Sony Vaio PCG-F420 Keyboard Replacement

The battery is located on the left side of the laptop, as shown by the red circle.

Make sure the laptop is disconnected and turned completely off.

Pull the plastic cover down (indicated by the arrow on the cover) and then swing it upwards to reveal the battery compartment.

The battery can now be removed by pulling it.

Use your Philips #00 screwdriver to unscrew the small screw counterclockwise. This screw is for the audio/visual jacks on the left side of the laptop.

Unlock the cover between the keyboard and screen.

Gently slide it to the right and lift it up.

Exercise caution to avoid excessive force, as wires are connected.

Lift up the cover and lean it against the display so it is out of the way for the rest of the process.

Remove the small screw above the F6 key on the keyboard. Place screw in container to ensure it wont be lost.

Find the green ribbon as indicated in the picture by the red circle. This is what connects the keyboard to the motherboard.

Carefully unplug the ribbon cable using a pair of tweezers.

Lift up the white bar near the connection to the motherboard, and lightly lift the ribbon to release it from the motherboard.

Now, pull on the ribbon cable, and it will detach from the motherboard.

Your keyboard is now safety detached. Necessary repairs or replacements can be made from here.