In models with the fingerprint reader, the sensor is attached to the palm rest FRU. If the fingerprint reader has any defects, you can replace it by the procedures given in this section, which are the same for a palm rest with or without a fingerprint reader.
M2 × 17 mm, pan-head, nylon-coated (1)
0.167 Nm(1.7 kgfcm)
Lift the keyboard a little in the direction shown by arrow (2), and then detach the connector (3).
When installing: Make sure that the keyboard edges (a) are under the frame as shown in this figure.