Dell P127F Owner's Manual page 127

Steps
Place the palm-rest assembly on a flat surface.
Next steps
1. Install the smart card
2. Install the display assembly.
3. Install the system board.
4. Install the assembly inner
5. Install the battery.
6. Install the heat sink.
7. Install the M.2 2230 solid-state drive in Slot
8. Install the M.2 2230 or
9. Install the memory modules.
10. Install the WLAN card.
11. Install the 4G WWAN card
12. Install the base cover.
13. Install the SIM card.
14. Follow the procedure in
reader, if applicable.
frame.
2, if applicable.
M.2 2280 solid-state drive in Slot 1, as applicable.
or 5G WWAN card, as applicable.
After working inside your computer.
Removing and installing Field Replaceable Units (FRUs) 127