IBM ThinkPad X20 Hardware Maintenance Manual page 69

When installing: When installing the keyboard, do as
follows:
1. Install the new keyboard, following the directions in the
figure. Make sure that the keyboard edges, shown in
the figure as (A), (B), (C), (D)and (E), are under the
Chapter 3. ThinkPad X20, X21, X22, X23
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