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Dell Precision 3431 Service Manual
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Dell Precision 3431 Service Manual

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Dell Precision 3431 Small Form Factor
Service Manual
Regulatory Model: D11S
Regulatory Type: D11S004

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Summary of Contents for Dell Precision 3431

  • Page 1 Dell Precision 3431 Small Form Factor Service Manual Regulatory Model: D11S Regulatory Type: D11S004...
  • Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2019 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

  • Page 3: Table Of Contents

    Contents 1 Working on your computer......................6 Safety instructions.................................6 Turning off your computer — Windows 10........................6 Before working inside your computer..........................7 After working inside your computer............................ 7 2 Technology and components......................8 Processor....................................8 DDR4....................................... 9 USB features..................................10 USB Type-C...................................11 HDMI 2.0....................................
  • Page 4 Heat sink and fan.................................43 Removing heat sink and heat sink fan........................43 Installing heat sink and heat sink fan...........................44 Intrusion switch..................................46 Removing intrusion switch............................46 Installing the intrusion switch............................46 Power switch..................................47 Removing power switch............................... 47 Installing the power switch............................48 Processor....................................49 Removing processor..............................49 Installing the processor..............................
  • Page 5 6 Getting help..........................96 Contacting Dell..................................96 A Dust Filter for Dell Precision 3431 Small Form Factor ..............97 B Installing the USB Type-C card....................99 C Installing the VGA card......................112 D Cable cover for Dell Precision 3431 Small Form Factor..............125...

  • Page 6: Working On 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 7: Before Working Inside Your Computer

    1. Click or tap 2. Click or tap and then click or tap Shut down. NOTE: Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds to turn them off.

  • Page 8: Technology And Components

    Technology and components This chapter details the technology and components available in the system. Topics: • Processor • DDR4 • USB features • USB Type-C • HDMI 2.0 • Advantages of DisplayPort over USB Type-C Processor NOTE: Processor numbers are not a measure of performance. Processor availability is subject to change and may vary by region/country.

  • Page 9: Ddr4

    DDR4 DDR4 (double data rate fourth generation) memory is a higher-speed successor to the DDR2 and DDR3 technologies and allows up to 512 GB in capacity, compared to the DDR3's maximum of 128 GB per DIMM. DDR4 synchronous dynamic random-access memory is keyed differently from both SDRAM and DDR to prevent the user from installing the wrong type of memory into the system.

  • Page 10: Usb Features

    Memory Errors Memory errors on the system display the new ON-FLASH-FLASH or ON-FLASH-ON 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 on the bottom of the system or under the keyboard, as in some portable systems.

  • Page 11: Usb Type-C

    With today's ever increasing demands placed on data transfers with high-definition video content, terabyte storage devices, high megapixel count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps theoretical maximum throughput, making data transfer at around 320 Mbps (40 MB/s) —...
  • Page 12 Alternate Mode USB Type-C is a new connector standard that is very small. It is about a third the size of an old USB Type-A plug. This is a single connector standard that every device should be able to use. USB Type-C ports can support a variety of different protocols using “alternate modes,”...

  • Page 13: Hdmi 2.0

    3. DisplayPort 1.4 – compatible with existing DisplayPort monitors, devices and cables 4. USB Power Delivery - Up to 130W on supported computers Key Features of Thunderbolt 3 over USB Type-C 1. Thunderbolt, USB, DisplayPort and power on USB Type-C on a single cable (features vary between different products) 2.

  • Page 14: Advantages Of Displayport Over Usb Type-C

    • HDMI combines video and multichannel audio into a single cable, eliminating the cost, complexity, 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 Advantages of DisplayPort over USB Type-C •...

  • Page 15: Major Components Of Your System

    Major components of your system 1. Side cover 2. Heatsink and fan Major components of your system...
  • Page 16 16. Graphics card NOTE: Dell 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.

