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Dell OptiPlex Tower 7020 Owner's Manual
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Dell OptiPlex Tower 7020 Owner's Manual

Dell OptiPlex Tower 7020 Owner's Manual

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OptiPlex Tower 7020
Owner's Manual
Regulatory Model: D32M
Regulatory Type: D32M004
February 2024
Rev. A00

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Summary of Contents for Dell OptiPlex Tower 7020

  • Page 1 OptiPlex Tower 7020 Owner's Manual Regulatory Model: D32M Regulatory Type: D32M004 February 2024 Rev. A00...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2024 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: Table Of Contents

    Contents Chapter 1: Views of OptiPlex Tower 7020..................7 Front....................................... 7 Back......................................8 Chapter 2: Set up your OptiPlex Tower 7020................10 Chapter 3: Specifications of OptiPlex Tower 7020............... 16 Dimensions and weight..............................16 Processor..................................... 16 Chipset....................................17 Operating system................................17 Memory....................................17...
  • Page 4 Screw list.....................................32 Major components of OptiPlex Tower 7020.......................33 Chapter 5: Removing and installing side cover................35 Removing the side cover..............................35 Installing the side cover..............................36 Chapter 6: Removing and installing coin-cell battery..............39 Removing the coin-cell battery............................39 Installing the coin-cell battery............................39 Chapter 7: Removing and installing Customer Replaceable Units (CRUs)........41 Front bezel ..................................
  • Page 5 Deleting or changing an existing system setup password................135 Clearing CMOS settings..............................135 Clearing BIOS (System Setup) and System passwords..................136 Chapter 11: Troubleshooting.......................137 Dell SupportAssist Pre-boot System Performance Check diagnostics.............. 137 Running the SupportAssist Pre-Boot System Performance Check.............. 137 Power-Supply Unit Built-in Self-Test ........................137 System-diagnostic lights..............................137...
  • Page 6 Recovering the operating system..........................139 Real Time Clock—RTC reset............................139 Backup media and recovery options........................... 140 Wi-Fi power cycle................................140 Chapter 12: Getting help and contacting Dell................141 Contents...

  • Page 7: Chapter 1: Views Of Optiplex Tower 7020

    Views of OptiPlex Tower 7020 Front Figure 1. Front view 1. Slim optical drive (optional) Reads from and writes to CDs and DVDs. 2. Power button with diagnostic LED Press to turn on the system if it is turned off, in sleep state, or in hibernate state.

  • Page 8: Back

    1920x1200 at 60Hz. NOTE: The maximum resolution that is supported is up to 1920 x 1200 @ 60 Hz. 2. DisplayPort 1.4a port (HBR2 support) Connect an external display or a projector. Views of OptiPlex Tower 7020...
  • Page 9 Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access. 11. Service Tag label The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your system and access warranty information.

  • Page 10: Chapter 2: Set Up Your Optiplex Tower 7020

    Set up your OptiPlex Tower 7020 Steps 1. Connect the keyboard and mouse. Figure 3. Connect the keyboard and the mouse 2. Connect to your network using a cable, or connect to a wireless network. Set up your OptiPlex Tower 7020...
  • Page 11 Figure 4. Connect to your network using a cable, or connect to a wireless network 3. Connect the display. Set up your OptiPlex Tower 7020...
  • Page 12 Figure 5. Connect the display 4. Connect the power cable. Set up your OptiPlex Tower 7020...
  • Page 13 Figure 6. Connect the power cable 5. Press the power button. Set up your OptiPlex Tower 7020...
  • Page 14 Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu, search in the Knowledge Base Resource at www.dell.com/support. For Windows: Follow the on-screen instructions to complete the setup. When setting up, Dell Technologies recommends that you: ● Connect to a network for Windows updates. NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when prompted.
  • Page 15 This software delivers intelligent features that automatically fine-tune your computer for the best possible audio, power, and performance. Get the most out of your Dell device with intelligent, personalized technology from MyDell. Following are the key features of MyDell: ●...

  • Page 16: Chapter 3: Specifications Of Optiplex Tower 7020

    The weight of your computer depends on the ● Maximum: 6.37 kg (14.04 lb) configuration ordered and manufacturing variability. Processor The following table lists the details of the processors that are supported by your OptiPlex Tower 7020. Table 3. Processor  Description Option one...

  • Page 17: Chipset

    Graphics 710 Graphics 730 Graphics 770 Graphics 770 Graphics 730 Graphics 770 Chipset The following table lists the details of the chipset that is supported for your OptiPlex Tower 7020. Table 4. Chipset  Description Values Chipset Intel Q670 Processor Intel 300/14th Gen Intel Core i3/i5 vPro/12th Gen Intel Core...

