A 2020 MacBook Air that Apple wanted £460 to FIX! - Can I Fix it?
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- čas přidán 5. 01. 2022
- Hi, in this video I attempt to fix an Apple MacBook Air from 2020. The model number A2179 EMC3302 and the board is a 820-01958-A.
I purchased this from eBay for £350. The original owner was quoted £460 from Apple for a repair, as it was claimed it was water damaged. I have never looked at this model before, so let's see if a non professional can fix it. Unlikely but I will give it a good go!!!!
Merch is here!!!!! www.puddlt.com/my-mate-vince
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If you have an interesting 'non returnable' item for a 'trying to fix' video then my PO box is:
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Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in this 'Trying to FIX' series. Many thanks, Vince. - Jak na to + styl
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Hope you all have a great 2022 everyone 👍👍👍
you too vince!
That vibration thing you feel is actually not vibaration, It's something to do about grounding. My uncle's razer laptop had that thing happening, than we change the UK to EU adapter to an expensive one that featured ground pin then the feeling went away. Basicly it's not vibrating the grounding is bad.
Not sure if you mentioned before, but which heat gun are you using?
You too!
Check out northridge fix on youtube he fixes many off these with no power
38:35 Capacitor popped, please check. Please upvote, so Vince can see it.
Yeah something almost certainly popped. It looked like the big chip below you could see the pop from the underneath on the left-hand side.
It did look like it failed. C7686
Yeah you could hear it and see the flux spit out on left side of that cap.
yup, that's gone
Ohhh right the big black one on the bottom let some gas out
PP3v3_G3H_RTC low or absent:
PP3v3_G3H_RTC powers the "brain" functionality of the CD3217 USB-C controllers which allows negotiation with the USB-C charger to allow 20 V. When PP3v3_G3H_RTC is shorted, low, or absent, this communication cannot take place, and the device will be stuck at 5 V. On the 820-01958, U6960 generates PP3v3_G3H_RTC. U6960 is a buck converter which lowers the voltage from PPBUS_G3H (≈12 V) to 3.3 V. Since PPBUS_G3H is the VIN (Voltage Input), we must get PPBUS_G3H before we get PP3v3_G3H_RTC.
•The most common reason for PP3v3_G3H_RTC to be missing or low, is a short to ground, usually on a capacitor around one of the CD3217s, or from a CD3217 itself.
•If PP3v3_G3H_RTC is not shorted, check for its enable signal, GHGR_EN_MVR. CHGR_EN_MVR is produced by the ISL9240 (U7000). The ISL9240 commonly fails in a way that prevents CHGR_EN_MVR from being produced. If the enable signal above is missing, replace the ISL9240 (U7000.)
•PP3v3_G3H_RTC can also be pulled low by PP3v3_UPC_T_LDO or PP3v3_UPC_X_LDO, so if you have no measurable short to ground, and your enable/VIN is present, check both the above rails for a short or low resistance to ground. Low resistance to ground/short on the above LDO lines will usually be caused by a bad CD3217.
--From repair.wiki/w/A2179_2020_MacBook_Air
This right here is one of the best,most helpful comments. Also the repair wiki should also be your first stop when learning. Less random trying various things and more trying to deduce by measuring. .... IMHO
I though Louis Rossman had an alter ego there. Ha ha.
So, am I the only one that giggled at 'PPbus'? "Damn you, PP bus!" lol.
The "vibration" you're feeling comes from the power supply which is floating compared to mains earth. If you swap out the 13A clip-on plug for one with a flex going to a 13A plug, you'll see that with the latter the earth pin connects to the metal stud in the power supply and the buzzing goes away. Apple used to include the 13A mains cord. Nowadays it's an expensive accessory.
ive had this when not grounded on powerbooks an aluminum macbooks from 2008
*vibrator
I have the same problem with a 3rd party charger
There were about 6 caps there which need replacing, a dull end cap is a sign that it is probably damaged, corrosion gets inside the cap which cracks it as the corrosion expands, it then shorts them out internally, it might not be bad now but I likely will go bad later.
