Dell Latitude 5420 Rugged Service Manual

Dell Latitude 5420 Rugged Manual

Get Dell Latitude 5420 Rugged PDF manuals and user guides View all Dell Latitude 5420 Rugged manuals
Add to My Manuals
Save this manual to your list of manuals

Dell Latitude 5420 Rugged manual content summary:

  • Dell Latitude 5420 Rugged | Service Manual - Page 1
    Dell Latitude 5420 Rugged Service Manual Regulatory Model: P85G Regulatory Type: P85G001
  • Dell Latitude 5420 Rugged | 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. © 2018 2019 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may
  • Dell Latitude 5420 Rugged | Service Manual - Page 3
    your computer...7 Safety instructions...7 Safety precautions...7 Electrostatic discharge-ESD protection...8 ESD field service kit ...8 Transporting -DC Adapters...16 90W...16 130W...17 LED and Cable...18 Battery...19 Battery Specifications...19 Processors...19 Skylake processor...20 Kaby Lake - 7th
  • Dell Latitude 5420 Rugged | Service Manual - Page 4
    memory ...44 Display...45 Troubleshooting Touchpad...48 Troubleshooting Your Pen...49 Realtek HD audio drivers...49 Camera features...50 Hard drive options...51 Dell Command Configure...57 Intel HD Graphics drivers...60 3 Removing and installing components 61 Safety instructions...61 Before working
  • Dell Latitude 5420 Rugged | Service Manual - Page 5
    modules...93 Removing the Memory...93 Installing the Memory...93 Coin-cell battery...94 Removing the Coin cell...94 Installing the Coin cell...95 PCIe Primary SSD rail...100 Docking Port Assembly...101 Removing the Docking port assembly...101 Installing the Docking Port Assembly...102 Heatsink
  • Dell Latitude 5420 Rugged | Service Manual - Page 6
    in Self Test ...153 Battery Status Lights...154 Diagnostic LED...154 Wi-Fi power cycle...155 BIOS recovery...155 BIOS recovery using hard drive...155 BIOS recovery using USB key...156 Self-Heal...156 Course Introduction...156 Self-Heal Instruction...157 Supported Latitude Models...157 5 Getting help
  • Dell Latitude 5420 Rugged | Service Manual - Page 7
    only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came
  • Dell Latitude 5420 Rugged | Service Manual - Page 8
    obvious, such as intermittent problems or a shortened product Dell products, the sensitivity to static damage is now higher than in previous Dell of damage to recognize and troubleshoot is the intermittent (also called is known as bonding. Use only Field Service kits with a wrist strap, mat, and
  • Dell Latitude 5420 Rugged | Service Manual - Page 9
    service technicians use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell stable base, and point your toes out. 2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load. 3. Lift with
  • Dell Latitude 5420 Rugged | Service Manual - Page 10
    Turn off your computer. 3. If the computer is connected to a docking device (docked), undock it. 4. Disconnect all network cables from the computer ( the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers. 1. Connect any
  • Dell Latitude 5420 Rugged | Service Manual - Page 11
    in the system. Topics: • Using your computer • AC-DC Adapters • Battery • Processors • Memory features • Graphics options • Corning Gorilla Glass • Pen USB Powershare • USB Type-C • Ethernet • HDMI 2.0 • Software and Troubleshooting Using your computer Open the LCD Lid Technology and components 11
  • Dell Latitude 5420 Rugged | Service Manual - Page 12
    Laptops are designed to allow LCD lid movement to a maximum of 180°, however lid should not be opened more than 140°, if the rear I/O ports are in use or when docked. Stealth mode Latitude rugged the computer. 2. Power on the computer and at the Dell logo, tap the F2 key repeatedly to bring up the
  • Dell Latitude 5420 Rugged | Service Manual - Page 13
    in the System Setup (BIOS). Customizing the backlit keyboard in System Setup (BIOS) 1. Turn off the computer. 2. Turn on the computer and when the Dell logo appears, press the F2 key repeatedly to bring up the System Setup menu. 3. Under System Configuration menu, select RGB Keyboard Backlight. You
  • Dell Latitude 5420 Rugged | Service Manual - Page 14
    is media key; Secondary behavior is F1-F12 key. • Fn Lock only switches primary and secondary behavior on F1-F12. • F7 is stealth -unique for rugged and semi rugged platforms. It turns off LCD, all wireless, all alerts, indicator lights, sound, fan, etc 14 Technology and components
  • Dell Latitude 5420 Rugged | Service Manual - Page 15
    Table 1. Keyboard shortcuts Hot keys Fn+ESC Fn+F1 Function Fn Lock Audio Volume Mute Fn+F2 Fn+F3 Fn+F4 Audio Volume Down/Decrease Audio Volume Up/Increase Microphone Mute Fn+F5 Fn+F6 Fn+F7 Fn+F8 Fn+F9 Fn+F10 Fn+F11 Fn+F12 Fn+PrintScreen Fn+Insert Num lock Scroll lock Stealth Mode LCD and
  • Dell Latitude 5420 Rugged | Service Manual - Page 16
    in BIOS? 1. Restart / Power on your computer. 2. At the first text on the screen or when the Dell logo appears, tap until the message Entering Setup appears. 3. Under General > Battery Information, you will see AC Adapter listed. 4. The status shows the wattage of the AC adapter connected. Any
  • Dell Latitude 5420 Rugged | Service Manual - Page 17
    130W Technology and components 17
  • Dell Latitude 5420 Rugged | Service Manual - Page 18
    LED and Cable 18 Technology and components
  • Dell Latitude 5420 Rugged | Service Manual - Page 19
    Dell Latitude Rugged use the following 3-cell battery options: • 3-cell 51 Whr (ExpressCharge) • 3-cell 51 Whr (Long-Life Cycle, includes 3 year limited warranty) The battery is located on the bottom of the system and is hot swap capable. This design is unlike any other Dell predecessors laptops
  • Dell Latitude 5420 Rugged | Service Manual - Page 20