  • Page 18: Memory Matrix

    ● 32 GB: 2 x 16 GB, DDR5, 5600 MT/s, UDIMM, dual- channel ● 64 GB: 2 x 32 GB, DDR5, 5600 MT/s, UDIMM, dual- channel Memory matrix The following table lists the memory configurations supported on your OptiPlex Tower 7020. Table 6. Memory matrix  Configuration Slot UDIMM1...

  • Page 19: External Ports

    Slot UDIMM1 UDIMM2 64 GB DDR5 32 GB 32 GB External ports The following table lists the external ports of your OptiPlex Tower 7020. Table 7. External ports  Description Values Network port One RJ45 Ethernet port 10/100/1000 Mbps USB ports ●...

  • Page 20: Internal Slots

    Expansion ● Two full-height Gen3 PCIe x1 slots ● One full-height Gen3 PCIe x16 slot Ethernet The following table lists the wired Ethernet Local Area Network (LAN) specifications of your OptiPlex Tower 7020. Table 9. Ethernet specifications  Description Values Model number...

  • Page 21: Audio

    NOTE: The version of the Bluetooth wireless card may vary depending on the operating system that is installed on your computer. Audio The following table lists the audio specifications of your OptiPlex Tower 7020. Table 11. Audio specifications  Description Values...

  • Page 22: Storage Matrix

    One M.2 2230/2280 solid-state drive (via PCIe Expansion Card) One 3.5-inch hard-disk drive Redundant Array of Independent Disks (RAID) For optimal performance when configuring drives as a RAID volume, Dell Technologies recommends drive models that are identical. NOTE: RAID is not supported on Intel Optane configurations.

  • Page 23: Power Ratings

    Storage -40°C to 70°C (-40°F to 158°F) -40°C to 70°C (-40°F to 158°F) Power supply connector The following table lists the Power supply connector specifications of your OptiPlex Tower 7020. Table 15. Power supply connector  Connector type Description 180 W internal power supply unit (PSU), 85% Efficient, 80 Plus ●...

  • Page 24: Video Port Resolution (Gpu-Integrated)

    ○ HDMI 2.1 port: Up to 4096 x 2160 @ 60 Hz ○ DisplayPort 1.4a (HBR3 support) port: Up to 5120 x 3200 @ 60 Hz ○ VGA port: Up to 1920 x 1200 @ 60 Hz Specifications of OptiPlex Tower 7020...

  • Page 25: External Display Support (Gpu-Integrated)

    NOTE: DisplayPort Multi-Stream Transport (MST) allows you to daisy chain monitors that have DisplayPort 1.2 and above ports and MST support. For more information about using DisplayPort Multi-Stream Transport, see www.dell.com/support. GPU—Discrete The following table lists the specifications of the discrete Graphics Processing Unit (GPU) supported by your OptiPlex Tower 7020.

  • Page 26: Hardware Security

    NOTE: DisplayPort Multi-Stream Transport (MST) allows you to daisy chain monitors that have DisplayPort 1.2 and above ports and MST support. For more information about using DisplayPort Multi-Stream Transport, see www.dell.com/support. Hardware security The following table lists the hardware security of your OptiPlex Tower 7020.

  • Page 27: Regulatory Compliance

    Product Safety, EMC and Environmental Datasheets Dell Regulatory Compliance Home Page Responsible Business Alliance policy Operating and storage environment This table lists the operating and storage specifications of your OptiPlex Tower 7020. Airborne contaminant level: G1 as defined by ISA-S71.04-1985 Table 25. Computer environment  Description...

  • Page 28: Chapter 4: 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 29: Safety Precautions

    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 30: Esd Field Service Kit

    Always place parts in your hand, on the ESD mat, in the computer, or inside an anti-static bag. ● 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. Working inside your computer...

  • Page 31: Transporting Sensitive Components

    It is recommended to always use the traditional wired ESD grounding wrist strap and protective anti-static mat when servicing Dell products. In addition, it is critical to keep sensitive parts separate from all insulator parts while performing service and use anti-static bags for transporting sensitive components.

  • Page 32: Screw List

    ● Phillips screwdriver #0 ● Phillips screwdriver #1 ● Plastic scribe Screw list NOTE: When removing screws from a component, it is recommended to note the screw type, and the quantity of screws, and then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is restored when the component is replaced.

  • Page 33: Major Components Of Optiplex Tower 7020

    Quantity Screw image #6-32 Major components of OptiPlex Tower 7020 The following image shows the major components of OptiPlex Tower 7020. Figure 8. Major Components of OptiPlex Tower 7020 1. Side cover 2. 3.5-inch hard drive 3. Slim optical drive 4.
  • Page 34 NOTE: Dell Technologies 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. Working inside your computer...

