I love these vids. I have no expertise at all - just a user's perspective - but I appreciate Graham because has such a good ability to get things across in a totally unpatronising way and understandable way..
Man, I love your videos. Thanks for all the hard work, all the effort and all the tips and explainers all the way through. You are helping me learn diagnosis and fault finding in conjunction with my job.
Quick note: input & output on that tps62180 are right next to each other, any dust can short it. I still would replace it even if it wasn't shorted and i would underfill it
and a suggestion. avoiding hot air damage, if you don't have soldering tweezer, than you can use two solder tip in the same time, one of to the left pin of the component (like cap.) and the other one to the right pin.
Done watching, thank you very much for the informative repair video. I have learned significantly more troubleshooting & repair lessons in this tutorial video and to your other repair videos as well compared to my ENTIRE 4 YEARS OF COLLEGE due to the rotten & outdated standards of education here in the Philippines. I hope you will soon have a mini-series for Schematic & Boardview-free Voltage/Power Rail Tracing[12V/18-20V Main Voltage Rail, 5V, 3.3V, CPU/GPU Core Voltage Rail, DRAM Voltage Rail, IGPU Voltage Rail, System Agent/Northbridge Voltage Rail, PCH Voltage Rail, BIOS Voltage Rail, Battery Power Rail], Proper method of testing/checking of potentially faulty MOSFETs & ICs/Controller Chips, CPU/GPU/PCH Reballing and BIOS Bin File Editing.
Multimeters typically measure the current flow of a known voltage applied through the circuit and calculate the resistance. So with a capactor discharged, current can flow fast, indicating a low resistance. Once the capacitor charges from the supplied voltage of the multimeter, it resists the flow of DC current and measures a higher resistance, more true to the circuit in total.
True and explains the massively increased resistance on consecutive probing, but we also see at 14:14 and again at 19:45 that the reported resistance gradually *decreases* while probing. Is that due to the board cooling down?
@@steinsomers Since the capacitors are in the loop, and there are resistances as well. either ESR or cumulative through the entire circuit, the capacitors will also discharge and then allow more flow to occur. Since no system is perfect, it winds up in a constant state of flux when measuring in-circuit. The main takeaway is that you can't trust an initial reading when testing for capacitor short in circuit, and need to let them charge and retest for a "high enough" resistance to indicate the lack of a short to ground.
Multimeter is auto ranging, and different ranges have different voltage/current. On first measurement ir charges capacitors, on the second it starts from infinity with different voltage/current when capacitors are partially charged and circuit reacts different to multimeters voltage /current. That is why you will get two different measurements.
3mm in, liquid would have shorted ppbus to nand power... Maybe in the next video, you could show the audience not only that ppbus is on the last row of U9080, but that P2V5SW* is right on the row above. A bit of junk there along with some conductive liquid, and the NANDs are toast. Lucky customer, and well done video!
Getting the pads flat is very satisfying. Even better is soldering the new part the Mr. Solderfix way instead of putting a blob of solder on one pad :)
To everyone asking why Apple designs their products like this: Maybe it's not 100% intentional, but they probably are thinking about ways how the device might fail so they can sell another one as replacement. Putting critical parts at the edges of the board works quite well for that.
This is nothing compared to some of the repairs I've had to do. One customer brought in a PC with Velveeta cheese flung about in the CD ROM drive's innards. He explained that he'd told his toddler how to feed the computer CD ROMs in order to play his games. The kid figured that cheese tastes way better than the disk. Another customer brought his PC that we'd just built for him back with a "broken cup holder" and wanted it replaced back when writeable optical media was just becoming widely used in the early 90's. He'd been ejecting the tray on the CD ROM drive and using it to hold his coffee cup. Since CD burners were quite expensive back then this was something of an issue. One computer that had come in for cleaning had a dust bunny the size of a house cat had accumulated in the bottom of the case, the heatsinks were totally clogged up to the point where the fans were making marks in it, and it was having quite the hard time running as you may well imagine. I can't tell you how it had survived as long as it had. All this only barely scratches the surface of the things I've seen in my years as a technician.
