In this tutorial I show how to remove and replace the keyboard on a Dell Latitude C840 laptop. This is a few years old laptop but I still like it and use every day. The keyboard removal and replacement procedure is pretty much straightforward and shouldn’t take more more than 15 minutes.
Turn off the laptop, unplug the power adapter and remove the battery.
On the bottom of the laptop you’ll find four screws with a letter “K” witch means keyboard. Remove all four screws.
Insert a small flathead screwdriver between the keyboard and laptop case (on the right side) and carefully lift up the keyboard.
The keyboard is attached to the motherboard via a flat ribbon cable.
You can disconnect the keyboard cable connector from the motherboard with a small screwdriver. Carefully lift up each side of the connector.
Disconnect the keyboard from the motherboard. Now you can remove and replace the keyboard.
You can find a new keyboard if you search by the part number from the back of the original keyboard. In my case the part number is 03J247. New replacement keyboards are available here.
When you remove the keyboard it opens a window to the CPU heat sink. If the heat sink is clogged with dust you can blow it off with compressed air. Spray air inside the heat sink until it’s clean.