Dell Inspiron 14-5457 Owner's Manual page 31

3 Disconnect the I/O-board cable from the system board.
1 latch
3 I/O-board cable
4 Disconnect the fan cable from the system board.
5 Note the fan-cable routing and remove the cable from the routing
guides.
6 Remove the screws that secure the fan to the base frame.
2 pull tab
31