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- เผยแพร่เมื่อ 8 ส.ค. 2018
- MacBook Pro that decided to simple not turn on one morning. Had to do some short-circuit hunting by injecting voltage on PPBUS_G3_H.
This was actually my first time successfully locating a short with this method, so pretty chuffed about that.
_
Thanks to music bros down below!
Synthis - / samsynthis
Counterwise - / xdcorndogxd
Ertrii - / ertrii - วิทยาศาสตร์และเทคโนโลยี
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Awesome, another channel to watch, I recently started to repair Macbook Pros, have had some success so far, but have a lot to learn yet.
This was a very nice example of dividing the board into regions and troubleshooting the source and destination, very informative
that just gave me enough confidence to try this method on my own 820-3330b tomorrow... Also charges but no power up. Hopefully is going to be a bad cap too... ;) Thanks, your channel is one of the best so far... Very good explanations and no clutter, just perfect!
Nice one. I have a 2009 Macbook pro that doesn't light up so now I can learn all about these shenanigans. Thanks for the great hands-on video
Congratz!!! First Time i see you use thats technique
Video of the year....so wonderful
Another great video. Thank you.
With this excellent repair you showed why I admire you: young Graham (11:55 ‒ 12:55) looked great when he detected that fault without the help of a thermal camera (12:16 exact). Of course I read your description but it does not detract from it by expressing my sincere congratulations. A respectful greeting from Mexico.
What a lovely comment! I hope Graham sees it. 😄
@@221b-Maker-Street Thank you. You are very kind. All the best.
Great video. Great tutorial. Kudos!!!
Superb video and very informative.
nice presentation ,thank you
You are a Master Sir !
Great video!
As usual a very clear & concise presentation.
What do you think about diode mode for short testing?
Louis Rossmann would be proud ! :D
with no flux used?
I found your channel you are legend mate
Yoo. I'm soo greatfull to get to know yo account. I'm from Africa, Tanzania. Your a gr8 teacher. I keep you in my prayers.
Excellent presentation! Where do you get all those circuit diagrams from though? They're indispensable for this sort of work, aren't they?
Awesome Video! What power supply did you use to inject the voltage?
"You getting robbed." 🤣🤣
Just discovering this channel - I watched two vids and you have a very different way to get at things. I saw you were using alcohol - it is a rudimentary way maybe but not everyone can afford a FLIR and this works too. I was very surprised you located the short in a cap. I will watch a couple more, never too old to learn. I just opened a MBP 2012 for the first time (Madonna / like a virgin playing in the background) - the dust bunnies inside but everything still like new inside, not a drop of liquid damage. DVD was not working, took it out, opened it up and found something in there... why would someone put a thin mint in there.... anyways I am not ready for logic board repairs, leave that to the real magicians like you.
Great video as always! Could you make a video based on the PSU & injecting voltage technique, PLEASE!
I've had a few requests for this, so I'll try and put something together!
You've got the talent, you really need a thermal camera.
thanks for sharing.
Just repaired mine... thanks man
I'm thinking one of those laser temperature testers would be very useful in trying to find these shorts
thanx sir very nice job
Bravo brother
great video
Great tutorial. One question, I wonder, Doesn't it short the components if we spray IPA while we are injecting power to find out the short circuits.
Well thanks 😊 again....
Awesome
Thank you for this amazing video. You are so knowledgeable! I have a MacBook pro-2010 that shuts down for days and then turns on. I changed the battery, made all the resets and nothing changed. It just randomly turns on after days. Could you help me out diagnose the issue? I'm in the USA.
Hi, I've a macbook pro logic board with the green light on magsafe but no charge, no fan spin, no power.
The strange problem that I can see is the ppbusg3hot floating from 12,46V to 2,2V to 0V then another time 12,46V to 2,2V to 0V and another and another....
I've changed the U7000 but the problem isn't resolved.
Can you help me? It's 4 mounths that I analize this logic without find a solutions.
Thanks
I want to ask about the position of this capacitor on board macbook mid 2012 because its look different
Best regards
Nice brother
Bro may I suggest to use a ESR tester to test the components if it is the right value....
Then use a small tip soldering iron..or make a special soldering to solder or unsolder the smd components like resistors capacitors..
Nice job bro!!
Good advice! I have both of these things today, but at the time of this video I was still on my most basic tool set!
