In this guide, I’ll disassemble Lenovo ThinkPad W540. Refer to this guide, you can upgrade and clean your ThinkPad W540, or remove and replace the hard drive, ram, wireless card, keyboard, palm rest, heat sink and cooling fan.
Turn off your laptop, unlock and remove the battery.
Remove the screws securing the wireless card cover and hard drive cover, remove these two covers.
Remove all the screws from the bottom case.
Flip over the laptop, sliding the keyboard to the screen.
You can see some little screws securing the keyboard. Remove all screws.
Place the keyboard on your palm rest. You can access the keyboard cable and backlit cable.
Disconnect two cables, you can remove the keyboard.
Disconnect the switch cable.
Remove all screws securing the palm rest.
Pry up and lift up the palm rest, disconnect the cables, remove the palm rest.
Remove ten screws securing the roll cage.
Remove two screws (left and right).
Disconnect the speaker cable. You can remove the roll cage.
Now you can access the heat sink and cooling fan.
Remove the screws securing the heat sink and cooling fan. Disconnect the cooling fan cable from the motherboard.
Now the cooling fan has been removed, you can clean it with a brush.