Note:
Recharging
will
take
at
least
3
hours,
even
if
the
indicator
does
not
turn
on.
If
the
voltage
is
still
less
than
+11.0
V
dc
after
recharging,
replace
the
battery.
4.
If
the
voltage
is
more
than
+11.0
V
dc,
measure
the
resistance
between
battery
terminals
4
and
5.
The
resistance
must
be
4
to
30
K
.
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
76).
4.
Remove
the
backup
battery
(see
“Checking
the
battery
pack”
on
page
45).
5.
Measure
the
voltage
of
the
backup
battery.
See
the
following
figure.
Red (+)
Black (-)
Wire
Voltage
(V
dc)
Red
+2.5
to
+3.2
Black
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
46
MT
2672,
2673,
2884,
2885
Summary of Contents for 2672PXU - THINKPAD X31 PM-1.6G 40GB
Page 6: ...2 MT 2672 2673 2884 2885 ...
Page 130: ...3 4 6 5 continued Removing and replacing a FRU 126 MT 2672 2673 2884 2885 ...
Page 133: ...3 4 6 9 8 7 continued Removing and replacing a FRU ThinkPad X30 X31 X32 129 ...
Page 174: ...LCD FRUs 12 1 in XGA TFT 1 3 6 2 4 5 7 Parts list 170 MT 2672 2673 2884 2885 ...