If
the
resistance
is
not
correct,
replace
the
battery
pack.
If
the
resistance
is
correct,
replace
the
system
board.
Checking
the
backup
battery
Do
the
following:
1.
Power
off
the
computer,
and
unplug
the
ac
adapter
from
it.
2.
Turn
the
computer
upside
down.
3.
Remove
the
battery
pack
(see
“1010
Battery
pack”
on
page
64).
4.
Remove
the
backup
battery
(see
“Checking
the
battery
pack”
on
page
40).
5.
Measure
the
voltage
of
the
backup
battery.
See
the
following
figure.
Red(+)
Blue(-)
Wire
Voltage
(V
dc)
Red
+2.5
to
+3.2
Blue
Ground
v
If
the
voltage
is
correct,
replace
the
system
board.
v
If
the
voltage
is
not
correct,
replace
the
backup
battery.
v
If
the
backup
battery
discharges
quickly
after
replacement,
replace
the
system
board.
Checkout
guide
42
ThinkPad
R40
Содержание ThinkPad R40 2681
Страница 6: ...2 ThinkPad R40...
Страница 88: ...3 Removing and replacing a FRU 84 ThinkPad R40...
Страница 93: ...Modem daughter card MDC 3 4 5 continued Removing and replacing a FRU ThinkPad R40 89...
Страница 105: ...7 7 Removing and replacing a FRU ThinkPad R40 101...
Страница 109: ...Remove the keyboard bezel in the direction of arrow 2 2 2 Removing and replacing a FRU ThinkPad R40 105...
Страница 111: ...Remove the keyboard bezel in the direction of arrow 2 2 2 Removing and replacing a FRU ThinkPad R40 107...
Страница 132: ...5 6 7 8 10 11 12 13 14 9 1 2 3 4 15 16 Locations 128 ThinkPad R40...
Страница 165: ...LCD FRUs 1 2 3 4 5 Parts list ThinkPad R40 161...
Страница 183: ...Notices ThinkPad R40 179...
Страница 184: ...Part Number 13N6183 Printed in Korea 1P P N 13N6183...