You think the Main Power Rail is shorted to GND? YOU ARE WRONG!!

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Camera Top Bench and Microscope area: Logitech BRIO 4K - amzn.to/3Sh94kl (Affiliate-Link*)
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Опубликовано:

14 окт 2024

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Комментарии : 41

@personalPickle 2 месяца назад

Well done for still uploading the video showing that not everything goes to plan and there are issues from time to time - Nice work 💜

@martin54123 22 часа назад

I have similar Asus Zenbook laptop which has no power and no lights on PC but power supply is good. It's useful to know what is the likely cause, unfortunately my electronics knowledge/ability is restricted to soldering large items not these micro components. Great shame their isn't a chap like you near me in Portugal, my local IT shop quoted me minimum €200 cost to send it off and have it assessed by a company! Very interesting video, thank you.👍👍👍

@CarlosGarcia-d3e 2 месяца назад

I don't physically know the Zenbook models. I watched a lot of videos before I started getting Asus ROG game laptops serviced (sometimes you can't refuse) OMG! With this divine expression do I avoid giving my opinion about them? Well I hope so. Another way to say it, I followed your troubleshooting and I liked what I saw. Very interesting content. I saw your note written at the end. Excellent repair Mike. A sincere congratulations. Thank you very much for your time and sharing. All the best.

@mime4331 2 месяца назад

Nice to see another video Mike! I always watch with great interest. Not a long time ago I had got that sort of problem. Main power rail was shorted with the 1.2 and 3.3 frying the fets The new fets that you have got on the board are better in terms of circuit protection and CPU/APU might survive. 33:09 hand you your heart hoping it's gonna work 😂 happened to me so many times...

@CaribbeanParadise-cn3sy 2 месяца назад

Repairing laptops can be both rewarding and challenging, your teaching techniques excellent. I understand USB-C circuit better now, thank you. Oh and congrats fixing it.lol. 👏

@fairrepair_en 2 месяца назад

@@CaribbeanParadise-cn3sy thank you! :)

@teslasapple 2 месяца назад

Yes, tested your patience but it paid off in the end. Very educational and much appreciated sharing your experience and knowledge 👍

@TenkaiSp 2 месяца назад

Teaching important lesson here. Great job 👏

@alessandrovirdis520 2 месяца назад

Very good repair and explaination, well done Mike👏🏻👏🏻💪🏻

@fairrepair_en 2 месяца назад

@@alessandrovirdis520 Thanks!

@cliffordh4595 2 месяца назад

I believe your videos are great and your an educated, very good teacher. I just don't like and refuse to stare at the top of your head every time you lean forward a little

@fairrepair_en 2 месяца назад

I'm really sorry and try to improve this behaviour... :D Thanks for your comment.

@leonardosalvatorelli899 2 месяца назад

Great job !

@linomoschin9521 2 месяца назад

bella riparazione grazie ciao

@transformateur9969 2 месяца назад

Thank you very much !!

@stevedebeukelaer1424 2 месяца назад

Nice repair Mike. But was the driver removed through customer or other repairshop. Or asus forget it to install it.

@fairrepair_en 2 месяца назад

@stevedebeukelaer1424 I have no idea, but someone ripped it definitely... :D

@majong_da 2 месяца назад

Nice explanation I'm pretty sure what Some guys on YT (like Bulgarian guy and some Brits) already fried some CPUs injecting 19v straight on b+ after input mosfets

@fairrepair_en 2 месяца назад

@@majong_da Ohhh, here I am pretty sure too... :)

@TheResoluteHawk 2 месяца назад

I had this EXACT same issue on an Asus G14 GA401QM. 7Ohms to ground and the main power rail was shorted directly to CPU VCORE. When I injected 1V at 3A, the CPU was getting warm, so I figured this board was a no fix, but then I thought maybe a CPU DRMOS was bad. The problem was that there were no heat spots on any of the DRMOSes, so I had to guess. The first DRMOS that I removed relieved the short and resistance on the main power rail into CPU VCORE shot way up in the 50K Ohm range. Once I replaced the DRMOS, the board powered on and posted. I almost called this repair a no fix before I even tried to actually figure out what was actually bad - the CPU or the DRMOS? Luckily it was the latter.

@registriert2012 2 месяца назад

great job as always 👍 the 2Q driver chip was missing from factory or was there a prior repair attempt? 🤔 gruß aus whv :)

@fairrepair_en 2 месяца назад

Good question! I have no idea, but obviously it was the origin of all issues right from the beginning so I assume I was not told the whole story of the laptop... :)

@fairrepair_en 2 месяца назад

And if the other Phases would have been configured the same, it wouldn't have took me so long to find the issue... 😂

@anzejarni 2 месяца назад

Why aren't the low voltage rails protected with a TVS diode or a similar component which would short the rail when voltage too high and so protect the GPU/CPU/APU and similar high cost complex components?

@fairrepair_en 2 месяца назад

This is a good question. It's either by purpose or for some reason can't implemented that simple. Best regards

@asv5769 2 месяца назад

Hello, not sure I understood right, at 20:10 you put new dual mosfet on the place where you removed the faulty one and then replaced two more mosfets, before finally changing this larger chip (presumably VRM controller). Why is that? Why 3 mosfets in total? Otherwise, very good video, I like it.

@fairrepair_en 2 месяца назад

I have shared a short explanation at 18:00 The failed Mosfet could have damaged the corresponding controller, which at the same time might be able to damage the other two Phases, respectively the Mosfets. If you take the risk and replace it only, it might fail again and next time it possibly kills the CPU. Just ignore the fact that the driver was missing, this is a different Story.

@asv5769 2 месяца назад

@@fairrepair_en yes, thank you, I confused this with high side mos, low side mosfet and vrm, three in total. Thanks once again.

@unintendedperson 2 месяца назад

what brand of the usb charger brand it is? when the short happened. is it original which come with the laptop from factory?

@fairrepair_en 2 месяца назад

Unfortunately i can't tell. The Customer sent the laptop without charger. And detailed history was not shared.

@unintendedperson 2 месяца назад

@@fairrepair_en how about your own charger?

@fairrepair_en 2 месяца назад

@@unintendedperson This is a OEM Apple charger 96W. And the reason why i was afraid to connect power before solving the issue... :)

@Sofian375 2 месяца назад

You can't check a dual mosfet with a multimeter?

@fairrepair_en 2 месяца назад

@Sofian375 you can, If you know the exact pinout, which differs on many different models and if you understand how High- and Low-Side are merged in this package.

@fairrepair_en 2 месяца назад

@Sofian375 In this case a measurement was not necessary anymore. The symptoms are way to clear.

@TenkaiSp 2 месяца назад

One way to check is to compare the readings between the mosfets (only those that supply the same power rail!), I usually check between drain/source and both gates The faulty one will read different values (often in ohm-range) than the others :)

@Electricworld-1 2 месяца назад

🎉

@youssefhany6555 2 месяца назад

25:40 it will not work because the controller has a firmware and needs programming ... don't replace the controller unless you know how to programm it ... just replace all the DRmos

@fairrepair_en 2 месяца назад

@youssefhany6555 You have not watched the full video. No bullsh*t on my channel please.

@TheResoluteHawk 2 месяца назад

@youssefhany6555 You're mistaking the CPU VRM controller with the Super I/O (which does need programming...unless it's a BGA). The Super I/O does not work directly with the CPU VRMs.

@unintendedperson 2 месяца назад

first