  • Page 17: Removing And Installing Components

    Removing and Installing components Topics: • Recommended tools • Screw size list • Motherboard layout • Side cover • Expansion card • Coin cell battery • Hard drive assembly • Front Bezel • Hard drive and optical drive module • Optical drive •...

  • Page 18: Screw Size List

    Screw size list Table 4. Screw size list Component #6-32 #6.32x1.4 M3x6 M3x5 M3x3 M2x3.5 System board SSD card screw nut Hard disk drive caddy Power supply unit Front IO bracket SD card reader Type C/HDMI/DP module Internal antenna Wifi card SSD card Removing and Installing components...

  • Page 19: Motherboard Layout

    Motherboard layout 1. PCI-e x16 connector (slot 2) 2. PCI-e x4 connector (slot1—open ended x4 to support x16 3. USB Type-C connector 4. Video connector 5. Intrusion switch connector (Intruder) 6. CPU power connector (ATX_CPU) 7. Processor socket (CPU) 8. CPU fan connector 9.

  • Page 20: Installing The Side Cover

    Installing the side cover 1. Place the cover on the system and slide the cover until it clicks into place. 2. The release latch automatically locks the side cover to the system. Removing and Installing components...

  • Page 21: Expansion Card

    3. Follow the procedure in After working inside your computer Expansion card Removing expansion card 1. Follow the procedure in Before working inside your computer. 2. Remove the Side cover. 3. To remove the expansion card: a) Pull the metal tab to open the expansion card latch [1]. b) Pull the release tab at the base of the expansion card [2].

  • Page 22: Installing The Expansion Card

    Installing the expansion card 1. Insert the expansion card into the connector on the system board. 2. Press the expansion card until it clicks into place [1]. 3. Close the expansion card latch and press it until it clicks into place [2]. Removing and Installing components...

  • Page 23: Coin Cell Battery

    4. Install the Side cover. 5. Follow the procedure in After working inside your computer. Coin cell battery Removing coin cell battery 1. Follow the procedure in Before working inside your computer. 2. Remove the Side cover. 3. To remove the coin cell battery: a) Using a plastic scribe press the release latch until the coin cell battery pops out [1].

  • Page 24: Installing The Coin Cell Battery

    Installing the coin cell battery 1. Place the coin cell battery in its slot on the system board [1]. 2. Press the battery into the connector until it locks into place [2]. Removing and Installing components...

  • Page 25: Hard Drive Assembly

    3. Install the Side cover. 4. Follow the procedure in After working inside your computer. Hard drive assembly Removing the hard drive assembly 1. Follow the procedure in Before working inside your computer. 2. Remove the Side cover. 3. To remove the hard drive assembly: a) Disconnect the hard drive data cable and power cable from the connectors on the hard drive [1, 2].
  • Page 26 4. To remove the 2.5 inch hard drive from the assembly bracket: a) Pull one side of the hard drive bracket to disengage the pins on the bracket from the slots on the hard drive [1,2]. b) Lift the hard drive out of the hard drive bracket [3]. 5.

  • Page 27: Installing The Hard Drive Assembly

    Installing the hard drive assembly 1. To replace the 2.5 inch hard drive from the assembly bracket: a) Align the tabs on the hard drive with the slots on the hard drive assembly at a 30 degree angle [1]. b) Press the hard drive so that it gets secured to the hard drive assembly bracket [2]. 2.

  • Page 28: Front Bezel

    4. Install the Side cover. 5. Follow the procedure in After working inside your computer. Front Bezel Removing front bezel 1. Follow the procedure in Before working inside your computer. 2. Remove the Side cover. 3. To remove the front bezel: a) Pry the retention tabs to release the front bezel from the system [1] and pull to release the hooks on the front bezel from the front-panel slots [2].

  • Page 29: Installing Front Bezel

    Installing front bezel 1. Align the bezel and insert the retention tabs on the bezel into the slots on the system. 2. Press the bezel until the tabs clicks into place. 3. Install the Side cover. 4. Follow the procedure in After working inside your computer.

