hi So today we're going to be going over
a MacBook Air that doesn't turn on we're
going to go over it from start to finish
so first thing that I'm finishing doing
here is just removing the main board
from the machine let's just make sure I
haven't forgotten anything here this is
an
82165 it's one of the newer models newer
2015 models here
1516 and it would help if the idiot took
all the screws out of the motherboard it
always helps when you're trying to you
know take a machine apart that you
actually remove all of its screws so
let's pull you
out put this
aside let's take a
look and see what we get
here
so it's plugged in has no light in the
charger now the first thing that we
check is pp3 v42 let's see what angle
does this look good at Define the angle
at which you can actually see the
multimeter is it here here okay here we
go that looks good for me so first thing
we need is PP 342 for the one wire
circuit I would suggest just looking at
my one wire circuit videos if you don't
know what the one wire circuit is it'll
make everything very
simple and the one wire circuit works on
pp3 v42 pp3 v42 is present now the next
thing that we're going to do is a basic
little inspection of the board try to
get an idea of what went where and
what's wrong with
it so follow me over to the microscope
will
you
so the first thing that we do here is we
look
through
and the first thing that we
do huh wrong mode first thing that we're
supposed to do here is check and see if
pp3 v42 is
present so let's see if we have
that
not 3.42 but that's close
enough so now that we know that we have
3.42 volts let's just look for a hint on
the
board it's interesting this so tell me
if you see anything as I move it's
interesting this uh this this I I don't
know whether to call them a couple or
one of those you know modern I think I'm
a couple I don't really want to Define
my relationship [ __ ] um things but
yeah so this guy comes he wants to leave
something off and um you know the not
girlfriend I guess is
there now you see
this see that [ __ ] quality
manufacturing look at this what what is
this [ __ ] this is the crap I expect when
I when I [ __ ] saw her a chip myself
what what is this [ __ ] get the f [ __ ]
app anyway so he he he comes in wants to
leave something
and aha liquid but take a note of
that and he's like I well I guess I
should give them your number since
you're the one who's going to be picking
it up and he's and he looks at her he
goes what's your number and I go and
then she just looks at him with this
terrible awkward look and this miserable
face and he doesn't pick up on why
that's wrong at all and I just I
couldn't help but laugh and then they
saw me laughing and then they left
without leaving the machine and it's
like
listen I mean I'm not going to laugh in
your face but yeah I am going to I am
going to smile at your stupidity if you
look at you know the person that you're
dating like that and man okay so we got
to this this is off here so I'm going to
have to place that back in a
place what the okay this this is this is
nasty
looking and pp3 v42 area is nasty
looking even though though pp3 v42 works
now we go to the other side of the board
that looks disgusting we'll look up what
that is my oh that looks gross we'll
have to see what that
is nasty nasty nasty so we have a lot of
General nastiness
here kind of curious what a lot of this
stuff does let's open up the board View
and the schematic and take a
look
you know what's [ __ ] up is I still
actually remember the phone numbers of
almost every girl I've ever won out with
like I'm going through them in my head
right now and I they're actually they're
still there I mean don't get me wrong I
don't want them to be there I would like
I've deleted them from my phone it would
be nice if they could you know five
years later be deleted from my brain but
I still know their numbers and it's not
even like I text them or I call them or
I communicate with them I mean I haven't
you know talked to most of them since
soon after I stopped seeing them but I
still remember the numbers it's just so
I don't get it like what the
[ __ ] I guess it's it's me I'm missing
something so now the the nastiest [ __ ]
that I saw was was the right around down
here so what is this stuff for
beon could give two shits less about
beon beon current sensing could give to
cso current sensing charger okay I don't
I don't give a [ __ ] about this okay
that's that's not going to cause my lack
of green light just yet and oh that SMC
area looks nasty take a look at that oh
[ __ ] that all right so let's just go
with a slight Reflow of a bunch of these
areas and touching up some things and go
from
there and of course a little a little
bit of jizz by the chip responsible for
pp5
es5 so we're just going to go with
cleaning up all the jizz and see what it
looks like from there
get the air filter
on
hello
let's go down the rest of the the the of
the
board get
down
[Music]
flow that resistor back into
place
[Music]
e
[Music]
created some solder blobs to match
apples
[Music]
we going to wind up replacing that thing
anyway
[Music]
so okay and also SMC
[Music]
area let's get rid of that edge
[Music]
bonding
[Music]
e
[Music]
okay
[Music]
e
[Music]
e
okay
finally okay now I got to put that
resistor back in place by the LCD
connector
area
huh there's no resistor out of place by