    NOTE: The clock speed and performance varies depending on the workload and other variables. Skylake processor Intel Skylake is the successor to the Intel® Broadwell processor. It is a microarchitecture redesign using an already existing process technology and it will be branded as Intel 6th Gen Core
  • Dell Latitude 5420 Rugged | Service Manual - Page 21
    Built-In Visuals Yes OpenCL 2.0 Yes 14nm process Yes 16PCIe Graphic lanes No (configurable as 1x16 or 2x8 or 1x8+2x4) PCIe Gen3.0 support No Switchable graphics No (muxless solution) Memory Type DDR4 Connector / Memory Down Memory down Speed 2133MT/s for DDR4 Max Capacity 32 GB
  • Dell Latitude 5420 Rugged | Service Manual - Page 22
    W Memory type Graphics DDR4-2400 DDR4-2400 DDR4-2400 Intel HD graphics 620 Intel UHD graphics 620 Intel UHD graphics 620 Memory features This laptop supports 4-32 GB DDR4 SDRAM memory, up to 2400 MHz on KabyLake processors and 2133 MHz on SkyLake processors. DDR4 DDR4 (double data rate fourth
  • Dell Latitude 5420 Rugged | Service Manual - Page 23
    White failure code. If all memory fails, the LCD does not turn on. Troubleshoot for possible memory failure by trying known good memory modules in the memory connectors Integrated Integrated Integrated Discrete Capacity External display support Shared system HDMI 2.0 memory Shared system HDMI
  • Dell Latitude 5420 Rugged | Service Manual - Page 24
    15 inch) 2048x1152 @60 Hz For 3 displays : up to max resolution each above Numbers of Displays Supported • System Ports: 3 displays max with LCD plus 2 displays max on each output (HDMI, USB Type-C) • Docked: 3 displays max (combo of LCD, VGA, DP, HDMI) Intel UHD Graphics 620 Table 7. Intel UHD
  • Dell Latitude 5420 Rugged | Service Manual - Page 25
    SL-DVI) 1920x1080 @60 Hz • Analog: (VGA) system (14 inches/15 inches) 2048x1152 @60 Hz For 3 displays: • (native or docked) up to 1920x1200 max resolution each Numbers of Displays Supported • System Ports - 3 displays max with LCD plus 1 display max on each output (HDMI, VGA (14 inches/15 inches
  • Dell Latitude 5420 Rugged | Service Manual - Page 26
    Supported Intel HD Graphics 520 Intel UHD Graphics 620 (8th Generation Intel Core) • System Ports - 3 displays max with LCD plus 1 display max on each output (HDMI, VGA (14 inches/15 inches) • Docked TDP and is therefore suited for compact laptops and Ultrabooks. Key Specifications The following
  • Dell Latitude 5420 Rugged | Service Manual - Page 27
    Specification Features DirectX Max. Displays Supported DP 1.2/eDP 1.3 max. resolution HDMI max. resolution Intel HD/UHD in mobile processors specified at 15 W TDP and is therefore suited for compact laptops and Ultrabooks. Key Specifications The following table contains the key specifications of the
  • Dell Latitude 5420 Rugged | Service Manual - Page 28
    x16 Gen3 Memory Interface 64-bit Clock Speeds Up to 1124 MHz Estimated Maximum Power Consumption (TDP) 50W TGP (GPU + frame buffer) Display Support HDMI/mDP/eDP/USB-C Maximum Color Depth Maximum 4:4:4 Color Depth:12 (bits per pixel) Maximum Vertical Refresh Rate Up to 85 Hz depending on
  • Dell Latitude 5420 Rugged | Service Manual - Page 29
    Refresh Rate Operating Systems Graphics/ Video API Support Supported Resolutions and Max Refresh Rates (Hz) Numbers of Display Support AMD Radeon RX 540 Graphics Up to 395 cover for electronic displays in: • Smartphones • Laptop and tablet computer screens • Wearable devices • Touchscreen
  • Dell Latitude 5420 Rugged | Service Manual - Page 30
    Youngs Modulus Poissons Ratio Shear Modulus Vickers Hardness (200 g load) • Un-strengthened • Strengthened Fracture Toughness Coefficient of Expansion (0 ˚C - 300 ˚C) 76.7 GPa 0.21 31.7 GPa 489 kgf/mm2 596 kgf/mm2 596 kgf/mm2 0.69 MPa m0.5 78.8 x 10-7 /°C Chemical Strengthening Capability of >
  • Dell Latitude 5420 Rugged | Service Manual - Page 31
    use the pen the same way you use a mouse or touch pad with a laptop computer. Holding the pen near the display makes a small cursor appear. Moving the application window. Tablet PC Input Panel When an application does not directly support pen input, you can use the Tablet PC Input Panel to enter
  • Dell Latitude 5420 Rugged | Service Manual - Page 32
    You can move the Input Panel tab by dragging it up or down along the edge of the screen. Then, when you tap it, the Input Panel opens at the same horizontal location on the screen that the tab appears. Pen Flicks Pen flicks enable you to use the pen to perform actions that normally require a
  • Dell Latitude 5420 Rugged | Service Manual - Page 33
    Media Card Readers NOTE: The media card reader is integrated into the system board on portable systems. If there is a hardware failure or the reader malfunctions, replace the system board. The media card reader expands the usefulness and functionality of portable systems, especially when used with
  • Dell Latitude 5420 Rugged | Service Manual - Page 34
    . This technology is described in Software and Troubleshooting section. Systems management - From on-premises to the cloud Dell Client Command Suite - a free toolkit available for download, for all OptiPlex and Latitude PCs at https://dell.com/command, automates and streamlines systems management
  • Dell Latitude 5420 Rugged | Service Manual - Page 35
    Dell Command l Update Catalog provides searchable metadata that allows the management console to retrieve the latest systemspecific updates (driver most complete set of out-of-band management features including KVM, IPv6 support, graceful shutdown, and all the features from previous versions of vPro.
  • Dell Latitude 5420 Rugged | Service Manual - Page 36
    driver for the fingerprint reader is a software package from Dell ControlVault, that provides functionality for the device. Dell provides all support for the software, same as on the Latitude systems. Dell enroll fingerprints. An easy-to-follow wizard guides the user through the enrollment process.
