Dell Inspiron 23 (2350, Mid 2013) - Manual (Page 50)

Procedure
WARNING: The heat sink may become hot during normal operation.
Allow sufficient time for the heat sink to cool before you touch it.
1 Peel off the Mylar from the heat sink and fan.
1 heat sink 2 Mylar
3 fan
2 Disconnect the fan cable from the system board.
3 Remove the screws that secure the fan to the computer base.
50