Dell Inspiron 7790 AIO Inspiron 27-7790 Service Manual

Dell Inspiron 7790 AIO Manual

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  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 1
    Inspiron 27-7790 Service Manual Regulatory Model: W23C Regulatory Type: W23C001 May 2020 Rev. A01
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 2
    data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. © 2019-2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 3
    instructions...6 Before working inside your computer...6 Before you begin ...6 Electrostatic discharge-ESD protection...7 ESD field service heat sink...25 Installing the heat sink...26 Wireless card...27 Removing the wireless card...27 Installing the wireless card...29 Solid-state drive...30 Removing
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 4
    the antennas...40 Installing the antennas...41 Camera...42 Removing the camera...42 Installing the camera...43 Power-button board...44 Removing the 61 Clearing CMOS settings...65 Clearing forgotten passwords...66 5 Troubleshooting...68 Enhanced Pre-Boot System Assessment (ePSA) diagnostics
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 5
    Display built-in self test...68 Diagnostics...69 Recovering the operating system...69 Flashing BIOS (USB key)...70 Flashing the BIOS...70 WiFi power cycle...70 Flea power release...71 6 Getting help and contacting Dell 72 Contents 5
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 6
    , not by its pins. CAUTION: 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 Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 7
    shut-down instructions. 3. Disconnect such as intermittent problems or a shortened Dell products, the sensitivity to static damage is now higher than in previous Dell damage to recognize and troubleshoot is the intermittent (also known as bonding. Use only Field Service kits with a wrist strap, mat,
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 8
    one. desktop or portable environment. Servers are typically installed in a rack within a data center; desktops service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell . Abdominal muscles support your spine when instructions
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 9
    parts that you removed before working on your computer. 4. Connect your computer and all attached devices to their electrical outlets. 5. Turn on your computer. Safety instructions 9
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 10
    display-assembly base 7. system board 9. microphones (2) 11. media-card reader 13. speakers (2) 15. CMOS clear jumper 17. heat sink 2. retractable-camera assembly 4. base panel 6. hard drive 8. solid-state drive 10. wireless-card shield 12. stand 14. password clear jumper 16. fan Recommended tools
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 11
    drive bracket Hard drive M3x3.5 4 System-board shield Display-assembly base M3 0.5x5 4 Retractable-camera assembly door Base panel M3 0.5x5 2 Retractable-camera bezel Retractable-camera M3 0.5x5 3 bracket Speakers Display-assembly base M3 4+7.1xZN 6 Microphone modules Base panel
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 12
    with the stand hanging over the edge. It is recommended to remove the stand to avoid accidental damage to the computer display during servicing. About this task The following image indicates the location of the back cover and provides a visual representation of the removal procedure. Steps 1. Place
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 13
    About this task The following image indicates the location of the back cover and provides a visual representation of the installation procedure. Steps Align the slots on the back cover with the slots on the computer and press along the side to snap the back cover into place. Next steps 1. Follow
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 14
    Steps 1. Remove the five screws (M3x5) that secure the bottom cover to the display-assembly base. 2. Lift the bottom cover off the display-assembly base. Installing the bottom cover Prerequisites If you are replacing a component, remove the existing component before performing the installation
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 15
    surface with the stand hanging over the edge. It is recommended to remove the stand to avoid accidental damage to the computer display during servicing. 2. Remove the back cover. 3. Remove the bottom cover. About this task The following image indicates the location of the stand and provides a visual
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 16
    Steps 1. In the reverse sequential order indicated on the stand, remove the eight screws (M3x4) that secure the stand to the display-assembly base. 2. Remove the stand from the slots on the display-assembly base and lift the stand off the display-assembly base. Installing the stand Prerequisites If
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 17
    Steps 1. Align the screw holes on the stand with the screw holes on the display-assembly base and slide the stand on the display-assembly base. 2. In the sequential order indicated on the stand, replace the eight screws (M3x4) that secure the stand to the display-assembly base. Next steps 1. Install
