Dell Latitude 7280 Owner's Manual
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Dell Latitude 7280 Owner's Manual

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Dell Latitude 7280
Owner's Manual
Regulatory Model: P28S
Regulatory Type: P28S001
September 2021
Rev. A09

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Summary of Contents for Dell Latitude 7280

  • Page 1 Dell Latitude 7280 Owner's Manual Regulatory Model: P28S Regulatory Type: P28S001 September 2021 Rev. A09...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2017-2021 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 Chapter 1: Working on your computer....................7 Turning off your — Windows............................7 Turning off your computer — Windows 8........................7 Turning off your computer — Windows 7........................7 Before working inside your computer..........................8 Safety instructions................................8 After working inside your computer..........................9 Chapter 2: Disassembly and reassembly..................10 Screw size list..................................
  • Page 4 Installing power connector port..........................24 LED board....................................24 Removing LED board..............................24 Installing LED board..............................25 Smart card module................................25 Removing smart card cage............................25 Installing smart card cage............................27 Touchpad.....................................27 Removing touchpad buttons board.........................27 Installing touchpad buttons board...........................29 Display Assembly................................29 Removing display assembly............................29 Installing display assembly............................31 Touch display panel................................
  • Page 5 Clearing CMOS settings..............................69 Clearing BIOS (System Setup) and System passwords..................69 Chapter 5: Troubleshooting......................70 Handling swollen Lithium-ion batteries........................70 Dell SupportAssist Pre-boot System Performance Check diagnostics..............71 Running the SupportAssist Pre-Boot System Performance Check..............71 Built-in self-test (BIST)..............................71 M-BIST....................................71 LCD Power rail test (L-BIST)...........................
  • Page 6 Real Time Clock reset...............................74 Recovering the operating system..........................75 Backup media and recovery options..........................75 WiFi power cycle................................75 Drain residual flea power (perform hard reset)......................75 Chapter 6: Contacting Dell......................77 Contents...

  • Page 7: Chapter 1: Working On Your Computer

    Working on your computer Topics: • Turning off your — Windows • Turning off your computer — Windows 8 • Turning off your computer — Windows 7 • Before working inside your computer • Safety instructions • After working inside your computer Turning off your —...

  • Page 8: Before Working Inside Your Computer

    Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

  • Page 9: After Working Inside Your Computer

    CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers. 1. Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.

  • Page 10: Chapter 2: Disassembly And Reassembly

    • Keyboard assembly • Keyboard lattice and Keyboard • Palm rest Screw size list Table 1. Latitude 7280 - screw size list M2.5 x Component M2.5 x 6 M2 x 5 M2 x 3 M2.5 x 4 M2 x 2.5...

  • Page 11: Recommended Tools

    Table 1. Latitude 7280 - screw size list (continued) M2.5 x Component M2.5 x 6 M2 x 5 M2 x 3 M2.5 x 4 M2 x 2.5 M2 x 2 Power connector port ESD bracket EDP bracket Touchpad buttons Fingerprint reader...

  • Page 12: Replacing Sim Card

    Replacing SIM card NOTE: You can replace a SIM card only for those systems that are shipped with WWAN module. 1. Insert a paperclip or a SIM card removal tool into the pinhole on the SIM card tray. 2. Use a scribe to pull the SIM card tray. 3.
  • Page 13 CAUTION: Exercise caution when loosening the screws. Angle the screwdriver to match the head of the screw (front corners on the laptop base cover) to avoid a possible stripped screw head. 3. Lift the base cover from the computer. Disassembly and reassembly...

  • Page 14: Installing Base Cover

    ● 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 15: Installing Battery

    Installing battery 1. Insert the battery into the slot on the computer. 2. Route the battery cable through the routing clip and connect the battery cable to the connector on the system board. NOTE: Route the battery cable, if the cable at the base of the battery is un routed. 3.

  • Page 16: Installing Pcie Ssd

    Installing PCIe SSD 1. Insert the PCIe SSD card into the connector. 2. Install the SSD bracket over the PCIe SSD card. NOTE: When installing the SSD bracket, ensure that the tab on the bracket is held securely with the tab on the palm rest.
  • Page 17 a. Push to disconnect the speaker cable from the connector on the system board [1]. NOTE: Ensure to unroute the speaker cable from the routing clip. NOTE: Use a plastic scribe to release the cable from the connector. Do not pull the cable as it may result in breakage.

