Lenovo ThinkPad W520 4284 Hardware Maintenance Manual page 76

Table 17. Removal steps of keyboard (continued)
1. Push down the keyboard a little toward the arrow
the keyboard bezel.
2. Lift the keyboard a little in the direction shown by arrow
When installing the keyboard, do as follows:
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ThinkPad T520, T520i, and W520 Hardware Maintenance Manual
2
until the front edge of the keyboard is detached from
2
3
4
3
, and then detach the connector
4
.