This 3D experience gives you the step by step process of replacing the I/O Board on a Dell 15 DC15255. The procedure will also include removing the Base Cover, Battery Cable 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.
Battery Cable
Identify the battery cable highlighted in blue.
Using the pull tab, disconnect the battery cable from the system board.
Press and hold the power button for 10 seconds to ground the system and remove residual static electricity.
I/O Board
Identify the I/O board highlighted in blue.
Remove the screws that secure the left display hinge to the system.
Lift to open the left display hinge.
Remove the screws that secure the I/O board.
Slide and remove the I/O board at angle from the palm rest assembly.
Install
I/O Board
Identify the I/O board location highlighted in blue.
Slide and install the I/O board at an angle on the palm rest assembly.
Install the screws that secure the I/O board.
Close the left hinge and align the screw holes.
Install the screws to secure the left hinge to the system.
Battery Cable
Identify the battery cable location highlighted in blue.
Connect the battery cable to the connector on 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.