IBM ThinkPad 340 Series Hardware Maintenance Manual page 370

The keyboard unit is connected to the system board with
flexible cables. Remove the upper cover; then disconnect
the cables to remove the keyboard unit as shown.
To remove the top cover, do not latch the keyboard.
Lower the keyboard and remove the top cover.
Warning: Do not pull the keyboard cables.
The keyboard cables will be damaged if the keyboard
is disconnected without releasing the three latches
▌7▐.
Notes:
1. When replacing the keyboard, check that the three
cables are clean, and inserted straight and fully into
the connectors. Slide both ends of each latch at the
same time to make sure that each cable is correctly
inserted. Go to "Keyboard/Auxiliary Input Device
Checkout" on page 320 and test all keys before
returning the computer to the customer.
2. When replacing the top cover, insert the four latches
at the rear side of the cover into the foot guide of the
the LCD; push the right, left, and front sides to snap it
into place.
Use the following table for reference when replacing parts.
360
IBM Mobile Systems HMM
EMI Spring Plate