  • Page 30: Hard Drive And Optical Drive Module

    Hard drive and optical drive module Removing the hard drive and optical drive module 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel 3. To release the hard drive and optical drive module: a) Disconnect the hard drive data cable and power cable from the connectors on the hard drive [1, 2].
  • Page 31 4. To remove the hard drive and optical drive module: a) Disconnect the optical drive data cable and optical drive power cable from the connectors on the optical drive [1, 2]. b) Slide and lift the hard drive and optical drive module from the system [3]. Removing and Installing components...

  • Page 32: Installing The Hard Drive And Optical Drive Module

    Installing the hard drive and optical drive module 1. Insert the tabs on the hard drive and optical drive module into the slot on the system at a 30 degree angle [1]. 2. Connect the optical drive data cable and power cable to the connectors on the optical drive [2, 3]. 3.
  • Page 33 4. Route the optical drive data cable and power cable through the retention clips [1]. 5. Route the hard drive data and power cables through the HDD-ODD release tab [2]. Removing and Installing components...
  • Page 34 6. Slide the release tab to lock the module [1]. 7. Connect the hard drive data cable and power cable from the connectors on the hard drive [2, 3]. Removing and Installing components...

  • Page 35: Optical Drive

    8. Install the: Front bezel Side cover 9. Follow the procedure in After working inside your computer. Optical drive Removing the optical drive 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel 3.
  • Page 36 d) Disconnect the optical drive data cable and optical drive power cable from the connectors on the optical drive [1, 2] and lower the hard drive and optical module until it is seated [3]. Removing and Installing components...
  • Page 37 e) Press and push the release latch on the optical drive [1,2] and pull the optical drive out from the system [3]. Removing and Installing components...

  • Page 38: Installing The Optical Drive

    Installing the optical drive 1. Slide the optical drive into its slot in the system [1]. 2. Lift the hard drive and optical module [2]. Removing and Installing components...
  • Page 39 3. Connect the optical drive data cable and power cable to the connectors on the optical drive [1, 2]. 4. Place the hard drive and optical module back on the system [3]. Removing and Installing components...
  • Page 40 5. Connect the hard drive data cable and hard drive power cable to the connectors on the hard drive [1,2]. 6. Slide the release tab to lock the module [3,4]. Removing and Installing components...

  • Page 41: Memory Module

    7. Install the: Front bezel Side cover 8. Follow the procedure in After working inside your computer. Memory module Removing memory module 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module 3.

  • Page 42: Installing The Memory Module

    Installing the memory module 1. Align the notch on the memory module with the tab on the memory module connector. 2. Insert the memory module into the memory module socket [1]. 3. Press the memory module until the memory module retention tabs click into place [2]. Removing and Installing components...

  • Page 43: Heat Sink And Fan

    4. Install the: Hard drive and optical drive module Front bezel Side cover 5. Follow the procedure in After working inside your computer. Heat sink and fan Removing heat sink and heat sink fan 1. Follow the procedure in Before working inside your computer.

  • Page 44: Installing Heat Sink And Heat Sink Fan

    4. To remove the heat sink fan: a) Remove the four screws from the fan and lift the fan away from the heat sink. Installing heat sink and heat sink fan 1. To install the heat sink fan: a) Align and place the slots on the fan to the slots on the heat sink module. b) Replace the four screws to secure the heat sink fan to the heat sink.
  • Page 45 2. To replace the heat sink: a) Align the heat sink onto the processor [1]. b) Tighten the 4 captive screws to secure the heat sink assembly to the system board [2]. NOTE: Tighten the screws in a sequential order (1,2,3,4) as mentioned on the system board. c) Connect the heat sink fan cable to the slot on the system board [3].

  • Page 46: Intrusion Switch

    4. Follow the procedure in After working inside your computer. Intrusion switch Removing intrusion switch 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module Heat sink and heat sink fan 3.

  • Page 47: Power Switch

    3. Install the: Heat sink and heat sink fan Hard drive and optical drive module Front bezel Side cover 4. Follow the procedure in After working inside your computer. Power switch Removing power switch 1. Follow the procedure in Before working inside your computer.