I want to donate my body to Vince when I die .... I'm that confident I'd wake up on his blue mat with his multimeter stuck somewhere, while he claps loudly and say "yes!!" Over and over
Now that’s funny!!!!
if your body is anything like this macbook then probably not, he would have to try and buy another one of you to check voltages across the body. If he can't find any short on you then God help you, because you would end up with a reflow pipe stuck somewhere as well
@@saltydude07 wake up to a cold pipe slipping somewhere 🤣🤣🤣
@@adsjones1984 that is definitely one of those times you don't want to wake up with Vince clapping loudly shouting "Yes" over and over again
@@saltydude07 oh damn now you say it back to me it does sound so wrong 🤣
It's great to see the whole process and the frustrations Vince. Another great video. I personally enjoy the longer videos where you get sense of the difficulties in diagnosing such a, complicated board. Thanks for the time and effort you put in and to your viewers. There are some great comments and pointers offered up by your followers. Can't wait to see your reaction when you nail it and get carried round the living room by the kids...
The vibration is because your macbook charger is ungrounded, if you buy the grounded extension cable from Apple, it will get rid of the vibration. For some reason the plug they provide to attach on the charger does not have a proper earth pin.
I have the same thing on my 2015 mbp and like you said when you use the grounded extension cable it goes
For years I've rubbed the back of my hand across metal cased equipment as a quick test. A slight trembling sensation and it's definitely not earthed. Stray capacitance between mains live and your body. That situation won't hurt you but could damage sensitive components.
I get it from Apple TV 3 remote when it is on charge, also from an iPad Air (quite old) it did the same, didn’t matter if it was plugged in to wall charger or Mac USB port…
@@williamlogan1203 I got it when I plugged my phone into the USB output of my smart power strip. It was making the touch screen erratic. I ended up opening up the power strip and connecting the USB casings to the mains earth bar.
@@williamlogan1203 That's it! I've been trying to remember where I've had this before and it's my old 1st gen iPad Air
Hello Vince, You have a short on one of you're power rails , looking at the damage most probably on near U7650 , voltage is getting up close to 13V , I would check C7651, L7670 and L7690 for shorts
You LEGEND AR!!!! Just working on a Revisit video 👌👍👍👍👍👍
I was just about to say that! ;-)
charging ic for these machines dies all the time, big giveaway is the fact it is only pulling 5v, meaning the charging ic is not communicating with the charger to change the voltage to 20v. same as the 2017-2019 models, cd3217 i believe its called on the newer macbook airs, bga chip but not too bad to replace with a little patience.
Only 5V can also mean that the T2 firmware was corrupted by an update so it would have to be recovered using another Mac with Apple Configurator 2... When plugged into the other Mac, the "broken" MacBook will show up in DFU mode and can be recovered by clicking on the big square in which "DFU" stands to select it and then by clicking on the "Actions" button in the menu bar and then on the "Restore" button. After accepting that action, the software is recovering the OS and the T2 firmware and after some time, the MacBook will just boot and the software can freeze. In the video from Louis Rossmann I saw that plugging the charger into the "broken" device can help when an error appears. Because it's drawing 350 mA it seems that the power circuitry is fine
@@ende_ohne very true possibly a t2 issue, much less likely but definitely still a possibility.
@@ende_ohne This can work actually. If it shows in AC2
@@ende_ohne very likely. when big sur 11.2 i think came out my sisters t2 went ded so i had to fix it
I love the longer vids Vince. Thanks for the great content. Keep up the great work!!
At first I though I was going to get bored of so long videos but in the end they’re some of the ones I watch most 😂
Great video Vince. I wouldn't know where to start with one of these but it definitely looked like you're in the right ball park. One or both of those Mosfets or that IC are likely the culprit, but I bet it's frustrating without another one to know for sure! Look forward to the revisit! 👍
I think it is that damn ISL9240. Hoping the comments will fix this one Steve, I'd love to see it work again as it is in near perfect condition 👍👍👍
@@Mymatevince louis rossman probably has a vid covering it in his playlists
@@pogman15 Good idea to contact a fellow CZcamsr.. He is a professional at Apple products!
