Power
system
checkout
To
verify
a
symptom,
do
the
following:
1.
Turn
off
the
computer.
2.
Remove
the
battery
pack.
3.
Connect
the
ac
adapter.
4.
Check
that
power
is
supplied
when
you
turn
on
the
computer.
5.
Turn
off
the
computer.
6.
Disconnect
the
ac
adapter
and
install
the
charged
battery
pack.
7.
Check
that
the
battery
pack
supplies
power
when
you
turn
on
the
computer.
If
you
suspect
a
power
problem,
see
the
appropriate
one
of
the
following
power
supply
checkouts:
v
“Checking
the
ac
adapter”
v
“Checking
operational
charging”
on
page
43
v
“Checking
the
battery
pack”
on
page
43
v
“Checking
the
backup
battery”
on
page
44
Checking
the
ac
adapter
You
are
here
because
the
computer
fails
only
when
the
ac
adapter
is
used.
v
If
the
power
problem
occurs
only
when
the
port
replicator
is
used,
replace
the
port
replicator.
v
If
the
power-on
indicator
does
not
turn
on,
check
the
power
cord
of
the
ac
adapter
for
correct
continuity
and
installation.
v
If
the
computer
does
not
charge
during
operation,
go
to
″
Checking
operational
charging.
″
To
check
the
ac
adapter,
do
the
following:
1.
Unplug
the
ac
adapter
cable
from
the
computer.
2.
Measure
the
output
voltage
at
the
plug
of
the
ac
adapter
cable.
See
the
following
figure:
2
1
(16 - 10 V)
Pin
Voltage
(V
dc)
1
+15.5
to
+17.0
2
Ground
3.
If
the
voltage
is
not
correct,
replace
the
ac
adapter.
4.
If
the
voltage
is
acceptable,
do
the
following:
v
Replace
the
system
board.
v
If
the
problem
persists,
go
to
“Product
overview”
on
page
47.
Note:
Noise
from
the
ac
adapter
does
not
always
indicate
a
defect.
Checkout
guide
42
MT
2668/2669/2686/2687
Summary of Contents for THINKPAD T43 -
Page 6: ...vi MT 2668 2669 2686 2687...
Page 8: ...2 MT 2668 2669 2686 2687...
Page 155: ...5 4 Removing and replacing a FRU ThinkPad T43 T43p Series 149...
Page 157: ...3 2 Removing and replacing a FRU ThinkPad T43 T43p Series 151...
Page 172: ...b 4 4 c 5 5 continued Removing and replacing a FRU 166 MT 2668 2669 2686 2687...
Page 187: ...1 2 3 4 5 6 7 8 9 16 10 12 13 14 15 19 17 18 11 Locations ThinkPad T43 T43p Series 181...
Page 206: ...14 1 in LCD FRUs 1 b a 2 c d e 3 6 7 8 5 4 Parts list 200 MT 2668 2669 2686 2687...
Page 211: ...15 0 in LCD FRUs 1 2 5 3 6 7 8 4 Parts list ThinkPad T43 T43p Series 205...
Page 231: ...Notices ThinkPad T43 T43p Series 225...
Page 232: ...Part Number 27R0700 1P P N 27R0700...
