IBM replacement, notices, Screw

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 the 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 Each one 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 251) 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:
90degrees more
(Cross-section)
v Logic card to plastic
Turn an additional 180 degrees after the screw head
touches the surface of the logic card:
180degrees more
(Cross-section)
v Torque driver
If you have a torque driver, refer to the “Torque” column
for each step.
FRU replacement notices
ThinkPad T40/T40p, T41/T41p, T42/T42p Series 67