Dell Inspiron 15 3535 Owner's Manual page 111

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. Touchpad Flexible Flat cable
d. Keyboard backlight Flexible Printed cable (for systems with backlit keyboard)
e. Keyboard Flexible Printed cable
f. Power adapter port cable
g. eDP cable
4. Remove the four (M2x3.5) screws that secure the system board to the palm-rest assembly.
5. Remove the single (M2x2) screw that secures the system board to the palm-rest assembly.
Removing and installing Field Replaceable Units (FRUs) 111