General checkout
21
To
verify
a
symptom,
follow
the
steps
below:
1.
Turn
off
the
computer.
2.
Remove
the
battery
pack.
3.
Connect
the
AC
adapter.
4.
Make
sure
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.
Make
sure
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:
•
“Checking
the
IdeaTab
AC
Charger”
on
page 21
•
“Checking
the
internal
battery
status”
on
page 21
Checking the IdeaTab AC Charger
When
you
use
the
IdeaTab
AC
Charger
to
charge
the
tablet
but
no
power
is
charged,
see
the
instructions
in
this
topic
to
check
the
IdeaTab
AC
Charger.
To
check
the
IdeaTab
AC
Charger,
do
the
following:
1.
Disconnect
the
micro
‐
USB
cable
from
the
tablet.
2.
Measure
the
output
voltage
across
the
connector
marked
B
of
the
micro
‐
USB
cable.
Refer
to
the
following
figure:
Note:
The
output
voltage
across
pin
3
of
the
micro
‐
B
connector
might
be
different
from
the
one
you
are
servicing.
3.
If
the
voltage
is
not
correct,
replace
the
micro
‐
USB
cable.
4.
If
the
voltage
is
acceptable,
replace
the
system
board.
Checking the internal battery status
To
check
the
battery
status
of
the
tablet,
do
either
of
the
following:
•
Approximate information about the battery status
Get
the
approximate
status
of
the
battery
at
any
time
by
checking
the
battery
status
icon
on
the
system
bar
in
the
upper
‐
right
corner
of
the
screen.
The
shorter
the
green
bar
is,
the
less
the
battery
power
remains.
•
Accurate information about the battery status
To
get
the
accurate
information
about
the
battery
status
of
the
tablet,
do
the
following:
Power system checkout
Pin
Voltage (V dc)
1
Ground
2
0
3
+5
1 2
3 (5V)