Never thought i'd see a MacBook repair video that didn't have ranting about New York City government, the real estate market, and right to repair
Or an e-bike, or the building landlord.
What you're feeling isn't an actual vibration, it's a small voltage current being created by a short to ground caused by the charger. It's the same concept as feeling it through one of those plasma globes.
Edit: It's normal for them to do that while plugged in. The Apple chargers are actually crap.
Yes. None of apple power bricks are properly grounded so sometimes you can feel 50Hz on your palm.
Glad to find this up top. I get the same on my Microsoft surface.
I get that feeling too on my macbook pro and one of my mac minis
@@johnboy4809 if your macbook comes with a magsafe charger use the long cord with a grounding pin
My working MacBook does that same thing. There are articles online which explain this as normal behavior.
Shorter videos get more views? Their loss. I like My Mate Vince raw and uncut. If you post a 2 hour video, I'll gleefully watch every minute. Keep on fixin', I'm having fun! No need to pander to the short-attention-span crowd. I wish you success in all your ventures (Especially your Rolls-Royce).
Vince is no longer the "Switch Killer."
He will now be known as the "Mac Slayer."
MacSlayer, the Scottish metal band.
Good stuff Vince. Great to see you having a go and looks like you started to feel your way around it. I haven’t tackled anything like that yet so hats off to you. Let’s hope someone can help. P.S that ultrasonic is a beast and knocks spots off my Lidl special. Cheers Graham
You always help me! Thanks My Mate Vince 😊
Hey Vince, tough luck on the fix but I hope you’ll have better luck in the future with it. Great vid all the same. Happy new year from Ireland!
Great video as always, my MacBook Air 2015 has that same feeling when the power is connected to it since the day I’ve had it. It’s the same feeling you get when you touch a plasma ball., people think I’m going mad when I tell them about it.
Awesome video, I have been absolutely transfixed by this series. You've come a long way since you were trying to fix a "Big-Trak"
wow, amazing amount of knowledge you have....love these videos, tnx for sharing
Your videos are always a joy, keep up the good work!!!
Hey vince .. i watch your videos and i really enjoying them .. i have problem with the work u know .. and you made my day thanks and keep going .. sorry for my poor english I'm from iraq 🖤
Happy new year to you too. Very interesting 50+ minutes. Weird fault and even weirder vibrating.
Ah the joys and stories of Apple quotes that Louis Rossmann and Paul Daniels share, as with this one. Louis has a great repair wiki nowadays. And of course, Paul's Flex Board View. There's info on Louis's repair dot wiki for this model:
Differential diagnosis for cycling SLPS2R and AWAKE voltages/signals:
• Short on any of the G3S power rails.
• Failed PMU (U7800).
• Short on PP3v_G3H.
➤Diagnostic Steps
1. Check voltage and resistance to ground on PP5v_G3S.
- The resistance to ground on PP5v_G3S should fairly high, well within the kilo-ohms. Voltage should be around 5v. Values less than 4.9v should be considered abnormal.
2. Check voltage and resistance to ground on PP3v3_G3S.
- The resistance to ground on PP3v3_G3S should fairly high, well within the kilo-ohms. Voltage should be around 3.3v. Values less than 3.215 should be considered abnormal.
3. Check voltage and resistance to ground on PP1v8_G3S.
- The resistance to ground on PP1v8_G3S should fairly high, well within the kilo-ohms. Voltage should be around 1.8v. Values less than 1.70v should be considered abnormal.
4. Check voltage and resistance to ground on PP3v_G3H.
- The resistance to ground on PP3v_G3H should fairly high, well within the kilo-ohms. Voltage should be around 3.0v. Values less than 2.915 should be considered abnormal.
➤ Repair Steps
• If no shorts were found on the listed rails above, replace U7800.
• If you found a short on the listed rails above, inject 1v into the rail and perform thermal imaging. Replace the shorted component.
@My Mate VINCE
• If no shorts were found on the listed rails above, replace U7800.