  • Page 18: Installing Speaker Module

    Installing speaker module 1. Place the speaker module into the slots on the computer. 2. Tighten the M2.0x3.0 screws to secure the speaker to the computer. 3. Route the speaker cable through the retention clips on the computer. 4. Connect the speaker cable to the connector on the system board. 5.

  • Page 19: Installing Coin Cell Battery

    Installing coin cell battery 1. Affix the coin cell battery on the slot inside the computer. 2. Route the coin cell battery cable through the routing channel before connecting the cable. 3. Connect the coin cell battery cable to the connector on the system board. 4.

  • Page 20: Installing Wwan Card

    Installing WWAN card 1. Insert the WWAN card into the connector on the system board. 2. Connect the WWAN cables to the connectors on the WWAN card. 3. Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer. 4.

  • Page 21: Installing Wlan Card

    Installing WLAN card 1. Insert the WLAN card into the connector on the system board. 2. Connect the WLAN cables to the connectors on the WLAN card. 3. Place the metal bracket and tighten the M2.0 x 3.0 screw to secure it to the computer. 4.

  • Page 22: Installing Memory Module

    Installing memory module 1. Insert the memory module into the connector until snaps in. 2. Connect the battery cable to the connector on the system board. 3. Install the base cover. 4. Follow the procedures in After working inside your computer.

  • Page 23: Installing Heat Sink Assembly

    NOTE: Remove the screws in the order of the callout numbers [1, 2, 3, 4] as indicated on the heat sink. c. Lift the heat sink assembly from the system board [3]. Installing heat sink assembly Heat sink assembly consists of heat sink and the system fan. 1.

  • Page 24: Installing Power Connector Port

    NOTE: Ensure to remove the adhesive tape that covers the connector. NOTE: Use a plastic scribe to release the cable from the connector. Do not pull the cable as it may result in breakage. b. Remove the M2.0x3.0 screw (1) to release the metal bracket on the power connector port [2]. c.

  • Page 25: Installing Led Board

    3. Disconnect the battery cable from the connector on the system board. 4. To remove the LED board: a. Disconnect the LED cable from the LED board [1]. CAUTION: Avoid pulling the cable as it would result in breaking the cable connector. Instead, use a scribe to release the LED cable from its connector.
  • Page 26 2. Remove the base cover. 3. Disconnect the battery cable from the connector on the system board. 4. Remove the PCIe SSD card 5. To disconnect the smart card cable: a. Disconnect the smart card cable [1]. NOTE: Ensure to gently push the connector, to avoid damage to the smart card head. b.

  • Page 27: Installing Smart Card Cage

    Installing smart card cage 1. Slide the smart card cage into the slot to align with the tabs on the computer. 2. Tighten the M2 x 3 screws to secure the smart card cage to the computer. 3. Affix the smart card cable and connect it to the connector on the computer . 4.
  • Page 28 NOTE: Un-route the speaker cable from the routing clips from the touchpad buttons. 6. To remove the touchpad buttons board: a. Disconnect the touchpad buttons board cable from the touchpad board [1]. NOTE: The touchpad buttons board cable is below the smart card cable. Ensure to lift the latch, to release the touchpad button board cable.

  • Page 29: Installing Touchpad Buttons Board

    Installing touchpad buttons board 1. Insert the touchpad buttons board into the slot to align the tabs with the grooves on the computer. 2. Tighten the M2.0 x 2.5 screws to secure the touchpad buttons board to the computer. 3. Connect the touchpad buttons board cable to the connector on the touchpad board. 4.
  • Page 30 a. Un route the WLAN and WWAN cables from the routing channels [1]. b. Remove the M2.0 x 5.0 screws that secure the eDP bracket [2]. c. Lift the eDP bracket from the eDP cable [3]. d. Lift the eDP cable to disconnect it from the connector on the system board [4]. e.

