Chapter 7. Fru Replacement Notices; Service Tool Kit; Screw Notices - Lenovo ThinkPad L14 Gen 4 Hardware Maintenance Manual

Chapter 7. FRU replacement notices

Read this chapter carefully before replacing any FRU.

Service tool kit

Ensure that the following service tool kit is prepared before you service a notebook computer.
No. Tool name
1 Phillips-head screwdriver
2
Conductive tweezers
3 Pry tool
4 Silicone grease
5
Polyamide tape
6 Mylar tape
7 Eraser
8 Electrical tape
9 Double-sided tape
10 Conductive tape
11 Trackpad jig (this might come with trackpad)
Note: The silicone grease can be applied to the surfaces of the microprocessor and heat sink to eliminate air
gaps.

Screw notices

Loose screws can cause a reliability problem. In your 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.
Do the following when you service the computer:
• Keep the screw kit in your tool bag. For the part number of the screw kit, go to:
https://support.lenovo.com/partslookup
Tighten screws as follows:
• Plastic to plastic
Turn an additional angle of 90 degrees after the screw head touches the surface of the plastic part.
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Tool type
Common tool
Common tool
Common tool
Consumable tool
Consumable tool
Consumable tool
Consumable tool
Consumable tool
Consumable tool
Consumable tool
Consumable tool
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