IBM Thinkpad T40 Manual

							vSystem board without IBM security chip (bottom view)
Begin by checking the FRU number of the system board,
and be sure to use the correct system board for the
computer. For the FRU numbers, see“Parts list”on
page 137.
ImportantIf the ThinkPad computer you are servicing has a
security chip, mind the following:
vDo not remove the security chip from the
system board. If the security chip is removed by
accident, reinstall it on the system board
immediately. Then make sure that it is firmly fixed
on the system board and does not move easily.
vThe security chipcannotbe used with any other
system board.
vThe system boardcannotbe used with any other
security chip.
vThe system boardcannotbe used without the
security chip.
vIf you return a defective system board, you must
check whether the security chip is embedded. If it
is not, the board may not be covered under
warranty.
Removing and replacing a FRU
ThinkPad T40 Series107 
						

							Before removing the system board, remove the support
structure (
a) and the cable guide (
b).
2
2
1
3
b
a
When installing:Make sure that the connectors
2are
firmly attached to the system board.
(continued)
Removing and replacing a FRU
108ThinkPad T40 Series (MT 2373, 2374, 2375, 2376) 
						

							5
4
6
Step Screw (quantity) Color Torque

4M2×10 mm, flat-head,
nylon-coated (1)Black 0.245 Nm
(2.5 kgfcm)

5M2×4 mm, bind-head,
nylon-coated (1)Black 0.392 Nm
(4 kgfcm)
(continued)
Removing and replacing a FRU
ThinkPad T40 Series109 
						

							7
8
c
d
9
Step Screw (quantity) Color Torque

7M2×3 mm, small-head,
nylon-coated (1)Silver 0.245 Nm
(2.5 kgfcm)

8M2×10 mm, flat-head,
nylon-coated (1)Black 0.245 Nm
(2.5 kgfcm)
In step
9, remove the I/O plate bracket (
c) and the
system board (
d) together.
(continued)
Removing and replacing a FRU
11 0ThinkPad T40 Series (MT 2373, 2374, 2375, 2376) 
						

							11
10
12
Step Screw (quantity) Color Torque

10Hex stud (2) Silver 0.392 Nm
(4 kgfcm)

11M2.5×3 mm, bind-head,
nylon-coated (1)Gold 0.392 Nm
(4 kgfcm)
When installing:Attach the system board so that the two
small projections on the base cover fit
into the holes provided, and then secure
the system board with the screw.
Removing and replacing a FRU
ThinkPad T40 Series111 
						

							Note for sticking a label kit on the base coverNew base cover FRU is shipped with several kinds
of label kit. When you replace the base cover, you
need to stick a homologation label
awhich has
the same part no. with the label on the old base
cover (defective FRU) on the new base cover.
In some models, you also need to stick one or two
FCC labels
b. Check the old base cover and if
there is one or two FCC leabels on it, find the same
one from the label kit and stick it on the new base
cover.
Stick the labels on the new base cover as shown in
this figure.
ab
b
Removing and replacing a FRU
11 2ThinkPad T40 Series (MT 2373, 2374, 2375, 2376) 
						

							2010 LCD front bezel
For access, remove these FRUs in order:
v“1010 Battery pack”on page 66
v“1030 Hard-disk drive”on page 69
v“1050 Keyboard”on page 73
v“1080 Bluetooth/Modem daughter card (BMDC)”on
page 80
v“1090 Palm rest”on page 82
v“1100 Mini PCI adapter”on page 84
v“1150 Keyboard bezel”on page 94
v“1160 LCD assembly”on page 96
3
3
3
3
3
3
2
2
1
1
2
Step Screw
capScrew (quantity) Color Torque

1
M2×3 mm, pan-head,
nylon-coated (2)Black 0.245 Nm
(2.5 kgfcm)

2
M2.5×4.8 mm,
bind-head, nylon-coated
(3)Black 0.392 Nm
(4 kgfcm)

3
M2×3 mm, pan-head,
nylon-coated (6)Balck 0.245 Nm
(2.5 kgfcm)
(continued)
Removing and replacing a FRU
ThinkPad T40 Series11 3 
						

							5
4
Removing and replacing a FRU
11 4ThinkPad T40 Series (MT 2373, 2374, 2375, 2376) 
						

							2020 Inverter card
For access, remove these FRUs in order:
v“1010 Battery pack”on page 66
v“1030 Hard-disk drive”on page 69
v“1050 Keyboard”on page 73
v“1080 Bluetooth/Modem daughter card (BMDC)”on
page 80
v“1090 Palm rest”on page 82
v“1100 Mini PCI adapter”on page 84
v“1150 Keyboard bezel”on page 94
v“1160 LCD assembly”on page 96
v“2010 LCD front bezel”on page 113
1
2
3
4
Step Screw (quantity) Color Torque

1M2×3 mm, small-head,
nylon-coated (1)Silver 0.245 Nm
(2.5 kgfcm)
When installing:Make sure that connectors
2and
3
are firmly attached.
Cable routing:When replacing the inverter card, route
the connector cable as in this figure:
Removing and replacing a FRU
ThinkPad T40 Series11 5 
						

							2030 Bluetooth antenna assembly
NoteThis section is only for the models with the
Bluetooth features. Other models do not have this
antenna.
For access, remove these FRUs in order:
v“1010 Battery pack”on page 66
v“1030 Hard-disk drive”on page 69
v“1050 Keyboard”on page 73
v“1080 Bluetooth/Modem daughter card (BMDC)”on
page 80
v“1090 Palm rest”on page 82
v“1100 Mini PCI adapter”on page 84
v“1150 Keyboard bezel”on page 94
v“1160 LCD assembly”on page 96
v“2010 LCD front bezel”on page 113
Slide the spiral tube binding the antenna cables (
1) first,
and then release the cables from the cable guide (
2).
2
1
(continued)
Removing and replacing a FRU
11 6ThinkPad T40 Series (MT 2373, 2374, 2375, 2376)