  • Page 31: Installing Display Assembly

    Installing display assembly 1. Place the base of the computer on a plane surface of a table and position it closer to the edge of the table. 2. Install the display assembly to align it with the display hinge holders on the system. 3.
  • Page 32 a. Use a plastic scribe to loosen the edges of the display panel. b. Flip the display screen over from the top. c. Peel the adhesive tape [1], Mylar shield [2]. d. Release the latch [3], and disconnect the eDP cable [4]. e.

  • Page 33: Installing Touch Display Panel

    8. Remove the display bezel from the display assembly. Installing touch display panel NOTE: The touch display panel installation procedure is applicable only for touch display configuration. 1. Place the display panel on the display assembly. 2. Reconnect the IR cable and eDP cable. 3.

  • Page 34: Installing Display Bezel (Nontouch)

    1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Disconnect the battery cable from the connector on the system board. 4. Remove the WLAN card. 5. Remove the WWAN card. 6. Remove the display assembly.
  • Page 35 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Disconnect the battery cable from the connector on the system board. 4. Remove the WLAN card. 5. Remove the WWAN card. 6. Remove the display assembly.
  • Page 36 f. Remove the display panel. Disassembly and reassembly...

  • Page 37: Installing The Display Panel (Nontouch)

    Installing the display panel (nontouch) NOTE: The display panel installation procedure is applicable only for nontouch display configuration. 1. Connect the display cable on the back of the display panel. 2. Affix the mylar tape securing the display cable on the back of the display panel. 3.

  • Page 38: Installing Camera

    Installing camera The installation procedure is applicable only for systems shipping with a nontouch display configuration. 1. Connect the camera cable. 2. Insert the camera microphone module into the slot on the display assembly. 3. Affix the tape to secure the camera module. 4.

  • Page 39: Display Hinge Caps

    Display Hinge Caps Removing the display hinge cap 1. Follow the procedure in Before working inside your computer. 2. Remove the base cover. 3. Disconnect the battery cable from the connector on the system board. 4. Remove the WLAN card. 5.
  • Page 40 If your computer is shipped with a WWAN card, then the removal of a blank SIM card tray is a requirement. 2. Remove the card. 3. Remove the base cover. 4. Disconnect the battery cable from the connector on the system board. 5.
  • Page 41 d. touchpad cable and USH board cable [4] e. power connector port cable [5] 12. To remove the system board: a. Disconnect the M2.0x3.0 screws that secure the system board to computer [1]. b. Lift the system board away from the computer. Disassembly and reassembly...
  • Page 42 13. Remove the M2.0x5.0 screws that secure the USB Type-C bracket. 14. Flip the system board, peel off the tapes securing the bracket and remove the USB Type-C port from the system board. Disassembly and reassembly...

  • Page 43: Installing System Board

    Installing system board 1. Place the USB Type-C port along with the bracket in the slot on the system board. 2. Affix the tape to secure the Type-C bracket. 3. Flip the system board and tighten the M2 x 3 screws to secure the USB type-C port to the system board. 4.
  • Page 44 5. Remove the PCIe SSD. 6. Remove the WLAN card. 7. Remove the WWAN card. 8. Remove the heat sink assembly. 9. Remove the system board. 10. Disconnect the cables from the palmrest end: a. touchpad and USH board cables [1] b.

  • Page 45: Installing Keyboard Assembly

    Installing keyboard assembly NOTE: The keyboard and the keyboard tray together are called the keyboard assembly. NOTE: The keyboard has multiple snap points on the lattice side which must be pushed down firmly at the snap points in order to secure and fit it to the replacement keyboard. 1.

  • Page 46: Keyboard Lattice And Keyboard

    Keyboard lattice and Keyboard Removing keyboard from keyboard tray 1. Follow the procedure in Before working inside your computer. 2. Remove the keyboard assembly 3. Remove the five M2.0 x 2.0 screws that secure the keyboard to the keyboard assembly. 4.
  • Page 47 2. Remove the: base cover battery memory module PCIe SSD WLAN card WWAN card power connector port heat sink assembly coin cell battery speaker display assembly system board keyboard The component that you are left with is the palm rest. 3.
  • Page 48 5. Follow the procedure in After working inside your computer. Disassembly and reassembly...

