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Hey guys! How are you? Edgar here greeting you all once again with a new video
happy to welcome you all
whenever I make a video I am always happy
because that's what I like, to share and learn and all
today we have a phone that was left with me, an XS MAX
our friend Brandon sends us this phone
this phone
this phone has many problems, first, it's very slow
you may notice that when I slide the screen, it seems to have a delay
that's one thing, look, if I move it very fast the phone delays, well, that's one thing
the other problem is that, after 3 or 4 minutes, the phone restarts
this is something that we have talked many times, many people ask me, and I always say
you must be very careful to not make mistakes
don't make mistakes
Why? Because
We could have a phone that restarts and we start removing components
removing a lot of things and it turned out to be something very simple
let's put this phone here
if you have noticed it has already restarted
there it is restarting
let's put a stopwatch
let's type "Clock"
Ok, there it turned on, let's put the stopwatch
let's see how long it takes to restart
let's open a browser, a new window
look how slow it is, believe me, it's very very slow
nothing works properly
about 25 seconds have passed and the phone still doesn't know if it is going to open the browser
it's very slow
here our friend Flux has come to say hi
say hi to the camera, Flux
let's diagnose the phone with Flux accompanying us
no, not kisses
49 seconds and there it just opened the channel of EdgarYoReparo
and started, one minute
ok, it took about 2 minutes with 48 seconds
if you saw, the phone restarts
Now
let's connect it to the computer, let's bring the cable
and connect it
let's go to the PC and open 3uTools
here where it says Toolbox, there is a section called...
let me see if I can find it
I always forget where it is
it says, before the phone restarts
here in "Crash analysis"
we're going to click it, the phone is still on
it says it has 39 errors, and all of them are Crash code
Panic CPU caller, it says it has a problem connecting with the CPU and peripherals
if you notice, all the errors that appear are due to the same error
the same error says that one of it's peripherals
is not working well
the phone just restarted, if we see it here
Oh, it didn't restarted, it just stopped recognizing the USB cable
stopped recognizing the USB cable just like that?
that's weird, isn't it?
but the 39 errors say that one of it's peripherals is not working properly
Now
what's the problem with this?
in previous models, for example from iPhone 7 backwards
we could disconnect peripherals one by one, there was no problem with that
we could disconnect Charge flex, disconnect all those there was no problem
if the Charge flex was the problem, he phone simply stops having the problem
if we disconnect the peripheral that at the time caused the problem
now, from iPhone X onwards, that's different
we cannot simply
disconnect the peripheral and wait to see if that was the problem
it's difficult to find it, of course, it can be any peripheral
in this case, the iPhone XS MAX has a very very common problem
it is due the Charge flex
I have told that to many colleagues, let's see what is the problem that we are going to have here
this phone hasn't turned off
but if we see here
and disconnect the Charge flex
ok, there I disconnected it
let's disconnect the battery
reconnect the battery and turn it on
let's wait, there it is turning on, with the flex disconnected
here you can see it is not connected
so, let's put it there
and put again the stopwatch
and let's see if it can work properly with the flex disconnected
there it is
let's open the same page
let's start the stopwatch
with the flex disconnected
let's wait for it to load and let's wait once more for about 3 minutes and see if it restarts again
ok, it restarted again
even with the Charge flex disconnected, so
now we have a problem as a technician because we cannot disconnect all the peripherals
they all have to be present because the processor calls them all
if we go to the ZXW
we are in the connector of the J6400, which is the connector of the Charge flex
and we can see that there are some lines, these are I2C lines, ok? these are I2C1 Lines
if they are not present
they are going to give this type of conflict
if we notice, these line
are the same lines that connects with J3500
these lines, if I flip the board
they go to the CPU and then go to this one
which would be an amplifier
this would be an amplifier and this one too
So
in the connector J6400 we have some I2C lines
what else we can see here? I think only the I2C1
in other models, we have I2S lines, but those are for audio, but I think the problem is more about the I2C1 lines
in other phones, for example, in iPhone 7
I did a study on what I2C turns off the phone
and I2C1 was one of them
which, when in conflict, caused the phone to not turn on
so, it could be in these cases, if the I2C isn't working properly
when it is called and has a conflict, or there is a peripheral not connected
it will say "No, I'm not working" and it will give us this problem
Now, let's see this and I'll bring this
here I have a flex from another phone
from this over here, now we're going to
let's disconnect the display
I'll disconnect the Face ID cable
and now I'll connect this flex, but from above
like this, here
there I connected it
I'm connecting the Charge flex from this phone, this is a different phone that I had
now I'll connect the display, carefully
I'm connecting the display
and here I'm going to connect the Face ID, the Earphone flex, I connected the battery
now I have to press the Power button, but it is on the other side
so...
I'll turn it on with a cable
remember that now it has the Charge flex from this other phone, not it's own
the phone is now turning on, I'll disconnect the cable
let's wait for this to turn on
there it is
the phone works much faster
if I go to YouTube, let's wait for it to connect to Wi-Fi
you may notice that this works much faster
there we have it, so now let's
restart the stopwatch and start it again and give it...
it restarted after about 3 minutes
let's give it...
well, let's just wait and see if it restarts again
in the meantime, I'll drink my coffee
more than 5 minutes have passed and the phone still hasn't restarted
it has been about 6 minutes and it still has not restarted
so, we just diagnosed the phone without removing the board or components
without connecting it to the Power Supply, nothing right?
I always try to say this to my students
always distrust peripherals, always, a peripheral can give you some crazy failures that you can not imagine
I've had crazy failures because of a peripheral, whether it's a camera or a Charge flex
many things that
a simple peripheral can give you
You can have an iPhone 7 without signal
without IMEI, and it can be a Charge port
that can happen, you can have a phone that won't turn on and it could be because a rear camera
many things
don't just distrust 1 time
For example, if this hadn't worked with that flex, you know what I would have done?
I get another flex and connect it to the phone
I always test with 2 or 3 peripherals because
these years I have seen many crazy failures
that because of one peripheral we can make many mistakes
we only put an original Charge flex to this phone and it worked without problems
So, conclusion of this video or a tip that I can give you if you're repairing is
Never ever rely on peripherals, always have complete phones in your workshop
displays, cameras, batteries that you know work
and test them on the devices you are repairing
So, gentlemen, it was a great pleasure
to bring you a new contribution, a new video
and something I wanted to say, Subscribe to the channel, leave your like and your comments below
What crazy failure you've had because of a peripheral?
I'll read you
we'll see you in the next video