Second hand m1 labtops are cheap but you should check the life left on those soldered on nans. Some may have alot of writes to them and you can't replace them because there coupled to the controller on the m1 chip
Ah yeah. Paul Daniels just did a video on this, and I remember him mentioning to replace U9080. I just got parts for the A1465 I bought with corrosion damage under the SMC. May try and tackle that tonight.
definitely give bga a try on a less critical (read: not customer) board, if you have a board warmer get it up to ~90-100c and its pretty easy to flow them on, its the reballing that's a pain in the ass imo.
I was going to buy a board warmer, then realised that I had one all along - my 3D printer bed will happily heat up to 100°C. Just a tip for anyone in a similar situation. Take the nice build plate off first.
@@georgeprout42 it'll certainly be better than no warmer! I usually get the pcb that hot which means the heater itself is hotter, about 130-140c. it also has an air gap between the board and heater, hence the huge delta. I'm sure your idea would work well enough though!
They have absolutely no intent for that. Firstly, it will affect the pricing, and secondly, they very much like to have their devices fail so that consumers buy another one.
I have some skills and I watch the videos to hone them, but a lot more so for the explanations, analysis and diagnosis. Question. Do you work under the microscope for our benefit or all the time? I imagine it could be easier to work on that size capacitor with the naked eyes ...
Thank you so much for Helping...... Can you Please Share the Link to Buy Keyboard Please.Mi Horizon 14 Doesn't power on, here's what another tech missed... #409
My dogs spilled a little water on my Asus Zephyrus M16. Luckily the only thing I lost was the ability to pair bluetooth devices. Not looking forward to replacing the capacitor that blew near the WiFi card.
@QuentinStephens , I'm on the software side, software bugs are the only bugs I want to know about, or rather real bugs trigger some unpleasant memories... So hopefully (very unlikely, I know FR) there's no excreting bugs around my PC ...
Hello. We are following with interest and would like to ask you something if you allow. If you don't mind, could you share the numbers of the Wera brand screwdrivers you use? I wish you continued success.
@@ralfmimoun2826 Anything can be conformal coated easily. Just get a spray can of the stuff and spray it on, it's basically just varnish. It will hinder repair though but can be removed with effort using paint remover. It's cheap in massive quantities in factory production. They just don't do it because they want it to fail. If a manufacturer made a product last 100 years they would not sell enough to keep going and after the first batch was sold no one would buy another. With Apple that doesn't apply as all the fanboys buy whatever Apple makes year after year even if it's hot garbage, which is 98% of what Apple produces lol.
This guy makes such enjoyable videos. Great picture, great audio, and the best waffling on YT
I love these vids. I have no expertise at all - just a user's perspective - but I appreciate Graham because has such a good ability to get things across in a totally unpatronising way and understandable way..
Man, I love your videos. Thanks for all the hard work, all the effort and all the tips and explainers all the way through. You are helping me learn diagnosis and fault finding in conjunction with my job.
Quick note: input & output on that tps62180 are right next to each other, any dust can short it. I still would replace it even if it wasn't shorted and i would underfill it
good tip 👍
and a suggestion. avoiding hot air damage, if you don't have soldering tweezer, than you can use two solder tip in the same time, one of to the left pin of the component (like cap.) and the other one to the right pin.
Done watching, thank you very much for the informative repair video. I have learned significantly more troubleshooting & repair lessons in this tutorial video and to your other repair videos as well compared to my ENTIRE 4 YEARS OF COLLEGE due to the rotten & outdated standards of education here in the Philippines. I hope you will soon have a mini-series for Schematic & Boardview-free Voltage/Power Rail Tracing[12V/18-20V Main Voltage Rail, 5V, 3.3V, CPU/GPU Core Voltage Rail, DRAM Voltage Rail, IGPU Voltage Rail, System Agent/Northbridge Voltage Rail, PCH Voltage Rail, BIOS Voltage Rail, Battery Power Rail], Proper method of testing/checking of potentially faulty MOSFETs & ICs/Controller Chips, CPU/GPU/PCH Reballing and BIOS Bin File Editing.