  • Page 48: Installing The Power Switch

    Installing the power switch 1. Slide the power switch module into the slot on the chassis until it clicks into place [1]. 2. Connect the power switch cable to the connector on the system board [2]. Removing and Installing components...

  • Page 49: Processor

    3. Install the: Hard drive and optical drive module Front bezel Side cover 4. Follow the procedure in After working inside your computer. Processor Removing processor 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module Heat sink and heat sink fan...

  • Page 50: Installing The Processor

    Installing the processor 1. Place the processor on the socket such that the slots on the processor align with the socket keys [1]. 2. Close the processor shield by sliding it under the retention screw [2]. 3. Lower the socket lever and push it under the tab to lock it [3]. Removing and Installing components...

  • Page 51: M.2 Pcie Solid State Drive -Ssd

    4. Install the: Heat sink and heat sink fan Hard drive and optical drive module Front bezel Side cover 5. Follow the procedure in After working inside your computer. M.2 PCIe Solid State Drive -SSD Removing the M.2 PCIe Solid State Drive -SSD 1.

  • Page 52: Installing The M.2 Pcie Solid State Drive -Ssd

    NOTE: M.2 PCIe SSD with capacity over 512G(512G/1TB/2TB) must be installed with a thermal pad. M.2 SATA SSD and M.2 PCIe SSD with 128G and 256G does not require a thermal pad. Installing the M.2 PCIe Solid State Drive -SSD 1.

  • Page 53: Intel Optane Card

    4. Install the: Hard drive and optical drive module Front bezel Side cover 5. Follow the procedure in After working inside your computer. Intel Optane card Removing the Intel Optane card 1. Follow the procedure in Before working inside your computer.

  • Page 54: Installing The Intel Optane Card

    Installing the Intel Optane card 1. Place the thermal pad into the slot on the system board [1]. 2. Insert the Intel Optane card into the card slot on the system board [2]. 3. Replace the single (M2 x 3.5) screw that secures the Intel Optane card to the system board [3]. NOTE: Intel Optane modules must be installed with a thermal pad.

  • Page 55: Sd Card Reader - Optional

    4. Install the: Hard drive and optical drive module Front bezel Side cover 5. Follow the procedure in After working inside your computer. SD card reader - optional Removing the SD card reader 1. Follow the procedure in Before working inside your computer.

  • Page 56: Installing The Sd Card Reader

    c) Lift the SD card reader from the slot on the system board [3]. Installing the SD card reader 1. Route the power cables back through the retention clip on the SD card reader [1]. 2. Insert the SD card reader from the slot on the system board [2]. 3.

  • Page 57: Internal Antenna - Optional

    4. Install the: Hard drive and optical drive module Front bezel Side cover 5. Follow the procedure in After working inside your computer. Internal Antenna - optional Removing the Internal Antenna 1. Follow the procedure in Before working inside your computer.
  • Page 58 c) Remove the single screw that secures the antenna to the chassis [1]. d) Remove the black antenna cable from the ANT-B slot on the chassis [2,3]. Removing and Installing components...
  • Page 59 e) Remove the single screw that secures the antenna to the chassis [1]. f) Remove the white antenna cable from the ANT-W slot on the chassis [2,3]. Removing and Installing components...

  • Page 60: Installing The Internal Antenna

    Installing the Internal Antenna 1. Peel off the mylar tape from internal antenna. Removing and Installing components...
  • Page 61 2. To install the antenna on the system: a) Align and insert the white antenna cable into the ANT-W slot on the chassis [1,2] b) Replace the single screw to secure the antenna to the chassis [3]. Removing and Installing components...
  • Page 62 c) Align and insert the black antenna cable into the ANT-B slot on the chassis [1,2]. d) Replace the single screw to secure the antenna to the chassis [3]. Removing and Installing components...
  • Page 63 e) Route the antenna cable across the two hooks [1]. f) Route the antenna cable through the cable hole on the chassis [2]. Removing and Installing components...
  • Page 64 g) Remove the plastic tube from internal antenna cable. Removing and Installing components...