  • Page 49: Chapter 3: System Specifications

    Display specifications • Physical specifications • Environmental specifications Supported operating systems The topic lists the operating systems supported for Latitude 7280 system. Table 2. Supported operating systems Supported operating systems Description Windows 10 ● Microsoft Windows 10 Pro 64-bit ● Microsoft Windows 10 Home 64-bit Other ●...

  • Page 50: System Specifications

    System specifications Feature Specification Chipset Integrated in the processor DRAM bus width 64-bit Flash EPROM SPI 128 Mbits PCIe bus 100 MHz External Bus DMI 3.0—8GT/s Frequency Memory specifications Feature Specification Memory Integrated in the processor connector Memory capacity 4 GB and 16 GB Memory type DDR4 SDRAM-2133 MHz Minimum...

  • Page 51: Audio Specifications

    Audio specifications Feature Specification Types Four-channel high-definition audio Controller Realtek ALC3246 Stereo 24-bit—analog-to-digital and digital-to-analog conversion Internal interface High-definition audio External Microphone-in, stereo headphones, and headset combo connector interface Speakers Internal speaker 2 W (RMS) per channel amplifier Volume controls Hot keys Battery specifications Feature...

  • Page 52: Ac Adapter Specifications

    Operating Docking options NOTE: Docking stations are sold separately. Options ● Dell Dock WD15 ● Dell Dock Stand DS1000 ● Dell Thunderbolt Dock TB16 Port and connector specifications Table 5. Temperature specifications Feature Specifications Audio Microphone-in, stereo headphones, and headset combo...

  • Page 53: Communication Specifications

    Table 5. Temperature specifications (continued) Feature Specifications One USB 3.0One DisplayPort over USB Type-C (optional Thunderbolt 3) Memory card reader Micro Subscriber Identity Module (SIM) card Docking port Express Card None AC adapter E5 65 W E5 65 W rug (Only for India) E5 90 W E4 65 W HF (BFR/PVC Free) Power Companion 45 W (Dura Ace)

  • Page 54: Display Specifications

    Display specifications Feature Specification HD anti-glare Luminance 200 nits Height 155.52 mm (6.12 inches) Width 276.62 mm (10.89 inches) Diagonal 317.5 mm (12.5 inches) Maximum 1366 x 768 resolution Refresh rate 60 Hz/48 Hz Maximum +/-40° viewing angles— horizontal Maximum +10°/-30°...

  • Page 55: Physical Specifications

    Feature Specification Maximum +/-80° viewing angles— vertical Pixel pitch 0.1 44 x 0.144 Physical specifications Feature Specification Front height 11.51 mm (0.45 inch) Back height— 17.05 mm (0.71 inch) non-touch Back height— 17.3 mm (0.79 inch) touch Width 304.8 mm (12.0 inches) Depth 207.95 mm (8.19 inches) Weight—non-...

  • Page 56: Chapter 4: System Setup

    System Setup Topics: • BIOS overview • Entering BIOS setup program • Navigation keys • One time boot menu • System setup options • General screen options • System Configuration screen options • Video • Security screen options • Secure Boot screen options •...

  • Page 57: One Time Boot Menu

    Table 9. Navigation keys Keys Navigation Up arrow Moves to the previous field. Down arrow Moves to the next field. Enter Selects a value in the selected field (if applicable) or follow the link in the field. Spacebar Expands or collapses a drop-down list, if applicable. Moves to the next focus area.

  • Page 58: System Configuration Screen Options

    Option Description Battery Displays the battery status health and whether the AC adapter is installed. Information Boot Sequence Allows you to change the order in which the computer attempts to find an operating system. ● Diskette Drive ● Internal HDD ●...
  • Page 59 The options are: ● Enable USB Boot Support—enabled by default ● Enable the Thunderbolt ports—enabled by default ● Always Allow dell docks—enabled by default ● Enable External USB Port—enabled by default ● Enable Thunderbolt Boot Support ● Enable Thunderbolt (and PCIE behind TBT) Preboot ●...

