Lenovo Laptop S110 User Manual download pdf (Page 33)

Lenovo IdeaPad S110 Hardware Maintenance Manual

FRU replacement notices

This section presents notices related to removing and replacing parts. Read this

section carefully before replacing any FRU.

Screw notices

Loose screws can cause a reliability problem. In the Lenovo IdeaPad computer,

this problem is addressed with special nylon-coated screws that have the

following characteristics:

• They maintain tight connections.

• They do not easily come loose, even with shock or vibration.

• They are harder to tighten.

• Each one should be used only once.

Do the following when you service this machine:

• Keep the screw kit in your tool bag.

• Always use new screws.

• Use a torque screwdriver if you have one.

Tighten screws as follows:

• Plastic to plastic

Turn an additional 90° after the screw head touches the surface of the plastic

part:

• Logic card to plastic

Turn an additional 180° after the screw head touches the surface of the logic

card:

• Torque driver

If you have a torque screwdriver , refer to the “Torque” column for each step.

• Make sure that you use the correct screws. If you have a torque screwdriver,

tighten all screws firmly to the torque shown in the table. Never use a screw

that you removed. Use a new one. Make sure that all screws are tight-

ened firmly.

• Ensure torque screwdrivers are calibrated correctly following country specifi-

cations.

more than 90°

(Cross-section)

more than 180°

(Cross-section)

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Lenovo Laptop S110 User Manual Page 33