  • Page 35: Chapter 5: Removing And Installing Side Cover

    Removing and installing side cover Removing the side cover Prerequisites 1. Follow the procedure in Before working inside your computer. NOTE: Ensure that you remove the security cable from the security-cable slot, if applicable. About this task The following images indicate the location of the side cover and provide a visual representation of the removal procedure. Figure 9.

  • Page 36: Installing The Side Cover

    Figure 10. Removing the side cover Steps 1. Loosen the two thumbscrews (#6-32) that secure the side cover to the chassis. 2. Slide the side cover outwards, towards the rear of the computer, and lift the side cover away from the chassis. 3.
  • Page 37 Figure 11. Installing the side cover Figure 12. Installing the side cover Removing and installing side cover...
  • Page 38 Steps 1. Place the computer in the upright position. NOTE: This step applies only if you have installed any component other than the front bezel. 2. Align the tabs on the side cover with the slots on the chassis. 3. Slide the side cover towards the front of the chassis. 4.

  • Page 39: Chapter 6: Removing And Installing Coin-Cell Battery

    Removing and installing coin-cell battery Removing the coin-cell battery WARNING: This computer contains a coin-cell battery and requires trained technicians for handling guidance. CAUTION: Removing the coin-cell battery will clear the CMOS and will reset BIOS settings. Prerequisites 1. Follow the procedure in Before working inside your computer.
  • Page 40 Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the coin-cell battery and provide a visual representation of the installation procedure. Figure 14. Installing the coin-cell battery Steps With the positive side (+) facing up, insert the coin-cell battery into the battery socket (RTC) on the system board and snap the battery in place.

  • Page 41: Chapter 7: Removing And Installing Customer Replaceable Units (Crus)

    Removing and installing Customer Replaceable Units (CRUs) The replaceable components in this chapter are Customer Replaceable Units (CRUs). CAUTION: Customers can replace only the Customer Replaceable Units (CRUs) following the safety precautions and replacement procedures. NOTE: The images in this document may differ from your computer depending on the configuration you ordered. Front bezel Removing the front bezel Prerequisites...

  • Page 42: Installing The Front Bezel

    Figure 15. Removing the front bezel Steps 1. Using a plastic scribe, gently pry the tabs sequentially from the top and release the tabs on the front bezel. 2. Rotate the front bezel outward from the chassis and remove the front bezel. Installing the front bezel Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 43: Memory Module

    Figure 16. Installing the front bezel Steps 1. Align the tabs on the front bezel with the slots on the chassis. 2. Rotate the front bezel towards the chassis and snap it in place. Next steps 1. Install the side cover.

  • Page 44: Installing The Memory Module

    Figure 17. Removing the memory module Steps 1. Using your fingertips, carefully spread apart the securing-clips on each end of the memory-module slot (DIMM1 or DIMM2, whichever is applicable) . 2. Hold the memory module near the securing clips, and then gently ease the memory module out of the memory-module slot. CAUTION: To prevent damage to the memory module, hold the memory module by the edges.

  • Page 45: M.2 Solid State Drive

    Figure 18. Installing the memory module Steps 1. Ensure that the memory-module securing clips are in an open position. 2. Align the notch on the memory module with the tab on the memory-module slot (DIMM1 or DIMM2, whichever is applicable) . 3.
  • Page 46 2. Remove the side cover. About this task The following images indicate the location of the M.2 2230 solid-state drive and provide a visual representation of the removal procedure. Figure 19. Removing the M.2 2230 solid-state drive Steps 1. Remove the screw (M2x3.5) that secures the M.2 2230 solid-state drive to the M.2 card slot (M.2 PCIe SSD-0) on the system board.
  • Page 47 Figure 20. Installing the M.2 2230 solid-state drive Figure 21. Installing the M.2 2230 solid-state drive Steps 1. Remove the standoff nut (M2) from the M.2 slot (2280) and place it on the M.2 slot (2230), at half length, on the system board.

  • Page 48: M.2 2280 Solid-State Drive

    4. Replace the screw (M2x3.5) to secure the M.2 2230 solid-state drive to the system board. Next steps 1. Install the side cover. 2. Follow the procedure in After working inside your computer. M.2 2280 solid-state drive Removing the M.2 2280 solid-state drive Prerequisites 1.
  • Page 49 About this task The following images indicate the location of the M.2 2280 solid-state drive and provide a visual representation of the installation procedure. Figure 23. Installing the M.2 2230 solid-state drive Figure 24. Installing the M.2 2280 solid-state drive Steps 1.

