This 3D experience gives you the step by step process of replacing the Fan on a Dell 15 DC15255. The procedure will also include removing the Base Cover and reinstalling them.
Removal
Base Cover
Identify the base cover highlighted in blue.
Loosen the captive screws on the base cover.
Remove the screws that secure the base cover.
Using a plastic scribe, pry the base cover near the hinges to release it from the system.
Remove the base cover by loosening the sides and front.
Fan
Identify the fan highlighted in blue.
Disconnect the fan cable from the system board.
Remove the screws that secure the fan to the system.
Lift to remove the fan from the system.
Install
Fan
Identify the fan location highlighted in blue.
Install the fan in the slot on the system and align the screw holes.
Install the screws that secure the fan to the palm rest assembly.
Connect the fan cable to the system board.
Base Cover
Identify the base cover location highlighted in blue.
Install the base cover and press the edges and sides until it snaps into place.
Tighten the captive screws that secure the base cover.