I don't care how long your videos are i thoroughly enjoy all of them
I agree with the comment that you need to be looking at the two chips that interact with the charger to lift its output to 20v. Until that is working, nothing else stands a chance. Louis seems to change those chips on USB C macbooks fairly frequently though I did see the comment about firmware corruption which I hadn't seen before and is certainly something to try first..
i don't if your video was 4hrs long i would watch it. =) your awesome vince
That'd be the mains frequency you can feel vibrating, feels a bit "magnetic" for want of a better word. I have had a few Dell laptops with metal chassis that has this effect.
Happy new year to you vince
Your videos are so good - I really enjoy them.
Happy new year vice all the best keep up the good work
I have to say that I enjoy your longer videos :) Love to watch it whilst working on other stuff myself haha
That vibration could be a voltage leak to Earth, as Paul Tasker suggested. I know the vibration you're talking about. On any metal part of the housing on my Sony TC-560 (reel-to-reel deck from ~1968) I feel that vibration, but some others don't notice it. I understand that we're talking about fifty years difference in technology, but - who knows..?
Another great video, as always.
Awesome video i love the longer videos keep up the good work.
49:07 That's the classic Macbook shock, it's not so much vibration but you're getting a slight electric shock.
Yes. Happens on my mums MacBook Pro tooo
It’s a very old and not exactly harmless phenomena. Back when I was very flush I got myself a 17 inch PowerBook G4 lovely thing for it’s time. It vibrated like this all the time but occasionally would also zap me with small uncomfortable shocks. I took it back several times to the accredited dealer. Once I got it back and the headphones and speakers blew. Eventually they fixed it after having it their repair shop for ages. They left it for me with a repair invoice which described me as an arse for wanting my very expensive laptop fixed. I later discovered they had run off with the airport card… cheeky swines.
Thank you so much for the information. Very well done for beginners.
Happy New year to you too and I like a good long video so please do keep them to about an hour ish 😉
Nice one Jinxy 👍👍👍
The long videos is why I signed up as a supporter on patron
Interesting repair. Apple does make some very interesting products in terms of how they’re put together and overall built, but as a person who’s never repaired a computer myself I wouldn’t know where to start with these kind of things. In terms of the Quartz watches, I bet that overtime people will start becoming more interested in them over the next few years!
actually their designs are known to have a lot of problems, throught macbooks of every year. Like what the hell, you pay x2 for what you would normally pay on a cheaper laptop and you get flaws like this?? Ive watched enough louis rossmann to realise how apple isnt as good as i thought🤷♀ Some examples are bad pcb design, bad cooling, non existent self-repair friendly design..
I think the vibrating is just the texture of the cover. I have the same thing with my speakers at home. Its like a micro linish and it sends a small pulse through your fingers when you touch the material.
I genuinely thought you were referring to Paul Daniels the magician. 😂
"You'll like this... not a lot, but you'll like it!" 😂
Happy New Year Vince 🎉
Great video Vince ❤️
Keep it up Vincent!! You’re going to get this one next time bud!!
The weird vibration you're feeling goes away if you disconnect the charger. It's something related to grounding. I get that sometimes when charging both on my current macbook as well as the previous one.
floating power going to case. I used to get this of chrome trim on tv and dvd/cd players. it's strange that you havent experienced it before. ;) keep up the triffic work.
I watch all your videos beginning to the end with coffee to my right.
one wire circuit? I believe the psu will not output full voltage spectrum if no power good signal back. That glass chip is fragile from memory watching Rossman I wouldn't go near it with tweezers or anything. Great vid. Happy New Year!
Why do I smirk every time Vince says "pee pee bus"? I'm so childish! 😄
"Damn you, PP BUS!".
Indeed.
That "vibration" is pretty normal... it is a slight electric current from the mains charger, my 2011 and 2012 MacBooks do the same thing.