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 18
    Steps 1. Remove the two screws (M3x5) that secure the hard-drive assembly to the display-assembly base. 2. Slide the hard-drive assembly away from the hard-drive slot on the display-assembly base. 3. Remove the four screws (M3x3.5) that secure the hard-drive bracket to the hard drive. 4. Remove the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 19
    Steps 1. Align the screw holes on the hard drive with the screw holes on the hard-drive bracket. 2. Replace the four screws (M3x3.5) that secure the hard-drive bracket to the hard drive. 3. Slide the hard-drive assembly into the slot on the display-assembly base. 4. Replace the two screws (M3x5)
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 20
    Steps 1. Remove the four screws (M3x5) that secure the system-board shield to the display-assembly base. 2. Lift the system-board shield off the display-assembly base. Installing the system-board shield Prerequisites If you are replacing a component, remove the existing component before performing
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 21
    Steps 1. Align the slots on the system-board shield with the ports on the computer. 2. Replace the four screws (M3x5) that secure the system-board shield to the display-assembly base. Next steps 1. Install the stand. 2. Install the bottom cover. 3. Install the back cover. 4. Follow the procedure in
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 22
    Steps 1. Using your fingertips, spread apart the securing clips on the memory-module slot until the memory module pops up. 2. Slide and remove the memory module from the memory-module slot. NOTE: Repeat step 1 and 2 if there are two memory modules. Installing the memory modules Prerequisites If you
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 23
    Steps 1. Align the notch on the memory module with the tab on the memory-module slot. 2. Slide the memory module firmly into the slot at an angle and press the memory module down until it clicks into place. NOTE: If you do not hear the click, remove the memory module and reinstall it. NOTE: Repeat
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 24
    Steps 1. Using your fingertip, press on the metal clip to release the coin-cell battery from the coin-cell battery holder. 2. Lift the coin-cell battery from the coin-cell battery holder. Installing the coin-cell battery Prerequisites If you are replacing a component, remove the existing component
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 25
    Steps With the positive-side facing up, insert the coin-cell battery into the battery socket on the system board and snap the battery into place. Next steps 1. Install the system-board shield. 2. Install the stand. 3. Install the bottom cover. 4. Install the back cover. 5. Follow the procedure in
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 26
    Steps 1. In reverse sequential order (as indicated on the heat sink), loosen the eight captive screws that secure the heat sink to the system board and the display-assembly base. 2. Lift the heat sink off the system board and display-assembly base. Installing the heat sink Prerequisites If you are
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 27
    . About this task The following image indicates the location of the wireless card and provides a visual representation of the removal procedure. Removing and installing components 27
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 28
    Steps 1. Remove the two screws (M2x4) that secure the wireless-card shield to the system board. 2. Lift the wireless-card shield off the system board and wireless card. 3. Remove the screw (M2x4) that secures the wireless-card bracket to the wireless card. 4. Slide the wireless-card bracket off the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 29
    6. Slide and remove the wireless card from the wireless-card slot. Installing the wireless card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. CAUTION: To avoid damage to the wireless mini-card, do not place any cables
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 30
    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. Antenna-cable color scheme Connectors on the wireless card Main (white triangle) Antenna-cable color White Auxiliary (
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 31
    Steps 1. Remove the screw (M2x2.5) that secures the solid-state drive to the system board. 2. Slide and remove the solid-state drive from the M.2 card slot on the system board. Installing the solid-state drive Prerequisites CAUTION: Solid-state drives are fragile. Exercise care when handling the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 32
    Steps 1. Align the notch on the solid-state drive with the tab on the M.2 card slot. 2. Slide the solid-state drive into the M.2 card slot on the system board. 3. Replace the screw (M2x2.5) that secures the solid-state drive to the system board. Next steps 1. Install the system-board shield. 2.
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 33
    Media-card reader Removing the media-card reader Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the back cover. 3. Remove the bottom cover. 4. Remove the stand. 5. Remove the system-board shield. About this task The following image indicates the location of
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 34
    Steps 1. Connect the media-card reader cable to the system board and close the latch to secure the cable. 2. Insert the media-card reader into the media-card reader slot. 3. Align the screws on the media-card reader with the screw holes on the slot on the display assembly base. 4. Replace the screw
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 35
    base. 2. Remove the six screws (M3 4+7.1xZN) that secure the speakers to the display-assembly base. 3. Remove the speaker cable from the routing guides on the display-assembly base. 4. Lift the speakers along with the cable off the display-assembly base. Installing the speakers Prerequisites If you
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 36
    base. 2. Replace the eight screws (M3 4+7.1xZN) that secure the speakers to the display-assembly base. 3. Route the speaker cable through the routing guide on display-assembly base and connect the speaker cable to the system board. Next steps 1. Install the system-board shield. 2. Install the stand
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 37
    -assembly base. 2. Remove the eight screws (M2X2.5) that secure the microphone modules (2) to the base panel and release them from the routing guides on the display-assembly base. 3. Lift the microphone modules (2) off the slots on the base panel. Installing the mircrophones Prerequisites If you are
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 38
    base. 3. Replace the eight screws (M2X2.5) that secure the microphone module to the base panel. 4. Route the microphone cable through the routing guides on the display-assembly base and connect the microphone cable to the system board. Next steps 1. Install the speakers. 2. Install the system-board
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 39
    and provides a visual representation of the removal procedure. Steps 1. Disconnect the fan cable from the system board. 2. Remove the fan cable from the routing guides on the display-assembly base. 3. Remove the three screws (M2x2.5) that secure the fan to the display-assembly base. 4. Lift the fan
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 40
    -assembly base. 2. Replace the three screws (M2x2.5) that secure the fan to the display-assembly base. 3. Route the fan cable through the routing guides on the display-assembly base. 4. Connect the fan cable to the system board. Next steps 1. Install the system-board shield. 2. Install the stand
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 41
    the antenna modules printed on the display-assembly base as ANT-B (black) and ANT-W (white). Steps 1. Remove the antenna cables from the routing guides on the display-assembly base. 2. Remove the two screws (M2x2.5) that secure the antenna modules (2) to the base panel. 3. Carefully peel the copper
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 42
    to the base panel. 4. Route the antenna cables through the routing guides on the display-assembly base. Next steps 1. Install the speakers. 2. Follow the procedure in After working inside your computer. Camera Removing the camera Prerequisites 1. Follow the procedure in Before working inside your
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 43
    this task The following image indicates the location of the camera and provides a visual representation of the removal procedure. Steps 1. Disconnect the camera cable from the system board. 2. Remove the camera cable from the routing guides on the display-assembly base. 3. Remove the two screws
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 44
    on the base panel. 2. Replace the two screws (M3x5) that secure the retractable-camera assembly to the base panel. 3. Route the camera cable through the routing guides on the display-assembly base. 4. Connect the camera cable to the system board. Next steps 1. Install the system-board shield
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 45
    Steps 1. Open the notch on the side of the power-button board and lift the power-button board from the slot on the base panel. 2. Open the latch, disconnect the power-button board cable from the power-button board then lift off the power-button board. Installing the power-button board Prerequisites
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 46
    board Removing the system board Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board. NOTE: Replacing the system board
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 47
    -board connectors 1. Memory module 3. Touchscreen cable 5. Coin-cell battery 7. Microphone-module cable 9. Speaker cable 11. Display cable 13. Backlit cable 2. Camera cable 4. Debug port 6. Fan cable 8. Media-card reader cable 10. Power-button board cable 12. Hard-drive connector The following
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    cable from the system board. 7. Disconnect the fan cable from the system board. 8. Disconnect the touchscreen cable from the system board. 9. Disconnect the camera cable from the system board. 10. Remove the six screws (M3x5) that secure the system board to the display-assembly base. Installing the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 49
    2. System-board connectors 1. Memory module 3. Touchscreen cable 5. Coin-cell battery 7. Microphones cable 9. Speaker cable 11. Display cable 13. Backlit cable 2. Camera cable 4. Debug port 6. Fan cable 8. Media-card reader cable 10. Power-button board cable 12. Hard-drive connector The following
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 50
    screw holes on the display-assembly base. 2. Replace the six screws (M3x5) that secure the system board to the display-assembly base. 3. Connect the camera cable to the system board. 4. Connect the touchscreen cable to the system board. 5. Connect the fan cable to the system board. 6. Connect the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 51
    your computer. NOTE: Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after the solid-state drive. 15. Remove the power-button board. 16. Remove the camera. 17. Remove the microphones. 18. Remove the system board. 19. Remove the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 52
    52 Removing and installing components
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 53
    Steps 1. Remove the 21 screws (M3x5) that secure the base panel to the display-assembly base. 2. Remove the base panel and lift the base panel off the display-assembly base. Installing the base panel Prerequisites If you are replacing a component, remove the existing component before performing the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 54
    to the display-assembly base. Next steps 1. Install the display panel. 2. Install the system board. 3. Install the microphones. 4. Install the camera. 5. Install the power-button board. 6. Install the solid-state drive. 7. Install the speakers. 8. Install the wireless card. 9. Install the antennas
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 55
    Display panel Removing the display panel Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the back cover. 3. Remove the bottom cover. 4. Remove the hard drive. 5. Remove the system-board shield. 6. Remove the system board. About this task The following image
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 56
    Steps 1. Remove the 12 screws (M3x5) that secure the display panel to the display-assembly base. 2. Place the computer in an upright position. 3. Holding the top corner, push the display panel away from the display-assembly base using the push holes available on the display- assembly base. 4. Route
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 57
    Removing and installing components 57
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 58
    Steps 1. Align and place the display panel on the slots of the display-assembly base. 2. Route the display back-light, touch screen and display cable though the slots on the display assembly base. 3. Place the display-assembly base on a clean and flat surface with the display panel facing down. 4.
