IBM ThinkPad R40 2681 User Manual

FRU replacement notices
This section contains 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 IBM
ThinkPad computer, this problem is addressed with special
nylon-coated screws that have the following characteristics:
v They maintain tight connections.
v They do not easily come loose, even with shock or
vibration.
v They are harder to tighten.
v They should be used only once.
Do
the following when you service this machine:
v Keep the screw kit (for the P/N, see “Miscellaneous
parts” on page 169) in your tool bag.
v Always use new screws.
v Use a torque screwdriver if you have one.
Tighten
screws as follows:
v Plastic to plastic
Turn an additional 90 degrees after the screw head
touches the surface of the plastic part:
90 degrees more
(Cross-section)
v Logic card to plastic
Turn an additional 180 degrees after the screw head
touches the surface of the logic card:
180 degrees more
(Cross-section)
v Torque driver
If you have a torque driver, refer to the “Torque” column
for each step.
FRU replacement notices
60 ThinkPad R40

IBM ThinkPad R40 2681 Specifications

General

Brand	IBM
Model	ThinkPad R40 2681
Category	Laptop
Language	English