How are you guys? How's your day?
I changed my greeting today
How are you my friends? Welcome to a new video
in this video we're going to se this phone that
where's the note of this...
iPhone 7 without signal
let's learn how to correctly diagnose this phone
let's put this aside because we have another phone
I'm going to bring a magnetic tray and start disassembling this phone
so we can see
what problem we have, it is important that we analyze it very well first
watch and say "this is not for me"
where did I left my-- I'm losing everything today!
I just ordered today
But... here it is
these are typical iPhone 7 problems
no signal, especially if it is
Qualcomm model
this phone has been previously opened
someone has already opened it
let's disassemble it
ok, look at this phone, I thought someone had already opened it but it's not the case
but look at this, is like this phone
is heating up from this part
look, I removed this very easily
this cannot be removed so easily
let's continue disassembling
and let's see what we can find
I have not even tested if the phone turns on
honestly
this phone has never been disassembled, nobody has touched it
and these are the phone that are repaired the most of the times
or at least we can have a more specific diagnosis because they are phones that are not so tapped
first let's turn on the phone, because I don't know
if this phone turns on or not, or what it does
I haven't tested it yet, and it's very important that we test it
so, the phone is turning on
let's turn it on
is finishing turning on
ok, now is on, here we have the problem of "No service"
it means it has been already update, ok so let's
see if this is Intel or Qualcomm
to proceed in different ways
this is Qualcomm
I'll show you how I know it's a Qualcomm
let's see it under the microscope and on the PMU it says Qualcomm
so, when you have one of these--
I don't know what this is, what the hell is this? First time I see it
how weird
when you have a phone
a Qualcomm, the first thing you have to do is
you have to measure--
looks like residue of something on this phone, it looks like it has been touched
this is flux
look, this phone has...
flux residues
it's very weird
well, whenever you have such a phone, you have to look for short circuits
we have to look for shorts or leaks
I'm looking for shorts
Ok, found it
this cannot be repaired :(
here we have the short circuit
short
short, ok?
this line is not that shorted because it has 1.3 ohms
if we see it's voltage drop in diode mode
0.005 and 0.002
what will be its value in Ohms?
2
and 0.5
it is leaking
this is a common line
this line that we can see here it's leaking
ok? it's leaking
almost a short! But this is more a short than a leak, now let's see
this line, I'm not moving from here
so, is this line
and let's see iPhone 7 Qualcomm
here, and we'll see the typical line, this is a typical line
that goes to short, and is this one
ok the 1V line
this line is important because it is necessary for the activation of the Baseband
it is leaking, it is not totally in short
So, what we're going to try to do is bring a line, let's see if we can make a jumper to this one
from 1.1 SDRAM
and inject it here
look what are we going to do, we'll bring another line of 1.1 SDRAM
put a resistor in between
and we'll see if we can take that line
and see if we can activate, in this case the Baseband
because if we load software, the Baseband will not activate
We've already seen that this line is leaking
ok then, let's do that
it looks like this phone was heated or heated itself, something happened, just look
it looks like this phone overheated, I don't know, this phone is weird, very weird
Ok, so let's get to work and measure
let's apply... where's the flux?
Well, my dog is outside but
I'm talking about this flux
ok, done
now I need a resistor
we will bring a small resistor
Ok I'll take this resistor, I thinkg it's small
this is about 60 ohms or something
I don't remember, but it is small
there it is
there I have it
Okay, there's the resistor
now let's bring the wire
remember, it must be enameled wire
Ok, now I have to
put this here and this way
we will give it...
one volt to our...
line, that it is important to be there for activation
there it is, just like this
easy, easy
Ok, now what do we do?
We have to load the software to the phone because this is updated, so let's move on here
let's put
this here
it heats up by itself or someone heated it up, either one of these options
I don't know if it has charge, I think not
I think it has no charge, no it doesn't
let's see if we can do it with
this
done
Now I'll bring my Magic Keyboard to put it in recovery mode
ok now it's in recovery mode
Now I'm going to
plug this
there, and connect it to my
here to my computer and open 3uTools
and click on "Go Flash" how good we already have it, "Go Flash"
cross fingers and let's see if this can be fixed or not
watch this
here
Baseband was not accepted
Baseband Error, Baseband Error, Baseband Error, Baseband Error
our jumper simply
didn't work at all
our Baseband is still in short, if we go to the ZXW
the line in short circuit is literally this one
it could be this one or the Baseband
99% of the time
that I've found this fault
is always our dear Baseband that is damaged
so, let's wait for this to finish, simply to see
the Baseband wasn't accepted, here it clearly states
here it is literally saying all the Baseband errors, so this
is not going to work, this phone is impossible to repair
sadly there's nothing else we can do
absolutely nothing else, so
let's wait for it to finish and turn it on
Ok, done, now let's hope the computer recognizes it and we'll head to a particular section
to see that it just doesn't recognize the Baseband, the Baseband version, that means our phone
it's over
cheers for that phone that died in battle
I don't remove Baseband or PMU, as I told you, the 99.8% of the time that I've found this fault has been
due damaged Baseband, I've seen this fault for years
it detected it, here if we go to Details
we can see that... where's Baseband version?
I'm a little blind, I can't see
Baseband version...
Baseband version... here
sorry, here, it literally says "Unable to read data"
so, this phone doesn't recognize Baseband, this video will end here because this cannot be fixed
let's take a break, we have to take breaks too, we have to learn that
not all the phones have solution, not because the phone comes from other workshop you have to make an effort
I mean, we have to make an effort, of course, but you have to know when to say "that's enough"
What else I can do to this phone if I know that it's a damaged Baseband?
there is no solution to that, I've seen this fault for years
I've studied them, removed Baseband, measured them
and almost always is due a damaged Baseband, when I see exactly
this line in short circuit
this line in short
if you noticed I looked for this capacitor, because I know its more common for it to be shorted
there was a short, this cannot be fixed, we tried to inject voltage with a resistor and it didn't work
so that's it, I hope we always learn something
always take advantage to all the videos, for me is a big pleasure to come and greet you all
and it's too bad we couldn't fix this phone
take care and we'll see you
drums
in the next video
Bye!
I ran out of coffee :'(
In memory of...