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Inspiron 14 7420 2-in-1 Service Manual

Removing the I/O board

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Remove the base cover.
  3. Remove the fan.

About this task

The following image indicates the location of the I/O-board and provides a visual representation of the removal procedure.

Image: Removing the IO board

Steps

  1. Remove the two screws (M2.5x4) that secure the left-display hinge to the I/O board.
  2. Pry open the left-display hinge at an angle of 90 degrees.
  3. Peel the tape that secures the I/O board-connector latch to the I/O board.
  4. Lift the I/O-board cable-connector latch and disconnect the I/O-board cable from the I/O board.
  5. Lift the latch and disconnect the power-button with fingerprint reader cable from the I/O board.
    NOTE:This step is only applicable to computers shipped with the optional fingerprint reader.
  6. Disconnect the coin-cell battery cable from the I/O board.
  7. Remove the two screws (M2x3) that secure the I/O board to the palm-rest and keyboard assembly.
  8. Lift the I/O board off the palm-rest and keyboard assembly.

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