Multimeters typically measure the current flow of a known voltage applied through the circuit and calculate the resistance. So with a capactor discharged, current can flow fast, indicating a low resistance. Once the capacitor charges from the supplied voltage of the multimeter, it resists the flow of DC current and measures a higher resistance, more true to the circuit in total.
True and explains the massively increased resistance on consecutive probing, but we also see at 14:14 and again at 19:45 that the reported resistance gradually *decreases* while probing. Is that due to the board cooling down?
@@steinsomers Since the capacitors are in the loop, and there are resistances as well. either ESR or cumulative through the entire circuit, the capacitors will also discharge and then allow more flow to occur. Since no system is perfect, it winds up in a constant state of flux when measuring in-circuit. The main takeaway is that you can't trust an initial reading when testing for capacitor short in circuit, and need to let them charge and retest for a "high enough" resistance to indicate the lack of a short to ground.
Multimeter is auto ranging, and different ranges have different voltage/current. On first measurement ir charges capacitors, on the second it starts from infinity with different voltage/current when capacitors are partially charged and circuit reacts different to multimeters voltage /current. That is why you will get two different measurements.
3mm in, liquid would have shorted ppbus to nand power... Maybe in the next video, you could show the audience not only that ppbus is on the last row of U9080, but that P2V5SW* is right on the row above. A bit of junk there along with some conductive liquid, and the NANDs are toast.
Lucky customer, and well done video!
Getting the pads flat is very satisfying. Even better is soldering the new part the Mr. Solderfix way instead of putting a blob of solder on one pad :)
Always happy to see a new video while a munch on breakfast. Awesome work!
again, another great video. Good explanation of what to look for. Thanks for sharing
Conformal coating is used to give quadcopter mainboards some rain resistance.
To everyone asking why Apple designs their products like this: Maybe it's not 100% intentional, but they probably are thinking about ways how the device might fail so they can sell another one as replacement. Putting critical parts at the edges of the board works quite well for that.
This is nothing compared to some of the repairs I've had to do. One customer brought in a PC with Velveeta cheese flung about in the CD ROM drive's innards. He explained that he'd told his toddler how to feed the computer CD ROMs in order to play his games. The kid figured that cheese tastes way better than the disk. Another customer brought his PC that we'd just built for him back with a "broken cup holder" and wanted it replaced back when writeable optical media was just becoming widely used in the early 90's. He'd been ejecting the tray on the CD ROM drive and using it to hold his coffee cup. Since CD burners were quite expensive back then this was something of an issue. One computer that had come in for cleaning had a dust bunny the size of a house cat had accumulated in the bottom of the case, the heatsinks were totally clogged up to the point where the fans were making marks in it, and it was having quite the hard time running as you may well imagine. I can't tell you how it had survived as long as it had. All this only barely scratches the surface of the things I've seen in my years as a technician.
Second hand m1 labtops are cheap but you should check the life left on those soldered on nans. Some may have alot of writes to them and you can't replace them because there coupled to the controller on the m1 chip
Ah yeah. Paul Daniels just did a video on this, and I remember him mentioning to replace U9080. I just got parts for the A1465 I bought with corrosion damage under the SMC. May try and tackle that tonight.
Good luck, let us know how it went :)
dont be scare of that bga ic, they are really simple to do it but you need a good set of stencils and a good soldering paste
Love your videos!🤩. You have new subscriber.
Thanks for the video!
Just ordered my first soldering equipment. Let’s see whether I can solder 😂
"a drop of water can kill " - That is why I drink whiskey.
Ahhh the age of sailing, cruising the waves towards the unknown... Wait are we pirates or poets? We definitely are drunkards
Why are they not putting a fuse in series and a zener in parallel at the output of that power supply to save the nand chips?
Leoniv: hold my coffee spill holes...
Why the boards are not protected by some kind of waterproof covers in modern day notebook?
definitely give bga a try on a less critical (read: not customer) board, if you have a board warmer get it up to ~90-100c and its pretty easy to flow them on, its the reballing that's a pain in the ass imo.