  • Dell Latitude 5420 Rugged | Service Manual - Page 37
    3.1 Gen 1 products: • External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives • Portable USB 3.0/USB 3.1 Gen 1 Hard Drives • USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters • USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers • USB 3.0/USB 3.1 Gen 1 Solid-state Drives • USB 3.0/USB 3.1 Gen 1 RAIDs • Optical Media
  • Dell Latitude 5420 Rugged | Service Manual - Page 38
    that every device should be able to use. USB Type-C ports can support a variety of different protocols using "alternate modes," which allows you to have laptop charging cables, with everything charging via a standard USB connection. You could charge your laptop from one of those portable battery
  • Dell Latitude 5420 Rugged | Service Manual - Page 39
    of Gigabit Ethernet controllers provides compact, single-port integrated physical layer devices that connect to the Intel Skylake chipsets. The Intel WGI219LM supports the latest Ethernet security standard known as MACsec3 (IEEE standard 802.1ae). The Intel WGI219LM is the corporate LAN product with
  • Dell Latitude 5420 Rugged | Service Manual - Page 40
    Power • Ultra Low Power at cable disconnect (
  • Dell Latitude 5420 Rugged | Service Manual - Page 41
    , and confusion of multiple cables currently used in A/V systems • HDMI supports communication between the video source (such as a DVD player) and the DTV, enabling new functionality Software and Troubleshooting Chipsets All laptops or notebook communicate with the CPU through the chipset. This
  • Dell Latitude 5420 Rugged | Service Manual - Page 42
    Verify if the Intel chipset drivers are already installed in the laptop. Table 20. Intel chipset drivers Before installation After installation Downloading the chipset driver 1. Turn on the computer. 2. Go to Dell.com/support. 3. Click Product Support, enter the Service Tag of your computer, and
  • Dell Latitude 5420 Rugged | Service Manual - Page 43
    8. After the download is complete, navigate to the folder where you saved the driver file. 9. Double-click the chipset driver file icon and follow the instructions on the screen. Processor Identifying processors in Windows 10 1. Tap Search the Web and Windows. 2. Type Device Manager. 3. Tap
  • Dell Latitude 5420 Rugged | Service Manual - Page 44
    on or restart your system. 2. Perform one of the following actions after the Dell logo is displayed: • With keyboard press F12. • The system displays one time wait until you see the desktop. Turn off the laptop and try again. NOTE: ePSA can alternatively be launched by pressing and holding
  • Dell Latitude 5420 Rugged | Service Manual - Page 45
    1. Turn on the laptop. 2. Go to Dell.com/support. 3. Click Product Support, enter the Service Tag of your laptop, and then click Submit. NOTE: If you do not have the Service Tag, use the auto detect feature or manually browse for your laptop model. 4. Click Drivers and Downloads. 5. Select the
  • Dell Latitude 5420 Rugged | Service Manual - Page 46
    can also use the Brightness level slider to adjust the brightness manually. Changing the screen resolution 1. Press and hold the desktop Apply. Connecting to external display devices Follow these steps to connect your laptop to an external display device: 1. Ensure that the external display device
  • Dell Latitude 5420 Rugged | Service Manual - Page 47
    Clear the box to disable the touch screen. Touchscreen Troubleshooting If the touchscreen is not able to access items on the screen to correct the linearity problems. Touchscreen Sensitivity The touch screen may , all Windows 8 touch devices require supporting a minimum of five simultaneous touches.
  • Dell Latitude 5420 Rugged | Service Manual - Page 48
    Pointer Movement Here are some easy steps to take to determine the problem with a touch pad demonstrating erratic pointer movement: 1. Get the latest driver from Dell support site - Most problems can be corrected with a simple driver download. This should always be one of the first steps when
  • Dell Latitude 5420 Rugged | Service Manual - Page 49
    BIOS and driver from dell.com/support 3. Some problems can be caused by issues with the DirectX® API. Try downloading the latest version from Microsoft. 4. See if the problem occurs on both internal and external speakers. If isolated to only one of the two, follow the troubleshooting mentioned above
  • Dell Latitude 5420 Rugged | Service Manual - Page 50
    needs service. 4. If this issue is happening only on external speakers and the previous steps did not help, then examine the audio connector for damage. Test the system with Dell Diagnostics. If the problem persists there, then the audio connector needs to be replaced. Camera features This laptop
  • Dell Latitude 5420 Rugged | Service Manual - Page 51
    2. Select Camera from the apps list. 3. If the Camera App is not available in the apps list, search for it. Hard drive options This laptop supports M.2 SATA drives. Identifying the hard drive in Windows 10 1. Tap or click All Settings on the Windows 10 Charms Bar. Technology and components 51
  • Dell Latitude 5420 Rugged | Service Manual - Page 52
    drive is listed under Disk drives. 2. Expand Disk drives. Identifying the hard drive in the BIOS 1. Turn on or restart your system. 2. When the Dell logo appears, perform the following action to enter the BIOS setup program: • With keyboard - Tap F2 until the Entering BIOS setup message appears. To
  • Dell Latitude 5420 Rugged | Service Manual - Page 53
    improved through Native Command Queuing (NCQ). AHCI also delivers longer battery life with Link Power Management (LPM), which can reduce the power consumption of the chipset and Serial ATA (SATA) hard drive. Installation Instructions The Intel Rapid Storage Technology software can be install through
  • Dell Latitude 5420 Rugged | Service Manual - Page 54
    Create a RAID Array 1. Double-click "Intel Rapid Storage Technology" icon, then below main screen appears. 2. Click the "Create" icon to create a RAID array. Here we take RAID 1 for example. 3. In "Select Volume Type", click "Real-time data protection (RAID 1)". Click "Next". 4. In "Configure
  • Dell Latitude 5420 Rugged | Service Manual - Page 55
    5. In "Confirm Volume Creation", you may review the selected configuration. Then click "Create Volume". 6. The volume is created successfully. But you still need to partition your new volume by using Windows Desk
  • Dell Latitude 5420 Rugged | Service Manual - Page 56