  • Page 50: Dell Ultra Speed Drive Gen3 Card

    About this task The following images indicate the location of the Dell Ultra Speed Drive Gen3 card and provide a visual representation of the removal procedure. Figure 25. Removing the Dell Ultra Speed Drive Gen3 card Removing and installing Customer Replaceable Units (CRUs)
  • Page 51 Figure 26. Removing the Dell Ultra Speed Drive Gen3 card with M.2 2230 solid-state drive Removing and installing Customer Replaceable Units (CRUs)
  • Page 52 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Push and hold the tab that secures the Dell Ultra Speed Drive Gen3 card to the PCIe card connector (SLOT3) on the system board.
  • Page 53 If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the Dell Ultra Speed Drive Gen3 card and provide a visual representation of the installation procedure.
  • Page 54 Figure 29. Installing the Dell Ultra Speed Drive Gen3 card with M.2 2280 solid-state drive Removing and installing Customer Replaceable Units (CRUs)

  • Page 55: External Puck Antenna

    9. Gently press down on the Dell Ultra Speed Drive Gen3 card till the tab on the PCIe connector locks in place. 10. Close the PCIe door and press it gently until it clicks in place on the chassis, to secure the Dell Ultra Speed Drive Gen3 card.

  • Page 56: Wireless Card

    Wireless card Removing the wireless card Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. About this task The following images indicate the location of the wireless card and provide a visual representation of the removal procedure. Figure 31.

  • Page 57: Installing The Wireless Card

    Installing the wireless card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the wireless card and provide a visual representation of the installation procedure. Figure 32.

  • Page 58: Graphics Card

    3. Align the notch on the wireless card with the tab on the wireless-card slot (M.2 WLAN) on the system board. 4. Slide the wireless card at an angle into the wireless-card slot on the system board. 5. Replace the screw (M2x3.5) to secure the wireless-card to the system board. Next steps 1.

  • Page 59: Installing The Graphics Card

    Figure 33. Removing the graphics card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Push and hold the tab that secures the graphics card to the PCIe card connector (SLOT3) on the system board. 3.
  • Page 60 About this task The following images indicate the location of the graphics card and provide a visual representation of the installation procedure. Figure 34. Installing the graphics card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2.

  • Page 61: Hard Drive

    Hard drive 3.5-inch hard drive Removing the 3.5-inch hard drive Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the front bezel. About this task The following images indicate the location of the 3.5-inch hard drive and provide a visual representation of the removal procedure.
  • Page 62 Steps 1. Disconnect the data and power cables from the respective connectors on the hard drive. 2. Remove the four screws (#6-32) that secure the 3.5-inch hard drive to the chassis. 3. Remove 3.5-inch hard drive from the chassis. Installing the 3.5-inch hard drive Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.

  • Page 63: Optical Drive

    3. Connect the data and power cables to the respective connectors on the 3.5-inch hard drive. Next steps 1. Install the front bezel. 2. Install the side cover. 3. Follow the procedure in After working inside your computer. Optical drive Removing the slim optical drive Prerequisites 1.
  • Page 64 Figure 37. Removing the slim optical drive Figure 38. Removing the slim optical drive Removing and installing Customer Replaceable Units (CRUs)

  • Page 65: Installing The Slim Optical Drive

    Steps 1. Disconnect the data and power cables from the connectors on the slim optical drive. 2. Pull the securing tab to release the slim optical drive from the chassis. 3. Slide and remove the slim optical drive from the slot on the chassis. 4.

  • Page 66: Internal Speaker

    Figure 40. Installing the slim optical drive Steps 1. Insert the alignment pins on the slim optical-drive bracket in the slots on the optical drive. 2. Snap the slim optical-drive bracket in the slim optical drive. 3. Insert the slim optical drive in the slot on the chassis. 4.

  • Page 67: Installing The Internal Speaker

    Figure 41. Removing the internal speaker Steps 1. Remove the speaker cable from the retention clip. 2. Disconnect the speaker cable from the connector (INSKR1) on the system board. 3. Press the tab on the internal speaker, slide the internal speaker upwards, and lift the internal speaker along with the cable from the slot on the chassis.

  • Page 68: Expansion Card

    Figure 42. Installing the internal speaker Steps 1. Press the tab on the internal speaker, align and slide the internal speaker in the slot on the chassis until it snaps in place. NOTE: Ensure that the internal speaker is secured under the tabs on the chassis. 2.
  • Page 69 Figure 43. Removing the serial/parallel port card Figure 44. Removing the serial/parallel port card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. Removing and installing Customer Replaceable Units (CRUs)

  • Page 70: Installing The Serial/Parallel Port Card

    2. Push and hold the tab that secures the serial/parallel port card to the PCIe card connector (SLOT3) on the system board. 3. Gently lift the serial/parallel port card off the PCIe card connector on the system board. 4. Align and slide the PCIe blanking plate in the slot on the chassis. NOTE: Do not perform this step if you are immediately replacing the serial/parallel port card with a new PCIe card.

