Dell Vostro 14 3430 Owner's Manual page 122

Steps
1. Align the ports on the system board to the port openings on the palm-rest and keyboard assembly.
2. At an angle, carefully slide and place the system board on the palm-rest and keyboard assembly.
3. Align the screw holes on the system board with the screw holes on the palm-rest and keyboard assembly.
4. Replace the screw (M2x2) and the three screws (M2x3.5) to secure the system board to the palm-rest and keyboard
assembly.
122 Removing and installing Field Replaceable Units (FRUs)