  • Page 65: External Antenna - Optional

    3. Install the: Hard drive and optical drive module Front bezel Side cover 4. Follow the procedure in After working inside your computer. External Antenna - optional Removing the External Antenna 1. Follow the procedure in Before working inside your computer.
  • Page 66 b) Unroute the antenna cable from the retention clip on the chassis [1]. c) Remove the retention clip from the chassis[2]. Removing and Installing components...
  • Page 67 d) Disconnect the antenna connectors from the connectors on the WLAN card. e) Remove the nuts to secure the antenna connectors to the chassis [1]. f) Remove the metal washers on to the antenna connectors [2]. g) Remove the antenna cables from the antenna slot on the chassis [3]. Removing and Installing components...

  • Page 68: Installing The External Antenna

    Installing the External Antenna 1. External antenna. Removing and Installing components...
  • Page 69 2. To install the antenna on the system: a) Remove the caps from the antenna cable [1]. b) Loosen and remove the nut [2]. c) Remove the metallic washer [3]. d) Push the blank filler with a screw driver. Removing and Installing components...
  • Page 70 e) Insert the antenna cables into the antenna slot on the chassis [1]. f) Replace the metal washers on to the antenna connectors [2]. g) Replace the nuts to secure the antenna connectors to the chassis [3]. Removing and Installing components...
  • Page 71 h) Affix the retention clip on the chassis as show in the image [1]. i) Route the antenna cable through the retention clip [2]. j) Pull off the insulation on the antenna cable connectors [3]. Removing and Installing components...
  • Page 72 k) Connect the antenna connectors to the connectors on the WLAN card. l) Tighten the antenna to the antenna cable connector screws. Removing and Installing components...

  • Page 73: M.2 2230 Wlan Card - Optional

    3. Install the: Hard drive and optical drive module Front bezel Side cover 4. Follow the procedure in After working inside your computer. M.2 2230 WLAN card - optional Removing the M.2 2230 WLAN card 1. Follow the procedure in Before working inside your computer.

  • Page 74: Installing The M.2 2230 Wlan Card

    Installing the M.2 2230 WLAN card 1. To install the M.2 2230 WLAN card: a) Align and replace the WLAN card into the WLAN card slot [1]. b) Connect the antenna cables to the WLAN card [2]. c) Replace the WLAN card bracket on the WLAN card [3]. d) Replace the screw (M2) that secures the WLAN card bracket and the WLAN to the system board [4].

  • Page 75: Power Supply Unit

    2. Install the: Hard drive and optical drive module Front bezel Side cover 3. Follow the procedure in After working inside your computer. Power supply unit Removing power supply unit or PSU 1. Follow the procedure in Before working inside your computer.
  • Page 76 4. To remove the PSU: a) Remove the 3 screws that secure the PSU to the system [1]. b) Press the blue release tab [4] at the rear end of the PSU unit, slide the PSU and lift it away from the system [2]. Removing and Installing components...

  • Page 77: Installing The Power Supply Unit Or Psu

    Installing the power supply unit or PSU 1. Insert the PSU in the chassis and slide it towards the back of the system to secure it [1]. 2. Replace the screws to secure the PSU to the rear chassis of the system . Removing and Installing components...
  • Page 78 3. Connect the power cable to the connector on the system board [1]. 4. Route the system power cable through the retention clips [2]. 5. Route the CPU power cable through the retention clips [3]. 6. Connect the CPU power cable to the connector on the system board [4]. Removing and Installing components...

  • Page 79: Speaker

    7. Install the: Hard drive and optical drive module Front bezel Side cover 8. Follow the procedure in After working inside your computer. Speaker Removing speaker 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module 3.