the LCD connector
area that's
odd that was definitely out of
place any
luck quick
luck nah no dice
yet all righty then time to check for
something like SMC reset
l and see if we get
anything now SMC reset L it's going to
be what tells the SMC it's okay for it
to turn on now that's going to be on pin
five of U
5110 which is going to
be somewhere up here I'll will find it
momentarily ah okay
yeah
no SMC reset
l
so next thing here this chip requires
3.42 volts to operat let's see if the
pp3 v42 rail is
present and a pp3 v42 is present now is
pp3 v42 making its way into the
chip it
is let's see if the SMC area has has any
corrosion SMC area has no corrosion
here and let's check SMC reset L to see
if SMC reset L is coming
out it isn't so at this point let's try
replacing as the chip responsible for
the SMC
reset we're going to take this old one
off of the board
remember the SMC is what's going to talk
to the charger and the SMC is what's
going to allow the SM uh the charger to
have a green light and turn
on
[Music]
Apple's not the only one that gets to
create little solder
balls equal opportunity
balls
[Music]
that's not SED on properly
but who this oh
well a light no
light okay then let's continue here is
SMC reset L
there no it's
not and we know from previous videos
that means the SMC is probably pulling
it
down or r5100 is bad where is
r5100 r5100 is a pull-up
resistor that's going to allow that
signal to be where it is so let show you
what I mean by that so r5100 is going to
pull up SMC reset L unless the SMC or
this chip pull it down so r5100 is
sitting between 3.42 volts in here so
r5100
[Music]
is in the middle up
here piece of
[ __ ] okay there's 3.42 volts there and
I'm pretty sure when I measure it I'm
going to see the 100 kilohms that this
SCH schematic is telling me I'm supposed
to be getting
here close enough [ __ ] piece of [ __ ]
okay so that means the SMC is
bad will
boo want balling
SMC man
[ __ ]
[ __ ] I don't care if I burn this one
because it's bad here [ __ ] you come off
my
board get get the [ __ ] off of my
board
for
[Music]
for
oh I hate this
part this entire process is just meant
for a factory worker that makes a dollar
a
day
I know there are things that are going
to suck about every job but I don't know
I just hate this
[Music]
one
overall here pick up all the lead free
solder there's going to be a couple of
these that look like they're ripped pads
but they're actually not it's
just just remember every time you see
something that you think is [ __ ] up
ask yourself is that actually [ __ ] up
or is there an an apple engineer that's
trolling me and I I know I I I know in
my heart that it has to be that the
Apple engineer is trolling me no really
they look for a company where it was you
know like what their pads look like on
their chips are they they they chose a
company where their pads without solder
on them actually look like ripped pads
rather than a pad just a [ __ ] with me
but no it's not going to work nice
try do you ever want to let the Apple
Engineers
win I'm telling you if you let the Apple
if you want the Apple Engineers to win
then it's about time for you to hit that
subscribe button until it turns into an
unsubscribe
button and just pack it in and
go cuz I sure as [ __ ] don't do all this
work teach you how to do all this stuff
so that you can let the Apple Engineers
win and they try they try real hard and
I know what you're going to be thinking
Louis no they don't Louis you're
paranoid you're making this up really
why is it that if you try to read the
firmware off of this chip that it erases
itself why tell me that cuz they have
flashers and readers for this chip why
is it that if I try to read the
information off of this chip that it
[ __ ] erases itself cuz there ain't no
top secret information here this is an
SMC system management controller this
does things like hey see the battery hey
charge the battery hey what temperature
is the CPU there ain't nothing
proprietary here there's nothing special
here there's no trade secrets here but
if you try to read that chip uh-uh
[ __ ] you better or not no way in
hell are you programming new chips no
you got to rip them off of liquid damag
dead motherboards and put 96 little
balls on it and hope that it works [ __ ]
you and people wonder I mean it why how
could you possibly have such a low
opinion of Apple how could you do this
job every day and not have a [ __ ] low
opinion of Apple I
mean really like how could you actually
put do this every single day and then go
home thinking I love Apple they were
great company that cares about their
users and the people who work on their
stuff I love no get the [ __ ] out of here
it's impossible to do this literally
impossible to do this job be
knowledgeable at this job while you're
doing it and like apple you just can't
you like you will realize the truth they
are [ __ ]
pranks I try to read the [ __ ] chip
that controls charging the battery it or
so that I can have that firmware so I
can place it on a new chip the chip
erases itself I mean like why explain to
me explain to me what the [ __ ] point
is to
this it's [ __ ] all right so now
we're going to clean out the
stencil still has balls in it from the
last
job it still has balls in it from the
last job oh man the comment section is
not going to forgive me for that
one
[Music]
okay
have