  • Page 60: Video

    Option Description ● 30 sec ● 1 min ● 5 min ● 15 min ● Never Touchscreen It controls whether the screen is enabled or disabled. This option is enabled by default. Unobtrusive This option, when enabled, pressing Fn+F7 turns off all light and sound emissions in the system. To Mode resume normal operation, press Fn+F7 again.
  • Page 61 Option Description ● max-32—you can decrease the number Password Bypass Allows you to enable or disable the permission to bypass the System and the Internal HDD password, when they are set. The options are: ● Disabled ● Reboot bypass Default setting: Disabled Password Allows you to enable the disable permission to the System and Hard Drive passwords when the admin Change...

  • Page 62: Secure Boot Screen Options

    Secure Boot screen options Option Description Secure Boot This option enables or disables the Secure Boot feature. Enable ● Disabled ● Enabled Default setting: Enabled Expert Key Allows you to manipulate the security key databases only if the system is in Custom Mode. The Enable Management Custom Mode option is disabled by default.

  • Page 63: Power Management Screen Options

    Standby, the system setup removes power from all the USB ports to conserve battery power. ● Enable USB Wake Support ● Wake on Dell USB-C dock Default setting: The option is disabled. Wake on WLAN Allows you to enable or disable the feature that powers on the computer from the Off state when triggered by a LAN signal.

  • Page 64: Post Behavior Screen Options

    Battery Charge ● Adaptive—enabled by default Configuration ● Standard—Fully charges your battery at a standard rate. ● ExpressCharge—The battery charges over a shorter time using Dell’s fast charging technology This option is enabled by default. ● Primarily AC use ● Custom If Custom Charge is selected, you can also configure Custom Charge Start and Custom Charge Stop.

  • Page 65: Manageability

    Manageability Option Description USB provision Enable USB provision is not selected by default MEBX Hotkey Allows you to specify whether the MEBx Hotkey function should enable, during the system boot. —enabled by ● Disabled default ● Enabled Default setting: Disabled Virtualization support screen options Option Description...

  • Page 66: System Logs

    For more information on this subject, see Knowledge Article: https:// www.dell.com/support/article/sln153694 1. Go to www.dell.com/support. 2. Click Product support. In the Search support box, enter the Service Tag of your computer, and then click Search. NOTE: If you do not have the Service Tag, use the SupportAssist feature to automatically identify your computer.

  • Page 67: Updating The Bios Using The Usb Drive In Windows

    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 68: System And Setup Password

    6. Click Update BIOS. The computer restarts to flash the BIOS. 7. The computer will restart after the BIOS update is completed. System and setup password Table 10. System and setup password Password type Description System password Password that you must enter to log in to your system. Setup password Password that you must enter to access and make changes to the BIOS settings of your computer.

  • Page 69: Clearing Cmos Settings

    Clearing BIOS (System Setup) and System passwords 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 70: Chapter 5: Troubleshooting

    ● Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other computers with your computer.

  • Page 71: Dell Supportassist Pre-Boot System Performance Check Diagnostics

    Dell SupportAssist Pre-boot System Performance Check diagnostics 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 is launched by the BIOS internally.

  • Page 72: Lcd Power Rail Test (L-Bist)

    LCD Built-in Self Test (BIST) Dell laptops have a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with the LCD (screen) of the Dell laptop or with the video card (GPU) and PC settings.

  • Page 73: System-Diagnostic Lights

    System-diagnostic lights This section lists the system-diagnostic lights of your Latitude 7280. Table 12. System-diagnostic lights Blinking pattern Amber White Problem description Suggested resolution TPM detection failure Replace the system board. Unrecoverable SPI Flash Replace the system board. Failure EC unable to program i-Fuse Replace the system board.

  • Page 74: Real Time Clock Reset

    Real Time Clock reset The Real Time Clock (RTC) reset function allows you to recover your Dell system from No POST/No Boot/No Power situations. To initiate the RTC reset on the system make sure system is in a power-off state and is connected to power source .

  • Page 75: 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 76 5. Press and hold the power button for 20 seconds to drain the flea power. 6. Install the battery. 7. Install the base cover. 8. Connect the power adapter to your computer. 9. Turn on your computer. NOTE: For more information about performing a hard reset, see the knowledge base article 000130881 www.dell.com/support. Troubleshooting...

  • Page 77: Chapter 6: Contacting Dell

    Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues: 1. Go to Dell.com/support.

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