We usually find our ac adapter can not work, but we usually do not know why this question come out. But now you will know the reason well from this article.

1. Why
Laptop
HP
Smart
Adapter
Still
Can
Not
Work
After
Replacing
Battery
And
Adapter?
Laptop
ac
adapter
can
not
charge
for
your
laptop
to
perform?
Many
friend
around
me
encountered
this
problem.
"I’ve
replaced
both
battery
and
AC
Adapter,
but
why
it
still
could
not
charge?”
Maybe
you
are
one
of
those
who
are
complaining.
Broken
battery
and
AC
adapter
are
the
most
common
reason
while
there
is
another
one
that
most
people
would
neglect
:
Loose
or
Broken
DC
Power
Jack.
Symptoms
of
a
broken
DC
power
jack:
l The
laptop
only
operates
when
you
hold
the
DC
power
plug
in
a
certain
direction
(DC
jack
is
broken
or
loose).
l The
laptop
only
runs
on
battery
power
(no
power
is
getting
through
the
DC
jack).
l The
laptop
gets
no
power
at
all.
l The
laptop
will
not
charge
the
battery.
l The
laptop
switches
from
AC
power
to
battery
power
intermittently
due
to
a
loose
or
broken
power
jack.
l The
laptop
suddenly
shuts
off.
l The
DC
jack
may
feel
loose.
l Parks
come
out
of
the
back
of
the
laptop
when
you
insert
the
power
plug
into
the
DC
jack.
How
some
repair
centers
handle
DC
jack
repair:
Most
service
centers
don’t
want
to
deal
with
this
problem
by
attempting
to
repair
the
DC
jack.
Many,
including
the
large
nationwide
stores
and
the
laptop’s
manufacturer,
will
either
tell
you
the
machine
is
not
repairable
or
that
they
will
need
to
replace
the
motherboard.
These
quotes
usually
run
from
$250
to
as
much
as
$800.
They
choose
to
ignore
the
fact
that
a
broken
DC
power
jack
can
be
repaired
without
a
motherboard
replacement
because
they
are
not
equipped
with
the
tools
or
training
to
do
DC
power
jack
repair
on
your
laptop.
How
a
DC
jack
breaks:
l The
HP
Smart
Adapter
jack
on
most
models
of
laptops
do
not
have
enough
reinforcement
within
the
structure
of
the
casing
and
motherboard
to
handle
the
stress
caused
by
movement
of
the
power
plug.
l Some
DC
jacks
simply
fail
under
normal
operation
of
your
computer.
After
a
year
or
two
of
usage,
parts
just
come
loose
on
certain
models.
l Sometimes
the
laptop
gets
dropped
and
the
plug
jerks
the
DC
jack
loose.
l People,
pets
and
vacuum
cleaners
trip
over
laptop
power
cords
and
break
the
DC
power
jack.
l The
laptop
is
moved
around
a
lot.
After
the
DC
jack
is
moved
back
and
forth
enough
times,
it
comes
loose.
l In
some
cases
the
DC
jack
was
not
soldered
onto
the
motherboard
well
by
the
manufacturer.

2.
Source
of
HP
Smart
Adapter:
http://www.chargerbuy.com/laptop-­‐ac-­‐adapter/hp-­‐ac-­‐adapters.html
Picture
of
HP
Smart
Adapter: