Lenovo 28155YU manual For access, remove these FRUs in order, Step, Screw quantity, Color, Torque

1100 Palm rest or palm rest with fingerprint reader

For access, remove these FRUs in order:

v“1010 Battery pack” on page 83

v“1030 Solid state drive (SSD) or hard disk drive (HDD)” on page 85

v“1070 Keyboard” on page 95

Note:

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.

Table 20. Removal steps of palm rest or palm rest with fingerprint reader

1
1
1
1	2
1
	1
	1
	1

Step	Screw (quantity)	Color	Torque
	M2 ⋅ 4 mm, bind-head, nylon-coated (8)	Black	0.167 Nm
			(1.7 kgfcm)
	M2 ⋅ 6 mm, bind-head, nylon-coated (2)	Black	0.167 Nm
			(1.7 kgfcm)

Removing and replacing a FRU 103