  • Page 71: Intrusion Switch

    Figure 46. Installing the serial/parallel port card Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Remove the PCIe blanking plate from the slot on the chassis. NOTE: Ensure to keep the PCIe blanking plate safe for future use. 3.

  • Page 72: Installing The Intrusion Switch

    Figure 47. Removing the intrusion switch Steps 1. Disconnect the intrusion-switch cable from the connector (INTRUSION) on the system board. 2. Remove the intrusion-switch cable from the retention clips on the chassis. 3. Slide the intrusion switch to the unlocked position and remove the intrusion switch from the chassis. Installing the intrusion switch Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
  • Page 73 Figure 48. Installing the intrusion switch Steps 1. Insert the intrusion switch in the slot on the chassis and slide the intrusion switch to the locked position to secure it to the chassis. 2. Route the intrusion-switch cable through the retention clips on the chassis. 3.

  • Page 74: Chapter 8: Removing And Installing Field Replaceable Units (Frus)

    To avoid any potential damage to the component or loss of data, ensure that an authorized service technician replaces the Field Replaceable Units (FRUs). CAUTION: Dell Technologies recommends that this set of repairs, if needed, to be conducted by trained technical repair specialists. CAUTION: As a reminder, your warranty does not cover damages that may occur during FRU repairs that are not authorized by Dell Technologies.

  • Page 75: Installing The Power Button

    Figure 49. Removing the power button Steps 1. Remove the two screws (#6-32) that secure the front I/O-bracket to the chassis. 2. Slide and remove the front I/O-bracket from the chassis. 3. Disconnect the power-button cable from the connector (PWR SW) on the system board. 4.
  • Page 76 Figure 50. Installing the power button Figure 51. Installing the power button Steps 1. Insert the power-button cable in the slot on the chassis from the front-side of the computer, and press the power-button head until it clicks into the place in the chassis. 2.

  • Page 77: Wireless Antenna Kit

    3. Align the tabs on the front I/O-bracket with the slots on the chassis. 4. Replace the two screws (#6-32) to secure the front I/O-bracket to the chassis. Next steps 1. Install the front bezel. 2. Install the side cover. 3.
  • Page 78 Figure 52. Removing the internal antenna module Removing and installing Field Replaceable Units (FRUs)
  • Page 79 Figure 53. Removing the internal antenna module Steps 1. Gently pull the internal-antenna cable out from the slot on the chassis. 2. Remove the internal-antenna cable from the routing guides on the chassis. 3. Remove the two screws (M3x3) that secure the internal antenna module to the chassis. 4.
  • Page 80 Figure 54. Installing the internal antenna module Removing and installing Field Replaceable Units (FRUs)

  • Page 81: External Sma Antenna Module

    Figure 55. Installing the internal antenna module Steps 1. Peel away the protective tape from the back of the internal antenna module. 2. Insert the tabs on the internal antennas in the slots on the chassis. Table 28. Antenna-cable color scheme  Chassis Label Antenna-cable color ANT-W...
  • Page 82 Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the external puck antenna. 4. Remove the wireless card. About this task NOTE: This step applies only to computers shipped with an optional external SMA antenna installed. The following images indicate the location of the external SMA antenna module and provide a visual representation of the removal procedure.
  • Page 83 Figure 57. Removing the external SMA antenna module Steps 1. Open the retention clip and remove the external SMA antenna-module cable from the retention clip on the chassis. 2. Lift the pull tab on the PCIe door outwards to open the PCIe door. 3.
  • Page 84 Figure 58. Installing the external SMA antenna module Figure 59. Installing the external SMA antenna module Steps 1. Using a screwdriver, remove the fixed PCIe blanking plate from the chassis. NOTE: This step is applicable only when the external SMA antenna module is being installed for the first time. Removing and installing Field Replaceable Units (FRUs)

  • Page 85: Fan Duct

    NOTE: To remove the fixed PCIe blanking plate, insert a flat-head screwdriver in the hole of the cover, push the blanking plate to release it, and then lift the blanking plate off the chassis. NOTE: Ensure to keep the PCIe blanking plate safe for future use. 2.

  • Page 86: Installing The Fan Duct

    Figure 60. Removing the fan duct Steps 1. Press the retention tabs on both sides of the fan duct to release it. 2. Pull the fan duct away from the back panel of the chassis. 3. Lift the fan duct off the system board. Installing the fan duct CAUTION: The information in this installation section is intended for authorized service technicians only.