Apple rubbish ;)
You will get it sorted Vince, have faith in you. Mick 👍🍻
My two old MacBook Pros also had that static vibration on the chassis when plugged. Some kind of voltage going on through that but they were like that from factory. Who knows, maybe the chassis is grounded and acting as a faraday cage on purpose to isolate the laptop from external EMI?
i3 in the description is a good indication it's an Intel machine :) Love your channel! (especially the B&O stuff)
you get that on most metal shelled electronics, gave someon a static shock ffrom it, my laptop also gives off that feeling
Happy new year Vince :D
Thank you Pawn, likewise to you buddy 👍👍👍👍
its not the destination that matters mate...it was the journey... keep up making those awesome video
Unlikely, but check ground connections between the USBC socket 0V pins / shield and laptop ground / 0V. I think you measured 13V at one point so something is trying to start. The tingling may point to power supply / MacBook earthing continuity issues. Apply 20V from bench power supply directly to the board (with all the usual protection in place).
The vibrating is electrical static. I get it on my working Macbook and other metal laptops.
I LOVE YOUR LONG VIDEOS!!!
I would check ground points for nice solid connections and corrosion.
You are an Excellent teacher I am retired tech you make repairs practically ease to follow If I could start over you would my person to follow Its easy with your funny explanation Nat in USA
good job mate.
That unstable DC reading could be loads of ripple (AC) on the supply always worth flicking the meter to AC....cheers.
Great job so far! I bet you can get this one working! It's going to be the charging IC probably. The fact you've narrowed down the fault to a specific power rail, just back track and rule out the few ICs before it. The other thing I noticed is that flat flex connector -whilst the pins are clean now, the connections to the PCB were grey there too - but that might not cause any problem.
Vibration caused by voltage leak to earth? Does it feel like a very slight minor shock? Common with switch mode power supplies. You can get that feel when you touch an aerial on a dab radio that is powered up or a metal phone after it’s been on charge for a short while.
It does Paul, very faint though but noticeable. I wonder if the vibration is 50 pulses per second then (50Hz) ?????
@@Mymatevince I suspect it will be 50hz given the UK mains frequency. It’s probably normal given the metal shell
Thanks. got and HP with aluminium case. when its conected i feel the slightly vibration,
@@paultasker7788 I have the same sensation on my macbook air 2013 (still going strong with original battery). But only when connected to the charger. The vibration is even there when the electricity to the charger is cut (through a smartplug between charger and the wall). I have gotten used to the feeling, its kinda soothing. Anyway, thx for an interesting video although the mystery remains unsolved.
@@erik.dahlberg There are a few causes for this.
One is, if not using the extension lead to the block, direct plug to block has bad grounding.
The other one is, the ground pin on the power supply block is dirty, or the ground on the plug itself, try giving both a clean, this always resolves mine. Plugging into a multi socket with other devices does also.
My iPhone 13 pro max had the same strange vibration when I rubbed my finger along the bottom when on charge got freaked out bought a new charger and it stopped cool video as always Vince
you should try to inject the correct voltage of the board after the second mosfet and if the laptop powers up you'll know that the problem is before the two mosfets it it didn't the problem will be after the second mosfet
You dig deep, 👍 great info bro!
Mine has always vibrated, I know exactly what you mean - it’s almost like an electrical feedback ‘buzz’. Afaik, it’s always done this and while it is second hand, it’s from someone I know and don’t think they ever had it opened up.
I had this vibration problem. I reset the SMC and it solved.
Great Vid!!!🙂
You should get a thermalcam and check it with it. Maybe you see a flashing component that gets hot
You are only youtuber that i watch till the end😁
Time to conquer these Vince ! Gutted I'm not watching the revisit! Tick Tock Tick Tock ! 🤔🤣
I have that vibrating feeling at my iPhone XR and 13 Pro, wile charging.
yup earthing issue on power supply, causes the micro buzz, its a small current of some kind filling the body as not properly earthed, Jonathan in london is right some power supplys earth back to the mains correctly, cheaper ones don't.
the vibration is known to me on from also older MacBooks. I felt it on my MacBook Pro 2012 . I thought it has to do with the brushed aluminium.
I always feel that vibration on all my macs when they are plugged in. I even played with my wife that I could tell her when it was disconnected with my eyes closed so I suppose it’s normal.