  • Page 80: Installing The Speaker

    Installing the speaker 1. Insert the speaker into the slot on the system chassis and press it until it clicks into place [1]. 2. Connect the speaker cable to the connector on the system board [2]. Removing and Installing components...

  • Page 81: System Fan

    3. Install the: Hard drive and optical drive module Front bezel Side cover 4. Follow the procedure in After working inside your computer. System fan Removing the system fan 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module...

  • Page 82: Installing The System Fan

    Installing the system fan 1. To replace the system fan: a) Align and place the system fan in the system chassis [1]. b) Pass the grommets through the chassis and slide outward along the groove to secure it in place [2,3]. c) Connect the system fan cable to the system board [4].

  • Page 83: System Board

    2. Install the: Hard drive and optical drive module Front bezel Side cover 3. Follow the procedure in After working inside your computer. System board Removing system board 1. Follow the procedure in Before working inside your computer. 2. Remove the: Side cover Front bezel Hard drive and optical drive module...
  • Page 84 c) Disconnect the power switch cable [3], unroute the power cable from the retention clips on the chassis [4], psu cable [5] and, intrusion switch cable [6] from the connectors on the system board. 4. Disconnect the intrusion switch cable [1], PSU power cable [2], data cable [3], system fan cable [4], SATA cable [5], SATA power cable [6] Removing and Installing components...
  • Page 85 5. To remove the screws from the system board: a) Remove the standoff single (#6-32) screw and single (M3x6) caddy screw that secures the system board to the system [1,2]. b) Remove the 5 screws that secure the system board to the chassis [3]. Removing and Installing components...
  • Page 86 6. To remove the system board: a) Lift and slide the system board away from the system [1, 2]. Removing and Installing components...

  • Page 87: Installing The System Board

    Installing the system board 1. Hold the system board by its edges, and align it towards the back of the system. 2. Lower the system board into the system chassis until the connectors at the back of the system board align with the slots on the chassis, and the screw holes on the system board align with the standoffs on the system chassis [1,2].
  • Page 88 4. Align the cables with the pins on connectors on the system board and connect intrusion switch cable [1], PSU power cable [2], data cable [3], system fan cable [4], SATA cable [5], SATA power cable [6] to the system board: Removing and Installing components...
  • Page 89 5. Insert the hook on the I/O panel into the slot on the chassis and rotate to close the I/O panel [1]. 6. Replace the screw to secure the I/O panel to the chassis [2]. 7. Connect the power switch cable [3], route the power cable through the retention clips on the chassis [4], psu cable [5] and, intrusion switch cable [6] from the connectors on the system board.

  • Page 90: Troubleshooting Your Computer

    Invoke diagnostics boot by either of the methods that are suggested below: 1. Power on the computer. 2. As the computer boots, press the F12 key when the Dell logo is displayed. 3. In the boot menu screen, use Up/Down arrow key to select the Diagnostics option and then press Enter.
  • Page 91 Table 5. Power LED summary Amber LED state White LED state System state Notes Blinking S3, no PWRGD_PS Previous State Previous State S3, no PWRGD_PS This entry provides for the possibility of a delay from SLP_S3# active to PWRGD_PS inactive. Blinking S0, no PWRGD_PS Steady...

  • Page 92: Diagnostic Error Messages

    One or more memory modules may be faulty or improperly seated. Reinstall the memory modules or, if necessary, replace them. DISK C: FAILED INITIALIZATION The hard drive failed initialization. Run the hard drive tests in Dell Diagnostics. DRIVE NOT READY The operation requires a hard drive in the bay before it can continue.
  • Page 93 Shut down the computer, remove the hard drive, and boot the computer from an optical drive. Then, shut down the computer, reinstall the hard drive, and restart the computer. If the problem persists, try another drive. Run the Hard Disk Drive tests in Dell Diagnostics. HARD-DISK DRIVE FAILURE The hard drive does not respond to commands from the computer.
  • Page 94 The operating system cannot find a specific track on the hard drive. SHUTDOWN FAILURE A chip on the system board may be malfunctioning. Run the System Set tests in Dell Diagnostics. If the message reappears, Contact Dell. TIME-OF-DAY CLOCK LOST POWER System configuration settings are corrupted. Connect your computer to an electrical outlet to charge the battery.