Great video man, just a quick question: how to define the voltage(1 or 5 or less or mpre) while injecting because in one of ur videos u used 5v and now u used 1v? Thanks in advance.
basically, it doesn't matter. Just you have to be sure about the voltage level of the powerline. With 1V you cant damage basically nothing. CPU operates at 0.8V, so it means a bit of stress but can stay alive after 1V. But after 5V injection, it is gone. And about the current. You want to find a short, not to damage the trace. Trace can bear some current depends on the width. But you can also burn a trace if the current will be so high. Thats the reason why he starts with 1A and slowly uprasing. What you are interested in is power consumption of the short. 1W is sometimes hard to notice by hand but 3W raging. If you have for example 1ohm resistor and you apply 1V, you will get 1W power loss. with 3 1ohm resistor in parallel you will get 3W of power loss (1V from power supply). You can easily try at home.
Thanks for sharing the knowledge. Why you don’t use a thermal camera which will make finding a shorted component much easier and faster?
I do these days! Switched over to a thermal cam late last year and it absolutely changed my world. Definitely one of those tools that I'd now consider a must-have.
Yes, my older videos show that you can find shorts by hand, but good grief the therm cam makes a 1hr search into a 10 second search.
What is the program you are using to search the diagram of the board?
Sir,
Your method of working is interested so much thank you.
Nice
I have problem with no picture on laptop. On laptop matherboard I found that ISL6262 (near to graphics chip) is a two-phase buck converter regulator it heating like mad, that regulator is heting because somewhere after him is short circuit, or it is normal to heat ?
ISL chips are common fail points on these boards. They should not heat up.
Peepee bus should be a meme by now
I would love to see Louis Rossmann review this vid
Brother what tool this one tell me please
I have a flashing question mark issue on my MacBook Pro screen.
Obviously with the option keyboard button, I tried to turn on my MacBook Pro and then after a successful ignition, I only see the mouse on my screen and then I don’t see any more symbols to continue the installation program.
I mean it’s just the mouse on my screen.
Please help me out!
Help me please. how to download diagram for macbook? thank you
i also fix computers which they bring me sometimes and im thinkin bout buyin thermal cam bcs this technique takes time to find out short.
Great tutorials, you really have time for computers. I have a MacBook pro 2017 13", running High Sierra. It won't turn on after shutdown or after closing the head. But if you close the head for about 6 hours and open again then it turned on. Kindly help me fix that, counting on your help, thanks.
9:28 where you hook the yellow cable? how we know where to hock for voltage injecting ?
That was onto PPBUS_G3H, the main power rail on these MacBook Pro boards.
Can you still get donor boards from aliexpress? Thanks 🤓
have you considered using a thermal camera for work like this? or is the cost not worth it?
I did think they were far too expensive, but you can find older models for around $200 now I think... so I'm starting to eye them up!
how come he didnt check continuity on the first fuse? isnt the fuse there to protect the sensitive circuits after? if you remove the fuse without confirming theres more than the expected 12v before it i guess that makes sense?
my macbook overheating and not power on... intel southbridge.. wwhat will be the posible problem..
hey man you may use thermal camera or freeze spray
warning, do not have a drinking game for everytime he sais "PPBUS_G3_H"
Bro how can i get that board view software u r using?
openboardview.org/
You'll need the board view files/schematics. I can't provide links for these, but if you google search the logic board number you're looking for with schematic, eg "820-2915 schematic" there will be results that will lead to free downloads. Forums are the good resource. You may need to register an account at said forum.
What the practice board is for? or how you practice on it?
Hi
I have a problem with my MacBook. Only the fun works when I turn it on. Can you plz help me with this?
what boardview model is it sir?
why don't you use a thermal cam do find the hot component?
What year is this model
SO THAT THE SECOND CONNECTOR THAT IS NEAR THE FAN, THE METAL CONNECTION
Nice video. I am a 73 years old electronics engineer, would like to repair my nephew's MacBook pro.
Charger is not charging , tried 16.5 volts bench power source but still not working.
Can I get the diagram software which you are using?
Please help. Thank you.
How to learn all about the stuff? Thanks
Is it okay to leave a cap off if it's not marked critical in the schematics. I'm guessing the ones on v-core need to be replaced, because the cpu is very important and sensitive. I fixed a few logic boards by removing fuse and plugging battery in, then the cap blows up. Probably a stupid way to do it! Do you think using battery is too risky? I could blow cpu, right? I want to get power supply and do it your way from now on, so I don't blow something important.
A little risky, but at the end of the day, if there's a short circuit then that's where all the power will go to. A bench PSU just gives you more control.
As for leaving the cap off, it's hard to tell. Bypass caps do two jobs, one is to smooth out the power and reduce noise, the other is to provide an energy reserve to nearby chips so they can switch on faster.
