Checking the ac adapter, Checking operational charging, Checking the battery pack – Lenovo 3000 N200 Notebook User Manual

Page 33: Checking, Adapter, Operational, Charging, Battery, Pack

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Checking

the

ac

adapter

You

are

here

because

the

computer

fails

only

when

the

ac

adapter

is

used.

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:

1

2

3

(20V)

Pin

Voltage

(V

dc)

1

+20

2

0

3

Ground

Note:

Output

voltage

of

pin

no.2

of

the

ac

adapter

may

be

different

from

the

one

you

are

servicing.

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

30.

Note:

Noise

from

the

ac

adapter

does

not

always

indicate

a

defect.

Checking

operational

charging

To

check

whether

the

battery

charges

properly

during

operation,

use

a

discharged

battery

pack

or

a

battery

pack

that

has

less

than

50%

of

the

total

power

remaining

when

installed

in

the

computer.

Perform

operational

charging.

If

the

battery

status

indicator

or

icon

does

not

turn

on,

remove

the

battery

pack

and

let

it

return

to

room

temperature.

Reinstall

the

battery

pack.

If

the

charge

indicator

or

icon

still

does

not

turn

on,

replace

the

battery

pack.

If

the

charge

indicator

still

does

not

turn

on,

replace

the

system

board.

Then

reinstall

the

battery

pack.

If

it

is

still

not

charged,

go

to

the

next

section.

Checking

the

battery

pack

Battery

charging

does

not

start

until

the

Power

Meter

shows

that

less

than

95%

of

the

total

power

remains;

under

this

condition

the

battery

pack

can

charge

to

100%

of

its

capacity.

This

protects

the

battery

pack

from

being

overcharged

or

from

having

a

shortened

life.

To

check

your

battery,

move

your

cursor

to

the

Power

Meter

icon

in

the

icon

tray

of

the

Windows

taskbar

and

wait

for

a

moment

(but

do

not

click),

and

the

percentage

of

battery

power

remaining

is

displayed.

To

get

detailed

information

about

the

battery,

double-click

the

Power

Meter

icon.

Checkout

guide

General

descriptions

27