  • Page 95: System Error Messages

    [nnnn]. For help in consecutive times for the same error. resolving this problem, please note this checkpoint and contact Dell Technical Support CMOS checksum error RTC is reset, BIOS Setup default has been loaded. CPU fan failure CPU fan has failed.

  • Page 96: Getting Help

    Dell product catalog. 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.

  • Page 97: A Dust Filter For Dell Precision 3431 Small Form Factor

    Factor The dust filter for the Dell Precision 3431 Small Form Factor helps protect the system from fine dust particles. After installation of the dust filter, the BIOS can be enabled to generate a preboot reminder to clean or replace the dust filter based on the time interval set.
  • Page 98 Alerts are generated only during a system reboot and not during normal OS operation. To clean the dust filter, brush or gently vacuum and then wipe down the external surfaces with a moist cloth. Dust Filter for Dell Precision 3431 Small Form Factor...

  • Page 99: B Installing The Usb Type-C Card

    Installing the USB Type-C card 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover: a) Slide the release latch on the back panel of your system until it gives a click sound to unlock the side cover [1]. b) Slide and lift the side cover from the system [2].
  • Page 100 4. Release the hard drive and optical drive module: a) Disconnect the hard drive data cable and power cable from the connectors on the hard drive [1, 2]. b) Slide the release tab to unlock the hard drive and optical module [3]. c) Unroute the hard drive cables [1] and optical drive cables [2] through the retention clip and HDD-ODD release tab respectively.
  • Page 101 5. Remove the hard drive and optical drive module: a) Disconnect the optical drive data cable and optical drive power cable from the connectors on the optical drive [1, 2]. b) Slide and lift the hard drive and optical drive module from the system [3]. Installing the USB Type-C card...
  • Page 102 6. Remove the heat sink with fan: a) Disconnect the heat sink fan cable from the system board [1]. b) Loosen the four captive screws that secure the heat sink [2] and lift it away from the system [3]. NOTE: Loosen the screws in a sequential order (1,2,3,4) as mentioned on the system board.
  • Page 103 7. To install the USB Type-C card: a) Remove the filler using a philips screwdriver. Installing the USB Type-C card...
  • Page 104 b) Connect the USB Type-C card cable to the connector on the system board [1]. c) Align and place the USB Type-C card into the slot on the system chassis [2]. Installing the USB Type-C card...
  • Page 105 d) Connect the USB Type-C card cable to the connector on the system board [1]. e) Fasten the two screws to secure the USB Type-C card to the system chassis [2]. Installing the USB Type-C card...
  • Page 106 8. To install the heat sink: a) Align the heat sink onto the processor [1]. b) Tighten the four captive screws to secure the heat sink assembly to the system board [2]. NOTE: Tighten the screws in a sequential order (1,2,3,4) as mentioned on the system board. c) Connect the heat sink fan cable to the slot on the system board [3].
  • Page 107 9. To install the hard drive and optical drive module: a) Insert the tabs on the hard drive and optical drive module into the slot on the system at a 30-degree angle [1]. b) Connect the optical drive data cable and power cable to the connectors on the optical drive [2, 3]. c) Lower the hard drive and optical drive module so that it is placed in its slot [4].
  • Page 108 d) Route the optical drive data cable and power cable through the retention clips [1]. e) Route the hard drive data and power cables through the HDD-ODD release tab [2]. Installing the USB Type-C card...
  • Page 109 f) Slide the release tab to lock the module [1]. g) Connect the hard drive data cable and power cable from the connectors on the hard drive [2, 3]. Installing the USB Type-C card...
  • Page 110 10. To install the front bezel: a) Align the bezel, and insert the retention tabs on the bezel into the slots on the system. b) Press the bezel until the tabs clicks into place. Installing the USB Type-C card...
  • Page 111 11. To install the side cover: a) Place the cover on the system and slide the cover until it clicks into place. b) The release latch automatically locks the side cover to the system. Installing the USB Type-C card...

