Installing The System Board - Dell Vostro 3520 Service Manual

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:
a. I/O board Flexible Flat cable
b. Speaker cable
c. Hard drive Flexible Flat cable (for systems with 2.5-inch hard drive)
d. Touchpad Flexible Flat cable
e. Keyboard backlight Flexible Printed cable (for systems with backlit keyboard)
f. Keyboard Flexible Printed cable
g. Power adapter port cable
h. 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.

Installing the system board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image indicates the connectors on your system board.
96 Removing and installing components