    8. In Windows Desk Management, you need to initialize a disk before Logical Disk Management can access it. Click "OK". 9. Right-click on Disk 0, click "New Simple Volume". 10. Then follow the instructions on the New Simple Volume Wizard. 56 Technology and components
  • Dell Latitude 5420 Rugged | Service Manual - Page 57
    Hat Enterprise Linux environments. What's new with Dell Command | Configure The new features for the Dell Command | Configure includes: • Dell Client Configuration Toolkit (CCTK) is re-branded as Dell Command | Configure (DCC). • New User Interface. • Support for Red Hat Enterprise Linux 7.0 Client
  • Dell Latitude 5420 Rugged | Service Manual - Page 58
    • --keyboardbacklightonacpower • --rearusb • --sideusb • --unmanagednic Platforms Supported These are the business clients platforms supported: • Latitude™ • OptiPlex™ • Dell Precision Workstation Mobile • Dell Precision Workstation NOTE: Dell Command | Configure will not be pre-loaded for the
  • Dell Latitude 5420 Rugged | Service Manual - Page 59
    User's Guide Online Provides access to the Command | Configure online documentation. Launching The Command | Configure GUI NOTE: The Command | Configure GUI is supported only on systems running the Microsoft® Windows operating system. To launch the GUI, click Start > All Programs > Dell > Command
  • Dell Latitude 5420 Rugged | Service Manual - Page 60
    Command | Configure Installation Guide available at https://Dell.com/Command . 2. Boot the system that you want to configure from the CD. 3. Navigate to the Command Configure\x86 or Command Configure\x86_64 directory. 4. Run the Command | Configure commands. Intel HD Graphics drivers Verify if the
  • Dell Latitude 5420 Rugged | Service Manual - Page 61
    troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions docking device (docked),
  • Dell Latitude 5420 Rugged | Service Manual - Page 62
    AC power, and then remove the battery. • Disconnect all network cables, telephone accident. Standby Power Dell products with standby power is done through the use of a Field Service ESD kit. When connecting a bonding wire, be obvious, such as intermittent problems or a shortened product life
  • Dell Latitude 5420 Rugged | Service Manual - Page 63
    The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking -static container or packaging. The ESD Field Service Kit The unmonitored Field Service kit is the most commonly used. Each Field Service kit includes three main components: anti-static
  • Dell Latitude 5420 Rugged | Service Manual - Page 64
    physical connection of the wrist strap and bonding wire between your skin, the ESD mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone
  • Dell Latitude 5420 Rugged | Service Manual - Page 65
    ESD strap are prone to damage over time. When using an unmonitored kit, it is best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best method for doing this test. If you do not have your
  • Dell Latitude 5420 Rugged | Service Manual - Page 66
    part (plastic heat sink shroud) Acceptable - DIMM separated from the insulator part Consider the Working Environment Before deploying the ESD Field Service kit, assess the situation at the customer location. For example, deploying the kit for a server environment is different than for a desktop
  • Dell Latitude 5420 Rugged | Service Manual - Page 67
    service engineers use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when servicing Dell your knees. Do not bend at the waist. 3. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load. 4. Lift with
  • Dell Latitude 5420 Rugged | Service Manual - Page 68
    computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for other Dell computers. 1. Connect any wrench • A pair of tweezers NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4. Stylus Removing the stylus 1. Press
  • Dell Latitude 5420 Rugged | Service Manual - Page 69
    2. Withdraw the stylus out of the slot. Installing the stylus 1. Insert the stylus in the slot. Removing and installing components 69
  • Dell Latitude 5420 Rugged | Service Manual - Page 70
    2. Close the I/O door [1] and press the door until it latches [2]. SIM card Removing the SIM card 1. Remove the SIM card out of the slot on the system board. 70 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 71
    2. Close the right I/O door. 3. Follow the procedure in After working inside your computer. Installing the SIM card 1. Follow the procedure in Before working inside your computer. 2. Open the right I/O door. 3. Insert the SIM card into the slot on the system board. Removing and installing
  • Dell Latitude 5420 Rugged | Service Manual - Page 72
    Memory card Installing the memory card 1. Open the right I/O door. 2. Insert the memory card in the slot on the system board. Removing the memory card 1. Remove the memory card from the slot on the system board. 72 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 73
    2. Close the right I/O door. Handle Removing the Handle 1. Follow the procedure in Before working inside your computer. 2. Remove the two M3.5*7 screws [1] that secures the handle to the computer. 3. Separate the handle from the computer [2]. Removing and installing components 73
  • Dell Latitude 5420 Rugged | Service Manual - Page 74
    Installing the Handle 1. Install the handle on the computer [1]. 2. Tighten the two M3.5*7 screws [2] securing the handle to the computer. 3. Follow the procedure in After working inside your computer. 74 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 75
    Latch Doors Removing the latch doors 1. Follow the procedure in Before working inside your computer. 2. Open the I/O door. 3. Remove the screws [1] securing door hinges to the computer and lift the I/O door [2] away from the computer. Installing the latch doors 1. Install the door on the computer
  • Dell Latitude 5420 Rugged | Service Manual - Page 76
    on its location each door may have one, two, or three screws. Battery Removing the Battery 1. NOTE: This laptop can accommodate two hot-swap capable batteries(primary and optional), both the batteries follows the same installation and removal procedure. Follow the procedure in Before working
  • Dell Latitude 5420 Rugged | Service Manual - Page 77
    [2] to engage the latch mechanism and lock the battery [3]. 3. Follow the procedure in After working inside your computer. NOTE: This laptop can accommodate two hot-swap capable batteries(primary and optional), both the batteries follows the same installation and removal procedure. Removing and
