Dell XPS 13 9340 Owner's Manual page 61

Figure 42. Installing the system board
Steps
NOTE: When installing the system board, open the display assembly to a 90-degree angle and then place the computer on
the edge of a flat surface. Ensure to maintain the angle throughout the installation process to minimize the risk of damaging
the thin display panel when applying torque to install and remove screws from the computer.
Removing and installing Field Replaceable Units (FRUs) 61