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Inspiron 15 3520 Service Manual

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Removing the system board

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Remove the SD card.
  3. Remove the base cover.
  4. Remove the 3-cell battery or 4-cell battery (whichever applicable).
  5. Remove the M.2 2230 solid-state drive or M.2 2280 solid-state drive (whichever applicable).
  6. Remove the memory modules.
  7. Remove the wireless card.
  8. Remove the fan.
  9. Remove the heat sink.
  10. Remove the display assembly.

About this task

The following image indicates the connectors on your system board.

System board callout
  1. Fan connector
  2. I/O board FFC connector
  3. eDP connector
  4. DC-in port connector
  5. Keyboard FFC connector
  6. Keyboard-backlight FFC connector
  7. Battery connector
  8. Memory modules
  9. Touchpad FFC connector
  10. Hard drive FFC connector
  11. Wireless connector
  12. Speaker cable connector
  13. Solid-state drive connector

The following images indicate the location of the system board and provide a visual representation of the removal procedure.

Removing the system board

Steps

  1. Remove the two (M2.5x5) screws from the right hinge.
  2. Pry open the right-display hinge at an angle of 90 degrees.
  3. Disconnect the following cables from the system board:
    1. I/O board Flexible Flat cable
    2. Speaker cable
    3. Hard drive Flexible Flat cable (for systems with 2.5-inch hard drive)
    4. Touchpad Flexible Flat cable
    5. Keyboard backlight Flexible Printed cable (for systems with backlit keyboard)
    6. Keyboard Flexible Printed cable
    7. Power adapter port cable
    8. eDP cable
  4. Remove the three (M2x3.5) screws and the single (M2x2) screw that secures the system board to the palm-rest assembly.
  5. Carefully lift the system board away from the chassis.
    NOTE:For systems shipped with a USB Type-C port, do not remove the type-C bracket that is secured to the system board.
    For systems shipped with a USB Type-C port, DO NOT remove the Type-C bracket that is secured to the system board.

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