  • Dell Latitude 5420 Rugged | Service Manual - Page 78
    : Attempt to retrieve the primary SSD carrier from an operational computer can cause operating system crash and potential data loss. 2. Remove the: Batteries. 3. Press the latch [1] and open the right I/O door [2]. 4. Release the SSD carrier by sliding the blue hard drive release latch [1] towards
  • Dell Latitude 5420 Rugged | Service Manual - Page 79
    Installing the Primary SSD carrier 1. Insert the primary SSD carrier in to the computer. 2. Push the carrier into the slot until the blue tab clicks. 3. Close the right I/O door [1] and press the door until the latch [2] clicks up in locking position. Removing and installing components 79
  • Dell Latitude 5420 Rugged | Service Manual - Page 80
    working inside your computer. SSD Removing the SSD from carrier 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries. b) SSD(Primary ). 3. Remove the two 'M2*5' screws [1] and flip over the SSD carrier [2]. 4. Remove the single 'M2*5' screw [3] and separate the
  • Dell Latitude 5420 Rugged | Service Manual - Page 81
    Flip over the SSD carrier [3] and tighten the two 'M2*5' screws [4] securing the cover to the SSD carrier. 5. Install the: a) SSD(Primary ). b) Batteries 6. Follow the procedure in After working inside your computer. Bottom Chassis Cover Removing the Bottom Chassis Cover 1. Follow the procedure in
  • Dell Latitude 5420 Rugged | Service Manual - Page 82
    4. Remove the 17 'M2.5*5' screws on the bottom chassis cover [1] and remove the bottom chassis cover [2] from the computer. Installing the Bottom Chassis Cover 1. Install the bottom chassis cover over the bottom base [1] of the computer. 2. Install the 17 'M2.5*5' screws on the bottom chassis cover
  • Dell Latitude 5420 Rugged | Service Manual - Page 83
    3. Tighten the two 'M2.5*6' screws [1] in the rear I/O space and close the rear and left I/O doors [2]. 4. Install the: a) Batteries 5. Follow the procedure in After working inside your computer. Removing and installing components 83
  • Dell Latitude 5420 Rugged | Service Manual - Page 84
    Keyboard Removing the Keyboard 1. Follow the procedure in Before working inside your computer. 2. Remove the: Batteries. 3. Remove the six 'M2.5*5' screws on the keyboard [1] and pry at the bottom edge of the keyboard [2]. 4. Slide the keyboard slightly [1] towards touch pad and
  • Dell Latitude 5420 Rugged | Service Manual - Page 85
    6. Peel-off the tape on the keyboard and back-light FPC [1] and disconnect it from the system board [2]. NOTE: Tweezers might be required to access the keyboard and back-light FPC connectors on the system board. 7. Separate the keyboard from the system [3]. Installing the Keyboard 1. Install the
  • Dell Latitude 5420 Rugged | Service Manual - Page 86
    3. Install the keyboard cover [1] and tighten the four 'M2*3' screws [2] to secure it to the chassis. 4. Flip the keyboard [3] over on the chassis [3]. 5. Slide the keyboard towards LCD [1] to align it to screw holes [2]. 86 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 87
    working inside your computer. WWAN card Removing the WWAN card 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover 3. Remove the single 'M2*3' screw [1], remove the metal bracket [2] on the WWAN card. Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 88
    4. Disconnect the antennae cables [3] and remove the WWAN card [4] out of the M.2 slot on the system board. Installing the WWAN card 1. Install the WWAN card in the M.2 slot [1] on the system board and connect the antennae cables [2]. 2. Secure the WWAN card using the metal bracket [3] and tighten
  • Dell Latitude 5420 Rugged | Service Manual - Page 89
    After working inside your computer. WLAN card Removing the WLAN card 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover 3. Remove the single 'M2*3' screw [1] and remove the metal bracket [2] on the WLAN card. 4. Disconnect the antennae
  • Dell Latitude 5420 Rugged | Service Manual - Page 90
    your computer. Global Positioning System (GPS) Removing the GPS module 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) Rear I/O board 3. Unroute the aux cables [1] for WLAN and WWAN and disconnect the antennae cable [2] on GPS
  • Dell Latitude 5420 Rugged | Service Manual - Page 91
    5. Peel off the inductive tape on the GPS FPC connector [1] and disconnect the GPS FPC connector [2] from GPS module. 6. Remove the two 'M2.5*5' screws [3] and separate the GPS module [4] from the system board. Installing the GPS module 1. Align and place the GPS module on the system board and
  • Dell Latitude 5420 Rugged | Service Manual - Page 92
    bracket [3]. 5. Connect the antennae cable [4] on GPS module and route the main antennae cables [5] through the RF bracket. 6. Install the: a) Rear I/O board b) Bottom Chassis Cover c) Batteries 7. Follow the procedure in After working inside your computer. 92 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 93
    Memory modules Removing the Memory 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover 3. Pull the clips securing the memory module [1] until the socket disengages and remove the memory module from the memory socket [2] on the
  • Dell Latitude 5420 Rugged | Service Manual - Page 94
    Removing the Coin cell 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Bottom chassis cover b) Batteries 3. NOTE: Removing or Disconnecting the coin cell may reset systemboard / BIOS / system time to defaults or engage bit locker or other similar security
  • Dell Latitude 5420 Rugged | Service Manual - Page 95
    Installing the Coin cell 1. Install the coin cell [1] and connect the coin cell connector to the system board [2]. 2. Install the: a) Bottom chassis cover b) Batteries 3. Follow the procedure in After working inside your computer. Removing and installing components 95
  • Dell Latitude 5420 Rugged | Service Manual - Page 96
    Heatsink Fan Assembly Removing the PCIe Heatsink fan assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover 3. Disconnect the fan cable [1], loosen the four 'M2*3' screws from fan case [2]. 4. Loosen the seven 'M2.5*5' screws
  • Dell Latitude 5420 Rugged | Service Manual - Page 97
    Installing the PCIe heatsink fan assembly 1. Replace the fan to th heatsink assembly [1] and secure it using four M2*3 screws [2] . Removing and installing components 97
  • Dell Latitude 5420 Rugged | Service Manual - Page 98
