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Inspiron 3891 Service Manual

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Installing the system board

Prerequisites

If you are replacing a component, remove the existing component before performing the installation process.

About this task

NOTE For computers that are shipped with 11th Generation Intel Core i5-11400F and 11th Generation Intel Core i7-11700F processors, a VGA-connector cover is installed over the VGA connector, and a HDMI-port cover is installed over the HDMI port.
NOTE Your computer's Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup program after you replace the system board.
NOTE Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program. You must make the appropriate changes again after you replace the system board.
NOTE If either the processor or the fan and heat-sink assembly is replaced, use the thermal grease provided in the kit to ensure that thermal conductivity is achieved.

The following image(s) indicate the location of the system board and provides a visual representation of the installation procedure.

Installing the system board 1

Installing the system board 2

Installing the system board 3

Steps

  1. Slide the front I/O-ports on the system board into the front I/O-slots on the chassis and align the screw holes on the system board with the screw holes on the chassis.
  2. Replace the eight screws (6-32) that secure the system board to the chassis.
  3. Connect the following cables to the system board. Refer to the system-board components for more information about the respective connectors of the following cables.
    • power-supply cables
    • hard-drive cable
    • power-button cable
  4. Align the front I/O bracket to the front I/O ports and the screw holes on the chassis.
  5. Replace the two screws that secure the front I/O bracket to the chassis.

Next steps

  1. Install the processor.
  2. Install the fan and heat-sink assembly.
  3. Install the media-card reader.
  4. Install the graphics card.
  5. Install the hard drive.
  6. Install the wireless card.
  7. Install the solid-state drive.
  8. Install the fan shroud.
  9. Install the front cover.
  10. Install the left-side cover.
  11. Follow the procedure in After working inside your computer.

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