  • Page 112: C Installing The Vga Card

    Installing the VGA card 1. Follow the procedure in Before working inside your computer. 2. Remove the side cover: a) Slide the release latch on the back panel of your system until it gives a click sound to unlock the side cover [1]. b) Slide and lift the side cover from the system [2].
  • Page 113 4. Release the hard drive and optical drive module: a) Disconnect the hard drive data cable and power cable from the connectors on the hard drive [1, 2]. b) Slide the release tab to unlock the hard drive and optical module [3]. c) Unroute the hard drive cables [1] and optical drive cables [2] through the retention clip and HDD-ODD release tab respectively.
  • Page 114 5. Remove the hard drive and optical drive module: a) Disconnect the optical drive data cable and optical drive power cable from the connectors on the optical drive [1, 2]. b) Slide and lift the hard drive and optical drive module from the system [3]. Installing the VGA card...
  • Page 115 6. Remove the heat sink with fan: a) Disconnect the heat sink fan cable from the system board [1]. b) Loosen the 4 captive screws that secure the heat sink [2] and lift it away from the system [3]. NOTE: Loosen the screws in a sequential order (1,2,3,4) as mentioned on the system board.
  • Page 116 7. To install the VGA card: a) Remove the filler using a philips screwdriver . Installing the VGA card...
  • Page 117 b) Connect the VGA card cable to the connector on the system board [1]. c) Align and place the VGA card into the slot on the system chassis [2]. Installing the VGA card...
  • Page 118 d) Fasten the two screws to secure the VGA card to the system chassis [1]. Installing the VGA card...
  • Page 119 8. To install the heat sink: a) Align the heat sink onto the processor [1]. b) Tighten the four captive screws to secure the heat sink assembly to the system board [2]. NOTE: Tighten the screws in a sequential order (1,2,3,4) as mentioned on the system board. c) Connect the heat sink fan cable to the slot on the system board [3].
  • Page 120 9. To install the hard drive and optical drive module: a) Insert the tabs on the hard drive and optical drive module into the slot on the system at a 30-degree angle [1]. b) Connect the optical drive data cable and power cable to the connectors on the optical drive [2, 3]. c) Lower the hard drive and optical drive module so that it is placed in its slot [4].
  • Page 121 d) Route the optical drive data cable and power cable through the retention clips [1]. e) Route the hard drive data and power cables through the HDD-ODD release tab [2]. Installing the VGA card...
  • Page 122 f) Slide the release tab to lock the module [1]. g) Connect the hard drive data cable and power cable from the connectors on the hard drive [2, 3]. Installing the VGA card...
  • Page 123 10. To install the front bezel: a) Align the bezel, and insert the retention tabs on the bezel into the slots on the system. b) Press the bezel until the tabs clicks into place. Installing the VGA card...
  • Page 124 11. To install the side cover: a) Place the cover on the system and slide the cover until it clicks into place. b) The release latch automatically locks the side cover to the system. Installing the VGA card...

  • Page 125: D Cable Cover For Dell Precision 3431 Small Form Factor

    Cable cover for Dell Precision 3431 Small Form Factor The cable cover for a Dell Precision 3431 Small Form Factor helps protect ports and cables connected to the system. Follow these steps to install the cable cover on the system chassis.
  • Page 126 Take care not to break or bend the delicate plastic hooks. 6. Gently press down on the cable cover until it clicks into place (1). Slide the latch towards the chassis (2) to lock the cable cover in place. Cable cover for Dell Precision 3431 Small Form Factor...
  • Page 127 7. To remove the cable cover: a) Slide the latch away from the chassis to unlock the cable cover [1]. b) Lift the cable cover away from the system chassis [2]. Cable cover for Dell Precision 3431 Small Form Factor...

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