    2. Install the PCIe heatsink assembly [1] in the computer and install the seven 'M2.5*5' screws on heat sink pipe [2]. 3. Tighten the three 'M2*3' screws on the fan case [1] and connect the fan cable [2]. 98 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 99
    inside your computer. Primary SSD Rail Removing the Primary SSD rail 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) SSD c) Bottom chassis cover d) PCIe heatsink assembly 3. Peel off the inductive tape on the SSD FPC connector [1] on system board and
  • Dell Latitude 5420 Rugged | Service Manual - Page 100
    a piece of tape [3] and install the four 'M2*3' screws [4] securing it to the system board. 3. Install the: a) PCIe heatsink fan assembly b) Bottom chassis cover c) SSD d) Batteries 4. Follow the procedure in After working inside your computer. 100 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 101
    Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) PCIe Heatsink assembly 3. Peel off the tape securing the dock FPC [1] and disconnect the dock FPC [2]. 4. Disconnect the antennae cables from RF passthrough connectors [1] and unroute
  • Dell Latitude 5420 Rugged | Service Manual - Page 102
    the two 'M2.5*5' screws [1] and separate the docking board assembly from the chassis [2]. Installing the Docking Port Assembly 1. Install the docking port assembly [1] and install the two 'M2.5*5' screws [2] securing it to the system board. 2. Connect the dock FPC [1] and secure it using a piece of
  • Dell Latitude 5420 Rugged | Service Manual - Page 103
    along the routing channels [1] and connect the antennae cables on RF passthrough connectors [2]. 4. Install the: a) PCIe Heatsink assembly b) Batteries c) Bottom chassis cover 5. Follow the procedure in After working inside your computer. Heatsink Assembly Removing the Heatsink assembly 1. Follow
  • Dell Latitude 5420 Rugged | Service Manual - Page 104
    2. Remove the: a) Batteries b) Bottom chassis cover c) WLAN card d) WWAN card e) PCIe Heatsink fan assembly f) Docking port assembly 3. NOTE: Depending on the order configuration details the system may have either of the heatsink assembly. assembly Unroute the antennae cables from the
  • Dell Latitude 5420 Rugged | Service Manual - Page 105
    NOTE: Discreet and UMA bases have different types of heatsink assembly. Installing the Heatsink assembly 1. Install the heatsink assembly [1] in the computer and tighten the two 'M1.6*5' [2] cap screw near the CPU. 2. Install the five 'M2.5*5' captive screws [3] on the thermal module securing the
  • Dell Latitude 5420 Rugged | Service Manual - Page 106
    A 5 mm socket wrench should be used to remove/install the caps screws located in rear I/O space. 2. Remove the: a) Batteries b) WLAN card c) WWAN card d) PCIe heatsink fan assembly e) Docking port assembly f) Bottom chassis Cover 3. Loosen the two cap screws on the serial port in the rear I/O space
  • Dell Latitude 5420 Rugged | Service Manual - Page 107
    5. Loosen the three 'M2.5*5' screws [1] and lift the I/O board away from the system [2]. Installing the Rear I-O board 1. Install the rear I/O board on the system board and slide the serial port through the face plate [1]. 2. Secure the I/O board using three 'M2.5*5' screws [2]. Removing and
  • Dell Latitude 5420 Rugged | Service Manual - Page 108
    the rear I/O space. 4. Connect the I/O board FPC [2] to the system board and then to I/O board itself [3] and secure it using a piece of tape [3]. 5. Install the: a) Docking port assembly b) PCIe heatsink fan assembly c) WWAN card d) WLAN card 108 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 109
    working inside your computer. Hinge Covers Removing the Hinge Covers 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) Heatsink 3. Remove the two 'M2.5*5' on either sides [1] and lift to remove the brackets [2] from the computer
  • Dell Latitude 5420 Rugged | Service Manual - Page 110
    5. Hold the LCD lid at an obtuse angle and push the hinge covers from the rear end to remove it from the computer. Installing the Hinge Covers 1. Press the latch [1] and open the LCD lid [2]. 110 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 111
    2. Keep LCD lid open at an obtuse angle and insert the hinge covers from front until it clicks in its place. 3. Place the brackets[1] and secure it using two 'M2.5*5' on either sides [2]. Removing and installing components 111
  • Dell Latitude 5420 Rugged | Service Manual - Page 112
    assembly Removing the Display assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) PCIe heatsink assembly d) Docking port assembly e) WLAN card f) WWAN card g) GPS module h) Heatsink assembly i) Hinge covers 3. Remove the two
  • Dell Latitude 5420 Rugged | Service Manual - Page 113
    5. Open the LCD lid. 6. Loosen the two screws on hinges [1] and to separate the LCD assembly from the computer [2]. Removing and installing components 113
  • Dell Latitude 5420 Rugged | Service Manual - Page 114
    Installing the Display Assembly 1. Install the display assembly along the hinges at an obtuse angle [1] and install the two screws on left [2] and the right side [3]. 114 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 115
    2. Install the two 'M2*3' securing the hinges to base assembly [1] and rethread the antennae cables [2]. 3. Connect the EDP cable [3] to the system board and place the EDP bracket over the cable [4]. 4. Install the two 'M2*3' screws [5] and secure the EDP bracket to the system board. 5. Install the
  • Dell Latitude 5420 Rugged | Service Manual - Page 116
    back cover assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) WLAN card d) WWAN card e) PCIe heatsink assembly f) Docking port assembly g) Heatsink h) Hinge covers i) Display assembly 3. Loosen the 12 'M2.5' screws from the
  • Dell Latitude 5420 Rugged | Service Manual - Page 117
    5. Peel off the tape on the LCD connections [1] and open the connector [2] to disconnect the EDP cable [3] from the LCD. 6. Peel off the reflective tape [4] on the LCD panel and the touch connector [5] and disconnect the cable from the board [6]. Installing the LCD with bezel and the display back
  • Dell Latitude 5420 Rugged | Service Manual - Page 118
    4. Align and place the bezel on the back cover [1] and secure it using the four M2.5 epoxy screws [2]. 5. Install the 12 'M2.5' screws to secure the back cover to the LCD with bezel assembly. 118 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 119
    the Microphone 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) Memory d) WLAN card e) WWAN card f) PCIe heatsink assembly g) Docking port assembly h) Heatsink i) Hinge covers j) Display assembly. k) LCD bezel and back cover