I was going to buy a board warmer, then realised that I had one all along - my 3D printer bed will happily heat up to 100°C. Just a tip for anyone in a similar situation. Take the nice build plate off first.
@@georgeprout42 it'll certainly be better than no warmer! I usually get the pcb that hot which means the heater itself is hotter, about 130-140c. it also has an air gap between the board and heater, hence the huge delta. I'm sure your idea would work well enough though!
Manufacturers Should Put a Anti_Water Coating on The Whole Board...Like Marine Devices Do..
They have absolutely no intent for that. Firstly, it will affect the pricing, and secondly, they very much like to have their devices fail so that consumers buy another one.
what is it about caps? can they not be made more robust? i know this was water, but so many times it's a matter of a cap just "giving up the ghost".
I have some skills and I watch the videos to hone them, but a lot more so for the explanations, analysis and diagnosis. Question. Do you work under the microscope for our benefit or all the time? I imagine it could be easier to work on that size capacitor with the naked eyes ...
Thank you so much for Helping...... Can you Please Share the Link to Buy Keyboard Please.Mi Horizon 14 Doesn't power on, here's what another tech missed... #409
My dogs spilled a little water on my Asus Zephyrus M16. Luckily the only thing I lost was the ability to pair bluetooth devices. Not looking forward to replacing the capacitor that blew near the WiFi card.
No cap = no short
Very nice video!
Great video as usual.
I'll hazard a guess that the cause was not actually liquid ingress but liquid expressed by a tiny insect that got inside.
It is really close to one of the intake vents, so it could easily have been a droplet of liquid that came through there.
It's not unlikely but the MB is too clean for some bug infestation
@@evionlast I take it you haven't seen the Paul Daniels video which shows a bug excreting on a clean board?
@QuentinStephens , I'm on the software side, software bugs are the only bugs I want to know about, or rather real bugs trigger some unpleasant memories... So hopefully (very unlikely, I know FR) there's no excreting bugs around my PC ...
Hello. We are following with interest and would like to ask you something if you allow. If you don't mind, could you share the numbers of the Wera brand screwdrivers you use? I wish you continued success.
I miss the Vici.
Do you have msi b450 gaming plus max brodeview?
A drop of water seems to be better than a drop of screw. :)
Awesome video thanks
Anyone know what Amp/Volt meter he's using with the PC output/Display?
PLD-USBCM63, pldaniels.com/shop/
Paul Daniels meter
How a dropped screw can kill a motherboard 😆
It can shorten the mobo if the battery is unplugged
I would buy a mac if the ssd is removable!
What's a yolo?
You Only Live Once - generally means "ignore all warnings and just go for it"
@@Adamant_IT Damn i feel so old now :/ people don't know what yolo means
@@firzen0000 I'm in my 50s. That's my excuse 🙂
Conformal coating would keep these from the landfill. How hard would it be to make it a mandatory step in assembly?
Not hard at all, kinda like they don't want to do it for some reasons
Right, but it hinders heat dissipation and repair. And it's not cheap.
@@ralfmimoun2826 Anything can be conformal coated easily. Just get a spray can of the stuff and spray it on, it's basically just varnish. It will hinder repair though but can be removed with effort using paint remover. It's cheap in massive quantities in factory production. They just don't do it because they want it to fail. If a manufacturer made a product last 100 years they would not sell enough to keep going and after the first batch was sold no one would buy another. With Apple that doesn't apply as all the fanboys buy whatever Apple makes year after year even if it's hot garbage, which is 98% of what Apple produces lol.
A sensitive lappy eh.
👍👍😎✌️🤟
👍
Comment for the algorithm.
Strikes me fumy you should say "Normal people would use solder iron" Normal people do not fix laptops LOL Just us crazy techs.
Great info thanks.
Do you have Telegram or WhatsApp? How can you be contacted?
One reason why I don't own any Apple stuff!
Windows notebooks are not much different
Dude, you are a great teacher, but your soldering skills suck :)