Dell XPS 13 7390 2-in-1 Service Manual page 30

Steps
1. Align the screw holes on the keyboard with the screw holes on the palm-rest assembly.
NOTE: Adhere the two conductive tapes on the keyboard, and then adhere the three copper foils on the palm-rest
assembly to secure the keyboard assembly to the palm-rest assembly.
2. Replace the 38 screws (M1.2x1.4) and ten screws (M1.2x1.6) that secure the keyboard to the palm-rest assembly.
NOTE: Do not install keyboard assembly screws into locations that are marked with MB. Those screw holes are
reserved for system board screws.
3. Adhere the keyboard controller board cable to the keyboard.
4. Connect the keyboard cable and keyboard backlight cable to the keyboard controller board.
5. Adhere the right keyboard bracket in the slots on the palm-rest assembly.
6. Tighten the captive screw that secures the right keyboard bracket to the palm-rest assembly.
7. Adhere the right keyboard bracket in the slots on the palm-rest assembly.
8. Tighten the captive screw that secures the left keyboard bracket to the palm-rest assembly.
9. Route the speaker cable through the routing guides on the left keyboard assembly.
10. Adhere the fingerprint reader cable to the keyboard.
Next steps
1. Install the system-board
2. Install the battery.
3. Install the base cover.
4. Follow the procedure in
30 Removing and installing components
assembly.
After working inside your computer.