  • Dell Latitude 5420 Rugged | Service Manual - Page 120
    4. Peel off the insulation tape [1] and disconnect the EDP cable connectors [2]. Installing the Microphone 1. Connect the EDP cable to the microphone daughterboard [1] and secure it using a piece of tape [2]. 120 Removing and installing components
  • Dell Latitude 5420 Rugged | Service Manual - Page 121
    tape on either sides [3] to the LCD back cover. 4. Install the: a) LCD with bezel assembly. b) Display assembly. c) Hinge covers d) Heatsink e) PCIe heatsink assembly f) Docking port assembly g) WWAN card h) WLAN card i) Bottom chassis cover j) Batteries Removing and installing components 121
  • Dell Latitude 5420 Rugged | Service Manual - Page 122
    the Camera 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) Memory d) WLAN card e) WWAN card f) PCIe heatsink assembly g) Docking port assembly h) Heatsink i) Hinge covers j) Display assembly. k) LCD Bezel and back cover assembly
  • Dell Latitude 5420 Rugged | Service Manual - Page 123
    assembly. c) Hinge covers d) Heatsink e) PCIe heatsink assembly f) Docking port assembly g) WWAN card h) WLAN card i) Bottom chassis cover j) Batteries 5. Follow the procedure in After working inside your computer. Battery Bay Removing the Battery bay 1. Follow the procedure in Before working
  • Dell Latitude 5420 Rugged | Service Manual - Page 124
    4. Remove the five 'M2.5*5' [1] and nine 'M2.5*3' [2] screws securing the battery bay to chassis and lift to separate the battery bay [3] from the computer. Installing the Battery bay 1. Install the battery bay [1] on the computer and tighten the five 'M2.5*5' [2] and nine 'M2.5*3' [3] securing it
  • Dell Latitude 5420 Rugged | Service Manual - Page 125
    cables to the system board. 3. Install the: a) PCIe Heatsink assembly b) Batteries c) Bottom chassis cover 4. Follow the procedure in After working inside your computer. Left I/O board Removing the Left I/O daughterboard 1. Follow the procedure in Before working inside
  • Dell Latitude 5420 Rugged | Service Manual - Page 126
    b) Bottom chassis cover c) PCIe Heatsink fan assembly d) Battery bay 3. Peel off the tape [1], disconnect the left I/O daughterboard FPC connector [2] from the system board. 4. Disconnect the speaker cable from the left I/O daughterboard [3]. 5. Loosen the
  • Dell Latitude 5420 Rugged | Service Manual - Page 127
    a piece of insulation tape [2]. 3. Connect the speaker cable to the left I/O daughterboard [3]. 4. Install the: a) Battery bay b) PCIe Heatsink fan assembly c) Bottom chassis cover d) Batteries 5. Follow the procedure in After working inside your computer. Removing and installing components 127
  • Dell Latitude 5420 Rugged | Service Manual - Page 128
    Smart Card Removing the Smart Card Reader 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) PCIe heatsink assembly d) Battery bay 3. Remove the tape from the smart card reader connector[1] and disconnect it [2] from the USH board.
  • Dell Latitude 5420 Rugged | Service Manual - Page 129
    6. Remove the tape [1] and disconnect the Smartcard Reader FPC connector [2] from the USH board. 7. Loosen the four 'M2*3' screws [1] and remove the smart card [2] reader from the computer. Removing and installing components 129
  • Dell Latitude 5420 Rugged | Service Manual - Page 130
    Installing the Smart Card Reader 1. Insert the smart card reader through the I/O face plate [1] and install the four 'M2*3' screws to secure it to the bottom chassis [2]. 2. Connect the Smart Card FPC on the underside of the USH board [1] and secure it using a piece of tape [2]. 130 Removing and
  • Dell Latitude 5420 Rugged | Service Manual - Page 131
    3. Install the two 'M2*3' screws [1] and turn over the USH board to secure it to the chassis [2]. 4. Connect the finger print reader connector [1] and secure it with a piece of tape [2]. 5. Connect the smart card reader connector [3] to the USH board and secure it using a piece of tape [4]. Removing
  • Dell Latitude 5420 Rugged | Service Manual - Page 132
    Speaker Removing the Speaker 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) PCIe heatsink assembly d) Left I/O daughterboard e) Battery bay 3. Remove the two 'M2.5*7' screws [1] and remove the speaker from the computer [2]. 132
  • Dell Latitude 5420 Rugged | Service Manual - Page 133
    the two 'M2.5*7' screws to secure the speaker to the base [2]. 2. Install the: a) Battery Bay b) Left I/O daughterboard c) PCIe Heatsink assembly d) Docking port assembly e) Bottom Chassis Cover f) Batteries 3. Follow the procedure in After working inside your computer. Removing and installing
  • Dell Latitude 5420 Rugged | Service Manual - Page 134
    as per order details. 1. Follow the procedure in Before working inside your computer. 2. Remove the: a) Batteries b) Bottom chassis cover c) Keyboard d) PCIe heatsink assembly e) Docking port assembly f) Primary SSD g) Heat Sink h) Memory i) WLAN card j) WWAN card k) GPS module l) Primary SSD
  • Dell Latitude 5420 Rugged | Service Manual - Page 135
    7. Peel off the tape [1] and disconnect the left I/O board FPC connector [2] from the system board. 8. Peel off the tape [1] and disconnect the power button cable [2]. 9. Peel off the tape [3] to disconnect the USH board and touch pad cable [4] from the system board. Removing and installing
  • Dell Latitude 5420 Rugged | Service Manual - Page 136
    10. Remove the two 'M2*3' screws [1] and remove the EDP bracket [2] from the system board. 11. Remove the EDP cable using the black pull tag [3] and disconnect the DC-in cable [4] from the system board. 12. Remove the two cap screws in the rear I/O space [1]. 13. Remove the two 'M2.5*5' screws and
  • Dell Latitude 5420 Rugged | Service Manual - Page 137
    14. Remove the eight 'M2.5*5' screws [1] and single 'M2*3' screw [2] on the system board and remove the system board from the chassis [3]. Installing the System board 1. Install the system board inserting the serial port on the system board through chassis [1] and install the eight 'M2.5*5' screws
  • Dell Latitude 5420 Rugged | Service Manual - Page 138
    screws on the serial port of the system board [1]. 3. NOTE: When installing the System Board, technicians must ensure that both the battery cables (1st & 2nd Battery) and FPC cables (Left I/O FPC and Express Card reader FPC) are not pinched under the System Board. Install the USB Type-C bracket
  • Dell Latitude 5420 Rugged | Service Manual - Page 139