Those vibration is probably electricity running through the chassi, i had a similar thing happen to my HP.
The problem with water sensors in electronic devices is that humid environments can cause them to change color regardless of anything being spilled on them. They are fully aware of this but use it as a excuse sometimes to charge the customer more even though the device shows no actually water damage.
True, but also you can get water damage due to condensation, not just by spilling half a litre of diet coke in the thing.
It seems to my mind that any condensation damage is a design issue, not a customer issue, but the manufacturer will point you to the small print in the EULA where it states the environment you are allowed to operate the thing in.
Basically so long as you operate it in a desiccant filled space ship at a constant and unvarying 20C, away from any earthly planetary influences you will be fine and can claim under the warranty.
I wonder why he didn't show the liquid indicators, because it could just be residue from poor cleaning in manufacture, ie, he is chasing a red herring based on a report from a company that gains $s from misdiagnosing problems.
I thought maybe you could look at that bus voltage on a 'scope, preferably an old CRT one. My guess is it's switching in and out rapidly.
I wish longer videos were more popular because I love them
I've felt that vibration on laptops in Curry's that have metal bodies, and the same it stops when you unplug them, I think it's some low level voltage going through the metal, I think it's fairly common to metal laptops, not sure what the physics is behind it though
to quote @micah fuller "What you're feeling isn't an actual vibration, it's a small voltage current being created by a short to ground caused by the charger. It's the same concept as feeling it through one of those plasma globes.
Edit: It's normal for them to do that while plugged in. The Apple chargers are actually crap."
I watch Louis Rossman and boy does Apple make it difficult to fix their stuff, as if customising standard chips wasn't enough (deliberately to make them unavailable) they have started serialising parts. So that even if you use the genuine part, you still need their proprietary hardware and software to "code" the parts to talk to each other. Needless to say no Apple junk is present in my house.
Bang on. None in mine either.... never will be
None here either. I once had an iPhone 6 to see what all the fuss was about but that particular one was poorly made and I went back to android.
over engineered junk
That "vibration" is actually you touching ground while plugged in. I don't know the technical cause of it, but like every model I owned the past 10+ years had this when the charger was plugged into the Macbook AND the wall IF the socket was a grounded one. If you plugged it with the 2-prong EU thing with no ground, it didn't happen (if I recall right but I might be wrong on that detail)... weird stuff going on with grounding.
Love longer Vids. Where did you get the schematics from? @my mate vince
I think the vibration you're feeling is actually to do with the anodized finish of the metal, my MacBook Pro (2018) you can feel the same thing! Im pretty sure its just the finish of the metal though. Hope this helps :)
Great video, i think you need a thermal camera for more easy on your trying to fixed video.
I think that ‘vibrating’ is some of grounding. MacBooks will do that while they are plugged in-
The phenomenon you felt is called touch current. It is caused by leakage current trough capacitances of the AC mains power supply. The amount of allowed leakage current is defined in electrical safety standards. Relevant safety standard for laptop PSU is IEC/EN/UL/CSA 62368-1.
The vibrations is because the power supply isn’t grounded it happens a loti get it from my iPad sometimes
There is a DC side. (that plugs into your Mac with a USB-C connector). That part works fine and needs no adjustment.
There is an AC side. That part carries only TWO conductors into the power adapter. Remove the plug portion that plugs into the wall, and substitute the 2 meter AC "extension cord" which also carries Ground to the power adapter, and the entire business will quiet right down and behave itself. No more tingling.
That slight vibration is definitely caused by a "ground" problem, and have seen this many times ,and is often caused by the mains frequency
Wonder if connecting s bench power supply and disconnecting the output from the place that the power is supplied from to that rail would be a good test just to make sure everything after works.
Great video Vince! Reach out to Louis, he is the master. Cheers!
Hi Vince, I'm curious what exactly you used in your ultrasonic cleaner for cleaning PCB's. I have one that I clean carburetor parts with and carb cleaner. You mentioned de ionized water and ? I'm surprised you use water but I guess after drying completely it should be ok.