerprint-reader board. 4.
  • Page 48 About this task The following image indicates the connectors on your system board. Figure 1. System-board connectors 1. Display cable 2. Touchscreen cable (available only in touchscreen computers) 3. Coin-cell battery cable 4. Keyboard-backlit cable 5. Keyboard cable 6. Fingerprint-reader cable 7.
  • Page 49 Removing and installing components...
  • Page 50 Removing and installing components...
  • Page 51 Steps 1. Remove the screw (M1.6x2.5) that secures the WLAN-card bracket to the WLAN card. 2. Lift the WLAN-card bracket off the WLAN card. 3. Disconnect the WLAN antenna cables from the WLAN card. 4. Peel the tapes that secure the WLAN antenna cables to the system board and remove them from the routing guides on the system board.

  • Page 52: Installing The System Board

    Installing the system 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 connectors on your system board. Figure 2. System-board connectors 1. Display cable 2.
  • Page 53 Removing and installing components...
  • Page 54 Removing and installing components...
  • Page 55 Steps 1. Connect the I/O-board data cable to the connector on the system board. NOTE: When replacing the system board, technician must remember to connect the I/O-board cable to the I/O connector that is located under the system board; Failing to do so, will result in additional repair time of replacing the system board again.

  • Page 56: Keyboard

    NOTE: Applicable on computers shipped with WWAN card. 11. Replace the screw (M2x3) that secures the system board to the palm-rest assembly. 12. Replace the screw (M2x3) that secures the solid-state drive extension bracket to the system board and palm-rest assembly. 13.

  • Page 57: Installing The Keyboard

    Steps 1. Remove the screw (M1.4x2.3) that secures the fan bracket to the palmrest. 2. Remove the fan bracket off the palmrest. 3. Peel the tapes that secure the antenna cables to the keyboard. NOTE: Applicable on computers shipped with WWAN card. 4.
  • Page 58 Steps 1. Align the screw holes on the keyboard with the screw holes on the palmrest. 2. Replace the 28 screws (M1.2x1.5) that secure the keyboard to the palmrest. 3. Adhere the tapes that secure the antenna cables to the keyboard. NOTE: Applicable on computers shipped with WWAN card.

  • Page 59: Palmrest

    8. Install the M.2 2280 solid-state drive/Intel Optane M.2 2230 solid-state drive, whichever applicable. 9. Install the battery. 10. Install the base cover. 11. Follow the procedure in after working inside your computer. Palmrest Removing the palmrest Prerequisites 1. Follow the procedure in before working inside your computer.

  • Page 60: Installing The Palmrest

    Steps After performing the steps in the pre-requisites, we are left with the palm rest. Installing the palmrest Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following image indicates the palmrest and provides a visual representation of the installation procedure. Steps Place the palmrest on a flat surface.

  • Page 61: Device Drivers

    Downloading the audio driver Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. 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.

  • Page 62: Downloading The Chipset Driver

    Downloading the chipset driver Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. 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.

  • Page 63: Downloading The Wifi Driver

    Downloading the WiFi driver Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. 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.

  • Page 64: Downloading The Graphics Driver

    Downloading the graphics driver Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. 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.

  • Page 65: System Setup

    Boot Sequence allows you to bypass the System Setup–defined boot device order and boot directly to a specific device (for example: optical drive or hard drive). During the Power-on Self Test (POST), when the Dell logo appears, you can: •...

  • Page 66: System Setup Options

    System setup options NOTE: Depending on this computer and its installed devices, the items that are listed in this section may or may not be displayed. Table 3. System setup options—System information menu Overview BIOS Version Displays the BIOS version number. Service Tag Displays the Service Tag of the computer.
  • Page 67 Overview Device Information Video Controller Displays the integrate graphics information of the computer. dGPU Video Controller Displays the discrete graphics information of the computer. Video BIOS Version Displays the video BIOS version of the computer. Video Memory Displays the video memory information of the computer. Panel Type Displays the Panel Type of the computer.
  • Page 68 System Configuration USB/Thunderbolt Configuration Enable Boot Support Enables or disables booting from USB mass storage devices such as external hard drive, optical drive, and USB drive. Enable External USB Ports Enables or disables USB ports to be functional in an operating system environment. Enable Thunderbolt Technology Support Enables or disables Thunderbolt Technology support.
  • Page 69 Table 7. System setup options—Security menu Security Enable Admin Setup Lockout Enables or disables the user from entering BIOS Setup when an Admin Password is set. Default: OFF. Password Bypass Bypass the System (Boot) Password and the internal hard drive password prompts during a system restart.
  • Page 70 Table 8. System setup options—Secure Boot menu Secure Boot Enable Secure Boot Enables or disables the computer to boos using only validated boot software. Default: OFF. NOTE: For Secure Boot to be enabled, the computer needs to be in UEFI boot mode and the Enable Legacy Option ROMs option needs to be turned off.
  • Page 71 Power Management Wake on Dell USB-C Dock Enables the USB-C dock to wake the computer from Standby mode. Default: ON. NOTE: This feature works only if the power adapter is connected to the computer. Auto on Time Enables the computer to automatically power on for defined days and times.
  • Page 72 Table 13. System setup options—POST Behavior menu POST Behavior Numlock Enable Enables or disables Numlock when the computer boots. Default: ON. Enable Adapter Warnings Enables the computer to display adapter warning messages during boot. Default: ON. Extend BIOS POST Time Configures the BIOS POST (Power-On Self-Test) load time.

  • Page 73: System And Setup Password

    Dell Auto operating system Recovery Controls the automatic boot flow for SupportAssist System Resolution Console and Threshold for Dell operating system Recovery tool. Default: 2. SupportAssist operating system Recovery Enables or disables the boot flow for SupportAssist operating system Recovery tool in the even of certain system errors.

  • Page 74: Assigning A System Setup Password

    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 re-boot. Steps 1.

  • Page 75: Real Time Clock (Rtc) Battery Reset

    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 76: Troubleshooting

    Running the ePSA diagnostics 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 77: Diagnostics

    The power and battery-status light blinks amber along with beep codes indicating failures. For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected. The following table shows different power and battery-status light patterns and associated problems.

  • Page 78: M-Bist

    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 79: Flashing The Bios

    4. Connect the bootable USB drive to the computer that needs the BIOS update. 5. Restart the computer and press F12 when the Dell logo is displayed on the screen. 6. Boot to the USB drive from the One Time Boot Menu.

  • Page 80: Enabling Intel Optane Memory

    Steps 1. Turn off your computer. 2. Disconnect the power adapter from your computer. 3. Press and hold the power button for 15 seconds to drain the flea power. 4. Connect the power adapter to your computer. 5. Turn on your computer. Enabling Intel Optane memory Steps 1.

  • Page 81: 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 21. Self-help resources Self-help resources Resource location Information about Dell products and services www.dell.com My Dell Tips Contact Support In Windows search, type Contact Support, and press Enter.

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