Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

Latitude 5420 Service Manual

PDF

Removing the system board

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Enter service mode.
  3. Remove the SIM card.
  4. Remove the microSD card.
  5. Remove the base cover.
  6. Remove the WLAN card.
  7. Remove the WWAN card.
  8. Remove the memory module.
  9. Remove the heat sink.
  10. Remove the solid-state drive.
  11. Remove the battery.
  12. Remove the assembly inner frame.

About this task

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

system board

system board

Steps

NOTE:The system board can be removed and installed with the heat sink attached in order to simplify the procedure and preserve the heat sink between the system board and heat-sink. In order to do so, technicians must also remove the two (M2x5) screws the secure the system fan to the system board.
NOTE:For the models shipped with a fingerprint reader, disconnect the fingerprint reader cable from the connector on the system board before removing the system board from the palm-rest assembly and keyboard assembly.

  1. Remove the two screws (M2x3) that secure the eDP/display cable bracket to the system board.
  2. Lift the eDP/display cable bracket away from the system.
  3. Peel the tape that secures the display cable to the system board.
  4. Using the pull tab, disconnect the display cable from the connector on the system board.
  5. Disconnect the coin-cell battery cable from the connecter on the system board.
    NOTE:When you disconnect the coin-cell battery cable from the connecter on the system board, the CMOS setting is cleared.
  6. Open the latch and disconnect the USH board cable from the connector on the system board.
  7. Open the latch and disconnect the touch-pad cable from the connector on the system board.
  8. Remove the three screws (M2x5) that secure the USB Type-C bracket to the system board.
  9. Lift off the USB Type-C bracket off the system board.
  10. Remove the four screws (M2x5) that secure the system board to the palm-rest assembly and keyboard assembly.
  11. Lift the system board off the palm-rest assembly and keyboard assembly.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\