Lenovo Tb-8504F/Lenovo Tb-8504X; Fru Replacement Notices; Screw Notices - Lenovo TB-8504X Hardware Maintenance Manual

Lenovo TB-8504F/Lenovo TB-8504X

This chapter presents the following product-specific service references and
product-specific parts information:
• "FRU replacement notices" on page 21
• "Removing and replacing an FRU" on page 23
• "Locations" on page 35
• "Parts list" on page 36

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 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:
Lenovo TB-8504F/Lenovo TB-8504X
more than 90°
(Cross-section)
21