  • Page 87: Processor Fan And Heat-Sink Assembly

    Figure 61. Installing the fan duct Steps 1. Press the retention tabs on both sides of the fan duct. 2. Align and place the fan duct in place on the system board. 3. Push the fan duct towards the back panel of the chassis until it clicks in place. Next steps 1.

  • Page 88: Installing The Processor Fan And Heat-Sink Assembly

    The following images indicate the location of the processor fan and heat-sink assembly and provide a visual representation of the removal procedure. Figure 62. Removing the processor fan and heat-sink assembly Steps 1. Disconnect the processor fan and heat-sink assembly cable from the connector (FAN CPU) on the system board. 2.

  • Page 89: Power-Supply Unit

    Figure 63. Installing the processor fan and heat-sink assembly Steps 1. Align the screw holes on the processor fan and heat-sink assembly with the screw holes on the system board. 2. Place the processor fan and heat-sink assembly on the processor. 3.
  • Page 90 4. Remove the 3.5-inch hard drive. About this task The following images indicate the location of the power-supply unit and provide a visual representation of the removal procedure. Figure 64. Removing the power-supply unit Removing and installing Field Replaceable Units (FRUs)

  • Page 91: Installing The Power-Supply Unit

    Figure 65. Removing the power-supply unit Steps 1. Disconnect the power-supply unit cables from the connectors (ATX CPU and ATX SYS) on the system board. 2. Remove the power-supply unit cables from the routing guides on the chassis. 3. Remove the three screws (#6-32) that secure the power-supply unit to the chassis. 4.
  • Page 92 Figure 66. Installing the power-supply unit Figure 67. Installing the power-supply unit Steps 1. Place the power-supply unit near the slot on the chassis and slide it towards the back of the chassis. Removing and installing Field Replaceable Units (FRUs)

  • Page 93: Processor

    2. Align the screw holes on the power-supply unit with the screw holes on the chassis. 3. Replace the three screws (#6-32) to secure the power-supply unit to the chassis. 4. Route the power-supply unit cables through the routing guides on the chassis. 5.

  • Page 94: Installing The Processor

    3. Gently remove the processor from the processor socket (CPU). CAUTION: When removing the processor, do not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket. Installing the processor CAUTION: The information in this installation section is intended for authorized service technicians only.

  • Page 95: Optional I/O Modules

    Optional I/O modules Optional serial module Removing the optional serial module CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover.
  • Page 96 About this task The following images indicate the location of the optional serial module and provide a visual representation of the installation procedure. Figure 71. Installing the optional serial module Steps 1. Using a screwdriver, remove the optional-module cover from the chassis. NOTE: This step is applicable only when the optional serial module is being installed for the first time.

  • Page 97: Optional Ps2 And Serial Module

    Optional PS2 and serial module Removing the optional PS2 and serial module Prerequisites 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover. 3. Remove the duct. About this task The following images indicate the location of the PS2 and serial module and provide a visual representation of the removal procedure.
  • Page 98 Figure 73. Removing the optional PS2 and serial module Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Disconnect the PS2 and serial module cable from the connector (KB MS SERIAL) on the system board. 3.
  • Page 99 Figure 74. Installing the optional PS2 and serial module Figure 75. Installing the optional PS2 and serial module Removing and installing Field Replaceable Units (FRUs)

  • Page 100: Optional Hdmi Module

    Steps 1. Lift the pull tab on the PCIe door outwards to open the PCIe door. 2. Remove the PCIe blanking plate from the slot on the chassis. NOTE: Ensure to keep the PCIe blanking plate safe for future use. 3.
  • Page 101 Steps 1. Remove the two screws (M3X3) that secure the optional HDMI module to the chassis. 2. Disconnect the optional HDMI-module cable from the connector (VIDEO) on the system board. 3. Lift the optional HDMI module off the system board. Installing the optional HDMI module CAUTION: The information in this installation section is intended for authorized service technicians only.

  • Page 102: Optional Displayport Module

    NOTE: To remove the optional-module cover, insert a flat-head screwdriver in the hole of the cover, push the cover to release it, and then lift the cover off the chassis. 2. Insert the optional HDMI module in the slot on the chassis. 3.
  • Page 103 3. Lift the optional DisplayPort module off the system board. Installing the optional DisplayPort module CAUTION: The information in this installation section is intended for authorized service technicians only. Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the optional DisplayPort module and provide a visual representation of the installation procedure.

  • Page 104: Optional Vga Module

    4. Replace the two screws (M3X3) to secure the optional DisplayPort module to the chassis. Next steps 1. Install the duct. 2. Install the side cover. 3. Follow the procedure in After working inside your computer. Optional VGA module Removing the optional VGA module CAUTION: The information in this removal section is intended for authorized service technicians only.
  • Page 105 Installing the optional VGA module CAUTION: The information in this installation section is intended for authorized service technicians only. Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The following images indicate the location of the optional VGA module and provide a visual representation of the installation procedure.