I know what most people are
thinking oh that's not properly aligned
there that's not perfectly aligned
you're not aligning and according to IPC
suck
my
you know what I would go to bet I would
bet that 99% of the people that
criticize my alignment of most of the
things I'm doing have never done
this I would say n a good 99% have never
actually tried this
before and I would say of that 99% that
never tried it before I would say less
than 1% of them would get it
[Music]
right or actually make something work
again
Okay
[Music]
so
okay even by my standards this is
probably the most warped stencil I've
ever
seen it would be nice if you could go to
Amazon Prime and just buy a
stencil can I have a stencil for an
a1466 SMC please thank you
that's good
enough I gotta hunt some guy down on
AliExpress gotta pray that after I pay
for it he actually ships it got to pray
that after I buy it and after he ships
it that it will get here in less than
three months and that by the time I've
get it w't forget that I ordered
it
nah can't just buy can't just buy them
and program them NOP that would make
life too
easy
okay that's
fine I'll get you back Apple I'll make
sure people around the world fix your
[ __ ] when they instead of buying new
ones make sure as many people as
possible know how to get around your
[ __ ] cuz that's the thing with
computers nowadays I mean there's not a
lot of compelling reason to buy new for
the average consumer [ __ ] is fast and
good and cool enough you
know Apple knows that these companies
know that they don't want you making the
old stuff work again the old stuff
breaking is pretty much the only new
Revenue stream that they're going to
have
[Music]
we have
balls I have
balls really badly aligned
balls yeah that was a joke compared to
some of my other SMC replacement videos
this one went really
poorly really poorly man all right let's
see how shitty this was let's get the
stencil
off come on under the chip
tweezers go
[Music]
under
okay okay that was pretty shitty that
was really shitty actually let's see if
what we can do with
this
I can save most of
these so a couple of them combined and
formed a big
ball no
biggie I'll just place a couple of these
manually and we'll be on our
[Music]
way
one
it's like counting sheep to go to
sleep one solder
[Music]
ball [ __ ] you solder
[Music]
ball good little solder ball
[Music]
oh worst SMC reballing video
ever bad solder
ball like I know my hands
suck but like this is a new level of
suck even for me
[Music]
like uh-uh
[Music]
no look at how they want to run away to
the wrong
path okay we're just about there
[Music]
uper
right
[Music]
e
[Music]
going to make a really clickbait title
for this video reballing gone
[Music]
sexual gone
[Music]
sexual be a view
[ __ ] be become the Nicole Arbor of
motherboard
[Music]
repair Nicole
[Music]
Arbor
[Music]
some balls are slightly bigger than
other
balls it's all going to kind of get
evened out when it gets on the board
though cuz the Chip is going to
sink you'll see how the chip sinks in a
place
my
[Music]
ball
what a dirty
[Music]
job my balls
just my balls just fell on my
[Music]
balls
e
[Music]
e
there we
go it's not in the place yet now we
going to make a
dance get in the place all those balls
even out drop on the board
properly and now cool it off now my hot
air station is shooting out cold
air
now we're going to cool the chip using
my rapid cool
technology once your finger gets warm
it's time for some fresh alcohol it's
rapid cool
[Music]
technology
[Music]
bam good stuff now obviously I I have a
lot of little things to replace
here because this board looks like [ __ ]
and even though it turns on there's so
many things on there that as I say in a
lot of these videos uh no does not
belong on my board because of how bad it
looks I'm not going to leave something
on there that has a brown rusted looking
Edge that's corroding that's completely
destroyed that's just not a nice thing
to do so what was wrong with this board
we had missing SMC reset L and that as
always was not the actual chip that
creates SMC reset L causing it even
though I always assume it's the chip CA
pausing it and it was yet again the
SMC and one thing to note that I do want
to test on here is I did use an SMC from
an 820-3437 on an
82165 or 4 board so we're going to see
if there's any negative consequences to
that if there are negative consequences
after the testing I will update
everybody in a later video you should
never assume that an SMC from one board
is going to work on another it's
something that is
um
H it's
uh so the issue with this is that SMC
reset L wound up being missing and we
had pp3 v42 pp3 v42 was here however
after we realized pp3 v42 is there and
that SMC reset out was missing once we
replaced the IC which looked like it had
wine on it for SMC reset L at that
point
that point at that point we can then
assume that the SMC is what is bringing
the signal down which is what's been
happening more and more often lately as
long as I'm putting something on camera
so we replace the SMC and it works the
SMC reballing did not go as planned
because I did not align the stencil as
well as I could have in addition not
only did I not align the stencil well
but that stencil now looks like a ramp
in Tony Hawk Pro Skater instead of being
flat so that's that for today I hope you
learned something and yeah that is it