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 59
    Intel Serial IO driver In the Device Manager, check if the Intel Serial IO driver is installed. Install the driver updates from www.dell.com/support. Intel Trusted Execution Engine Interface In the Device Manager, check if the Intel Trusted Execution Engine Interface driver is installed. Install the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 60
    . Use the BIOS Setup program for the following purposes: • Get information about the hardware installed in your computer, such as the amount of RAM and the size of the hard drive. • Change the system configuration information. • Set or change a user-selectable option, such as the user password
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 61
    POST), when the Dell logo appears, you can: • Access System Setup by pressing F2 key • Bring up the one-time boot menu by pressing F12 key The one-time boot menu the ownership date of the computer. Express Service Code Displays the express service code of the computer. Signed Firmware Update
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 62
    on board. SMART Reporting Enable or disable Self-Monitoring, Analysis, and Reporting Technology (SMART) during system startup. USB Configuration Enable Boot Support Enable or disable booting from USB mass storage devices such as external hard drive, optical drive, and USB drive. 62 System
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 63
    Touchscreen Enable or disable touchscreen (only for touchscreen computers). Miscellaneous Devices Enable or disable various onboard devices. Enable Camera Enable or disable the camera. Enable Secure Digital (SD) Card Enable or disable the SD card. Table 5. System setup options-Video menu
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 64
    On Time is set to Everyday, Weekdays, or Selected Days. Default: Disabled. Deep Sleep Control Enable or disable the Deep Sleep mode support. Default: Enabled USB Wake Support Wake on LAN?WLAN Enable the USB devices to wake the computer from Standby. Enable or disable the computer to be powered
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 65
    System setup options-Virtualization Support menu Virtualization Support Virtualization Specify whether a options-Maintenance menu Maintenance Service Tag Display the system's Service Tag. Asset Tag Create System Resolution Console and for the Dell OS Recovery tool. SupportAssist OS Recovery
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 66
    2. Remove the back cover. 3. Remove the bottom cover. 4. Remove the stand. 5. Remove the system-board shield. About this task The following image indicates the location of the CMOS jumper-pins and provides a visual representation of the removal procedure. Steps 1. Remove the jumper plug from the
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 67
    Steps 1. Remove the jumper plug from the password jumper-pins. 2. Wait for 5 seconds and then replace the jumper plug in its original location. Next steps 1. Install the system-board shield. 2. Install the stand. 3. Install the bottom cover. 4. Install the back cover. System setup 67
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 68
    completed successfully • View error messages that inform you of problems encountered during testing NOTE: Some tests for specific devices code and validation number and contact Dell. Display built-in self test About this task The following procedure provides the instructions on how to run the built-
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 69
    website to troubleshoot and fix your computer when it fails to boot into their primary operating system due to software or hardware failures. For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at www.dell.com/ support. Troubleshooting 69
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 70
    BIOS: Steps 1. Turn on your computer. 2. Go to www.dell.com/support. 3. Click Product support, enter the Service Tag of your computer, and then click Submit. NOTE: If you do not have the Service Tag, use the auto-detect feature or manually browse for your computer model. 4. Click Drivers & downloads
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 71
    after it has been powered off and the battery has been removed. The following procedure provides the instructions on how to conduct flea power release: Steps 1. Turn off your computer. 2. Disconnect the 4. Connect the power adapter to your computer. 5. Turn on your computer. Troubleshooting 71
  • Dell Inspiron 7790 AIO | Inspiron 27-7790 Service Manual - Page 72
    -help resources Self-help resources Information about Dell products and services Resource location www.dell.com My Dell app Tips Contact Support Online help for operating system Troubleshooting information, user manuals, set up instructions, product specifications, technical help blogs, drivers
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Inspiron 27-7790
Service Manual
Regulatory Model: W23C
Regulatory Type: W23C001
May 2020
Rev. A01