    6. Connect the power button cable [1] and secure it using a piece of tape [2]. 7. Connect the USH board and touch pad cables [3] to the system board and secure it using a piece of tape [4]. 8. Connect the left I/O board FPC cable [1] and secure it using a piece of tape [2]. Removing and installing
  • Dell Latitude 5420 Rugged | Service Manual - Page 140
    9. Connect the rear I/O board FPC cable [1] and secure it using a piece of tape [2]. 10. Connect the battery indicator LED cable [3] and secure it using a piece of tape [4]. 11. Connect the dock FPC connector [5] and secure it using a piece of tape [6]. 12. Connect the touch pad connectors to the
  • Dell Latitude 5420 Rugged | Service Manual - Page 141
    bay c) Primary SSD rail d) GPS module e) WWAN card f) WLAN card g) Memory h) Heatsink i) Primary SSD j) Docking port assembly k) PCIe heatsink assembly l) Keyboard m) Bottom chassis cover n) Batteries 14. Follow the procedure in After working inside your computer. Bottom Base Assembly 1. Follow the
  • Dell Latitude 5420 Rugged | Service Manual - Page 142
    l) Memory m) Coin cell n) PCIe heatsink assembly o) Primary SSD rail p) Docking port assembly q) Heatsink assembly r) Rear I/O board s) Display assembly t) Primary SSD rail u) Battery bay v) Left I/O board w) Smart card x) Speaker y) System board 3. Reconnect the: • Power Button • Speakers • DC-In
  • Dell Latitude 5420 Rugged | Service Manual - Page 143
    p) q) r) s) 5. Follow the procedure in After working inside your computer. Removing and installing components 143
  • Dell Latitude 5420 Rugged | Service Manual - Page 144
    troubleshooting features to diagnose the Dell systems. It also lists the invoking instructions along with related information for each diagnostics method. Topics: • ePSA Diagnostics • LCD Built-in Self Test • Battery error messages that inform you of problems encountered during testing NOTE: The
  • Dell Latitude 5420 Rugged | Service Manual - Page 145
    ePSA Advanced Screen The advanced screen allows more directed testing and contains more detail information about the overall health of the system. The user can get to this screen by simply swiping your finger to the left on touchscreen systems or clicking the next page button on the lower right hand
  • Dell Latitude 5420 Rugged | Service Manual - Page 146
    the device from the left pane and click Run Tests or use Advanced Option to include or exclude any Test. ePSA Error Messages When the Dell ePSA Diagnostic detects an error while running, it will pause the test and then popup a window as shown below : 146 Diagnostics
  • Dell Latitude 5420 Rugged | Service Manual - Page 147
    the last test. Capture the error code with Validation code or Scan QR code and Contact Dell NOTE: As part of the new feature, user can now mute the beeping sound code when on Smart Phone. Online ePSA Validation Tool Usage Guide 1. User to obtain information from ePSA error windows. Diagnostics 147
  • Dell Latitude 5420 Rugged | Service Manual - Page 148
    2. Navigate to Online ePSA Validation Tool. 3. Enter error code, validation code, and service tag. Part serial number is optional. NOTE: For error code, use only the last 3 or 4 digits of the code. (user can enter 0142 or 142
  • Dell Latitude 5420 Rugged | Service Manual - Page 149
    Valid Error Code Example After entering the correct information, the online tools will direct user to above screen which contains information of : • Confirmation of the error code and result outcome. • Suggested Part Replacement. Diagnostics 149
  • Dell Latitude 5420 Rugged | Service Manual - Page 150
    • If customer is still covered under Dell Warranty. • Case reference number if there is an open case under the service tag . Invalid Error Code Example QR APP Validation Tool Besides using the online tool, customer can also validate the error code by scanning the QR
  • Dell Latitude 5420 Rugged | Service Manual - Page 151
    3. QR code scanner application will scan the code and automatically generate the link out. Click on the link to proceed. Diagnostics 151
  • Dell Latitude 5420 Rugged | Service Manual - Page 152
    navigate customer to Dell Support website which contains information of : • Confirmation of the error code and result outcome. • Suggested Part Replacement. • If customer is still covered under Dell Warranty. • Case reference number if there is an open case under the service tag. 152 Diagnostics
  • Dell Latitude 5420 Rugged | Service Manual - Page 153
    screen abnormality you are experiencing is an inherent problem with the LCD (screen) of the Dell laptop PC or with the video card (GPU LCD BIST Test 1. Power off the Dell laptop PC. 2. Disconnect any peripherals connected to the PC. Connect only the AC adapter (charger) to the PC. 3. Make sure that
  • Dell Latitude 5420 Rugged | Service Manual - Page 154
    off green light on An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop. Temporary battery failure with AC adapter present. Fatal battery failure with AC adapter present. Battery in full charge mode with AC adapter present. Battery in charge mode with AC adapter present
  • Dell Latitude 5420 Rugged | Service Manual - Page 155
    7 Problem Description following procedure provides the instructions on how to conduct a Wi-Fi power cycle: NOTE: Some ISPs (Internet Service Providers) provide a the previous version and the latest version of the BIOS from the Dell support site available to use. NOTE: Ensure that you have the file
  • Dell Latitude 5420 Rugged | Service Manual - Page 156
    system. NOTE: Ensure that you have downloaded the latest BIOS from the Dell support site and save it on your system. 1. Browse to the location of "\") and follow the on-screen instructions. Self-Heal Course Introduction Self-Heal is an option that helps recover a Dell Latitude system from a No Post,
  • Dell Latitude 5420 Rugged | Service Manual - Page 157
    the computer, follow the Safety Instructions. Supported Latitude Models NOTE: • Before replacing the system board, perform self-heal as a mandatory step. • Latitude Self-Heal can be avoided when complete system tear-down is required to access the coin-cell battery. • For the Latitude E7 Series (XX70
  • Dell Latitude 5420 Rugged | Service Manual - Page 158
    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. 2. Select your support category. 3. Verify your country or region in the Choose a Country
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
Dell Latitude 5420 Rugged
Service Manual
Regulatory Model: P85G
Regulatory Type: P85G001