A big cap like this one will be the latter, and you might find that the device crashes under certain loads without it. That being said, as there's two of them there, you might get away with it.
what boardview # is this sir?is it 820-2915 or 820-3415?
Hello friend, the macbook that you fixed in the video is mid2012 A1278 ?. If so, could you help me? I have been learning how to make these arrangements in a self-taught way and I found the "diagrams" / "planes" you use very useful. What are they? Can you send them to me? How do I contact you? Greetings from Chile!
@@Adamant_IT What do you mean with "directly"? could you send them to me by mail?. I would be very gratefull :( i have a short circuit with my mac that i mentioned in the other comment and i really need it
@@Adamant_IT Ah i understand. There is some way to legally get it?
How do you decide were to inject voltage?
My macbook charge light blue on and off and macbook don't come on y?
Is it fairly easy to get schematics for MB's?
For Apple computers, a simple Bing search will do the job... other computers maybe not so much.
Where are You get schematics ? For every laptop i've got to repair , I didn't had schematics ... I can't find any that I need . Do you buy them and where ? Get on forums ? Some websites ? Thanks
Google for the motherboard model number and schematic, eg "820-3415 schematic"
Lots of forums around that are free to register on and obtain schematics.
@@Adamant_IT Much appreciated response. Very kind of you. All the best.
@adamant it what kind of reflow heat gun do you use? is there a cheaper one you recommend?
I have a WEP 2-in-1 862D+, but I don't recommend it these days as the soldering iron on it isn't very good for SMD work.
Lots of cheap hot-air stations have basically the same hot-air section though, such as this one (associate links): [US] amzn.to/3i3lk4N - [UK] amzn.to/2YEk80p
@@Adamant_IT thank you for your reply I love your channel just seeing your evolution in the last 4 years is very cool I was going to get a Weller that Louis rossmann recommended in one of his videos but it's a little too expensive I'm not worried about the soldering iron as much as the hot air station
Yea. The Quick 861DW that Louis uses seems to be the best bang for buck hot air station you can get, but it's still a few hundred, which can be daunting for someone who's starting out. I think it's reasonable to start with a cheap station and then upgrade later once you have some experience with it.
Pleas i want aske you about the liqued what it this ? Water or what ? Thanks so muche i love your chanal and your videos ther are a lot of the useful information .👍👍👍👍
isopropyl alcohol
Hey it's Talos
You should have a Infrarot Camera on your iPhone ;-)
What sources of fluids are you using on this motherboard?
Adamant IT .thank u..
99% alcohol
Hi, I don't get how removing a fuse gets the Inductor from 0.88v back to 12.65, can someone explain
The fuse he removed was the fuse to the output of the G3H power supply circuit. This isolated the power supply circuit from the output circuit where everything else are. 2 possible outcomes: if the voltage didn't normalize the issue is within the G3H input circuit, but it did which means that the short was on the output side. Notice that the Yellow (+) wire was soldered to the output side of the board fuse connector. This replaced the G3H power circuit (that we now know is good) with the bench power supply for voltage injection.
@@eustacehendrix9659 Thank you very much for clearing up that doubt and I say it with total honesty. All the best.
What sort of Money would a repair like that cost buddy?
hope you can help me.1st of all im blonde and know nothing.haha. the charger of my mac,the piece which connects to macbook broke.so what i did was tried to put the 2 wires of the chrge into the mac.there was a little bank and bit of smoe came out.i bought new charger but nothing.i was told fuse has broken,then told mac not have fuse.apple want 150 bucks to repair.any ideas,thank you soo much.suzanne
sir,how much voltage did you inject?thanks
1v 3amp is a good guideline. When you switch on the power, the volts should drop, because it is a short circuit. The amps should go up to the set value, and that will create heat somewhere.
Good job
Why the title is VRM Short? It should be capacitor short. Misleading.
What capacitor did you used for MacBook Pro Mid 2010?
Not sure of the value on this one by heart, I was using parts from a donor board, so I could salvage a cap with the same codes on it.
Hmm i don't even have those
820=2567 board mein voltage nahin
Cuanto voltio se le entruduce al bord
1Voltio y la fuente preparada previamente para entregar 3 Amperios
wow this is the fattest revival board ... i have seen congrats
ok
Take a look at Louis rossmans channel!!
You are awsome, I have a macbook pro with the same issue, wish to have your skills though.
30 percent of my like videos Comes from this chanel
@Good Electronics: Although I have seen other creators on YT, this is my favorite (my first choice of consultation because I have learned thanks to the simple, clear and easy-to-understand explanations). All the best.
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