  • Page 106: System Board

    Next steps 1. Install the duct. 2. Install the side cover. 3. Follow the procedure in After working inside your computer. System board Removing the system board CAUTION: The information in this removal section is intended for authorized service technicians only. Prerequisites 1.
  • Page 107 Figure 82. System board connectors 1. Intrusion-switch cable connector (INTRUSION) 2. Power-supply unit cable connector (ATX CPU) 3. Processor fan and heat-sink assembly cable connector (FAN CPU) 4. Memory module connectors (DIMM1 and DIMM2) 5. Power-button cable connector (PWR SW) 6.
  • Page 108 Figure 83. Removing the system board Steps 1. Remove the two screws (#6-32) that secure the front I/O-bracket to the chassis. 2. Slide and remove the front I/O-bracket from the chassis. 3. Disconnect the following cables from the respective connectors on the system board and remove them from the retention clips on the chassis, if applicable: a.
  • Page 109 Figure 84. Removing the system board 4. Remove the eight screws (#6-32) that secure the system board to the chassis. 5. Remove the M.2 solid-state drive standoff nut (M2) that secures the system board to the chassis. Figure 85. Removing the system board Removing and installing Field Replaceable Units (FRUs)

  • Page 110: Installing The System Board

    6. Lift the pull tab on the PCIe door outwards to open the PCIe door. 7. Lift the system board at an angle and remove the system board from the chassis. Figure 86. Removing the system board Installing the system board CAUTION: The information in this installation section is intended for authorized service technicians only.
  • Page 111 Figure 87. System board connectors 1. Intrusion-switch cable connector (INTRUSION) 2. Power-supply unit cable connector (ATX CPU) 3. Processor fan and heat-sink assembly cable connector (FAN CPU) 4. Memory module connectors (DIMM1 and DIMM2) 5. Power-button cable connector (PWR SW) 6.
  • Page 112 Figure 88. Installing the system board Steps 1. Slide the front I/O-ports on the system board into the front I/O-slots on the chassis and align the screw holes on the system board with the screw holes on the chassis. 2. Replace the M.2 solid-state drive standoff nut (M2) to secure the system board to the chassis. 3.
  • Page 113 Figure 89. Installing the system board 4. Connect the following cables to the respective connectors on the system board and route them through the retention clips on the chassis, if applicable: a. Power-supply unit cables (ATX CPU and ATX SYS) b.
  • Page 114 Figure 90. Installing the system board 5. Close the PCIe door and press it gently until it clicks in place on the chassis. 6. Align the tabs on the front I/O-bracket with the slots on the chassis. 7. Replace the two screws (#6-32) to secure the front I/O-bracket to the chassis. Figure 91.
  • Page 115 8. Install the 3.5-inch hard drive. 9. Install the graphics card. 10. Install the wireless card. 11. Install the external puck antenna, if applicable. 12. Install the M.2 2230 solid-state drive or the M.2 2280 solid-state drive, whichever is applicable. 13.

  • Page 116: Chapter 9: Software

    ● Windows 11 Pro ● Windows 11 Pro National Education ● Ubuntu Linux 22.04 LTS Drivers and downloads When troubleshooting, downloading, or installing drivers, it is recommended that you read the Dell Knowledge Base article Drivers and Downloads FAQs 000123347. Software...

  • Page 117: Chapter 10: Bios Setup

    BIOS Setup CAUTION: Unless you are an expert computer user, do not change the settings in the BIOS Setup. Certain changes can make your computer work incorrectly. NOTE: Depending on the computer and its installed devices, the items that are listed in this section may or may not be displayed.

  • Page 118: System Setup Options

    Depending on your computer and its installed devices, the items that are listed in this section may or may not be displayed. Table 30. System setup options—Overview menu  Overview OptiPlex Tower 7020 BIOS Version Displays the BIOS version number. Service Tag Displays the Service Tag of the computer.
  • Page 119 The computer stops booting to the operating system when a component is not authenticated during the boot process. Secure Boot can be enabled in BIOS setup or using management interfaces like Dell Command|Configure, but can only be disabled from BIOS setup.
  • Page 120 By default, the Enable Microsoft UEFI CA option is enabled. For additional security, Dell Technologies recommends keeping the Microsoft UEFI CA option enabled to ensure the broadest compatibility with devices and operating systems.
  • Page 121 Table 32. System setup options—Integrated Devices menu (continued) Integrated Devices By default, the COM1: Port is configured at 3F8h with IBO4 option is selected. USB Configuration Enable Front USB Ports Enables the front USB ports. By default, the Enable Front USB Ports option is enabled. Enable Rear USB Ports Enables the rear USB ports.
  • Page 122 Table 34. System setup options—Display menu (continued) Display Primary Display Determines the primary display when multiple controllers are available on the computer By default, the Auto option is selected. Full Screen Logo Enables or disables the computer to display a full-screen logo, if the image matches screen resolution.
  • Page 123 Allows you to select whether or not the TPM is visible to the operating system. By default, the TPM 2.0 Security On option is enabled. For additional security, Dell Technologies recommends keeping TPM 2.0 Security On enabled to allow these security technologies to fully function.
  • Page 124 Table 37. System setup options—Security menu (continued) Security By default, the Key Storage Enable option is enabled. For additional security, Dell Technologies recommends keeping the Key Storage Enable option enabled. NOTE: When disabled, this feature may cause compatibility issues or loss of functionality in some operating systems.
  • Page 125 By default, the Start Data Wipe option is disabled. Absolute Absolute Software provides various cyber security solutions, some requiring software preloaded on Dell computers and integrated into the BIOS. To use these features, you must enable the Absolute BIOS setting and contact Absolute for configuration and activation.
  • Page 126 ● If the computer and hard drive passwords are set to the same value, the hard drive unlocks after the correct computer password is entered. Dell Technologies recommends using a hard drive password to protect unauthorized data access. Internal HDD-3 Password The Hard Drive Password can be set to prevent unauthorized access of the data stored on the hard drive.
  • Page 127 BIOS passwords. You can modify the minimum and maximum length of the passwords and require passwords to contain certain character classes (upper case, lower case, digit, special character). Dell Technologies recommends setting the minimum password length to at least eight characters. Upper Case Letter The Upper Case Letter field enforces stricter rules for administrator and system passwords.
  • Page 128 This gives an administrator control over the BIOS settings but enables an end user to provide their own password. By default, the Allow Non-Admin Password Changes option is enabled. For additional security, Dell Technologies recommends keeping the Allow Non- Admin Password Changes option disabled. Admin Setup Lockout...
  • Page 129 Allows you to control the automatic boot flow for SupportAssist System Resolution Console and for Dell operating system Recovery Tool. By default, the Dell Auto OS Recovery Threshold value is set to 2. Table 40. System setup options—System Management menu ...
  • Page 130 Table 40. System setup options—System Management menu (continued) System Management By default, the Restrict Preboot Access option is selected. SERR Messages Enable SERR Messages Enables or disables the SERR message mechanism. By default, the Enable SERR Messages option is enabled. First Power On Date Set Ownership Date Allows you to set the Ownership date of the computer.
  • Page 131 ● Intel Virtualization Technology - X ● Intel Virtualization Technology - Direct By default, the Intel Trusted Execution Technology (TXT) option is disabled. For additional security, Dell Technologies recommends keeping the Intel Trusted Execution Technology (TXT) option enabled. DMA Protection...

  • Page 132: Updating The Bios

    If the recovery key is not known this can result in data loss or an unnecessary operating system reinstall. For more information about this subject, search in the Knowledge Base Resource at www.dell.com/support. BIOS Setup...

  • Page 133: Updating The Bios In Linux And Ubuntu

    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 134: System And Setup Password

    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 135: Deleting Or Changing An Existing System Setup Password

    About this task To enter BIOS System Setup, press F2 immediately after a power-on or reboot. Steps 1. In the System BIOS or System Setup screen, select Security and press Enter. The Security screen is visible. 2. Select System/Admin Password and create a password in the Enter the new password field. Use the following guidelines to assign the system password: ●...

  • Page 136: Clearing Bios (System Setup) And System Passwords

    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 about how to reset Windows or application passwords, see the documentation accompanying Windows or your application.

  • Page 137: Chapter 11: Troubleshooting

    Check diagnostics About this task SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The Dell SupportAssist Pre-boot System Performance Check diagnostics is embedded with the BIOS and launched by the BIOS internally. The embedded system diagnostics provides options for particular devices or device groups allowing you to: ●...
  • Page 138 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. Table 47. Diagnostic-light LED codes ...

  • Page 139: Recovering The Operating System

    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 140: Backup Media And Recovery Options

    Backup media and recovery options It is recommended to create a recovery drive to troubleshoot and fix problems that may occur with Windows. Dell proposes multiple options for recovering the Windows operating system on your Dell computer. For more information, see...

  • Page 141: Chapter 12: 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 48. Self-help resources  Self-help resources Resource location Information about Dell products and services www.dell.com Tips Contact Support In Windows search, type Contact Support, and press Enter.

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