How a shorted input mosfet looks like - Dead shorted mosfet behaviour
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Thanks for all the knowledge you share in each video!
Thank you!
that's why it is always good to have some kind of hardware that shows you how many AMP or how many voltage are taken by the device it helps a lot to solve the problem
Your good. I'll watch your old videos again, just to make sure I dont forget anything.
You are greatly inspiring Sorin. Great to learn from you and your fantastic videos.
Thanks!
Thank you!
Thank you for making these videos. I am learning a lot from you. Very soon I will open my own computer repair shop. God bless you.
Great work as usual.
Many Thanks Sorin
May God Blessed you sir
Nice job, Fantastic smile
Hey Doc, this was a very interesting class. Could you tell me about this electric screwdriver you use?
I've decided that starting today that I'll keep written notes about all these tips, I'm afraid of forgetting them
interesting and informative video.
Thanks sir
with mosfets failing so often in laptop p/s, would be interesting to know typ failure mode (over temp, over current, voltage spike etc). then design steps could be taken to better protect, making laptops more reliable. again, great learning experience.
Designer know all that but in the end BoM made by someone else decide about everything and not engineers.
@@gorky_vk absolutely right.
Sorin thanks for the video, now why have you replaced the mosft not putting a proper calibrated fuse
I do not understand. Where did the current go to the battery. Through the gate?. Are we talking about the sudden current of 5 amperes or about 2 amperes
looks super easy !
Thank you nice video
Thank you....laptop quick service!
Thank you for sharing another tips sorin but i wonder what would be the resistance reading on the dc port of the laptop would it show low than go high? and i think you got yourself a set of dc jacks for testing very nice
that is good my oga
please may i know what kind of bench power supply you used idol sorin?
Sorry for my stupid question, all the msofet are the same? can i replace any mosfet with any mosfet? for example change a pc mosfet by a lapttop mosfet?
So the charging current is not controlled.
I don't understand , the laptop power on and there's video signal , so there's no need to remove that mosfet .
Thanks sorin. Why the current rise like this? more than the battery charge current.
Sorin i have a question, i wanted to post on the Forum but i didnt see where we can post. So Here is my question. 1. What is the effect of by passing a MOSFET using a jamper from the source to the drain incase the gate is not receiving Voltage or incase i don't have a replacement Mosfet. 2. I know there's an official Honnest ways of testing for a faulty MOSFET and you have taught us here on your platform many times. But I saw some test mosfets in DIODE mode. It was an N channel Mosfet and he put the Red probe on ground and Black probe on source and it was beeping and he concluded that it was a shorted MOSFET. And indeed it was shorted. So could this also be another way of testing a MOSFET?
In case of shorted mosfet where you put what probe is irrelevant, it will be (around) zero ohms in both direction. Diode mode will show diode junction in case of good mosfet in one direction (depending on mosfet type it will be one or another) but it will always be open in opposite direction.
You can bypass second mosfet in most cases with wire and just rely on protection in charger in case of short (Sorin did that multiple times, that's how he get king of dodgyness award :D) but bypassing first one can make problem with charger as you saw in this case.
@@gorky_vk Thanks alot for that information. message well absorbed.
Morning guys
.
4:12 how much air and temperature
Nice one
a customer today brought an asus x541n/na laptop no powering on but just having steady red light from the charger, ive check all the voltage and all chokes, or vrm and ldo have the corresponding voltage but the cpu is none because the power button is not working even tried to short the connector doesnt work too. and my suspect is the 2nd input mosfet is semi faulty using diode mode both drain and source have a reading on diode mode but doesnt in buzzer and when plugging the adapter the cpu heatsink warms up little? do you think guys the cpu is shorted? the cpu vrm heats up too a little like the cpu but not that much probably warm.
Hi sorin , how we can have this cable for Dc Power Supply to connect to any laptop? What is the name of this charging cable to connect to Dc Power Supply ? thnx
Awesome lesson, thank you magicman! #magicman to start a new trend:))
Had to watch Start few Times confusing Fault..Why did Fuse not Blow??
What can happen if it's a gaming laptop in this scenario, (those with very high power chargers of up-to 10A. )🧐
He Here I’m which your program an you tube My question I have laptop Sony Vaio it’s not turning. On please help me out.
abstaining easy
Bună seara tuturor ! De unde se poate cumpăra acel set de cabluri pt sursa de laborator?
www.amazon.co.uk/shop/electronicsrepairschool/list/31TR4E97KWUZF?ref_=aip_sf_list_spv_ofs_mixed_d
sorin my teacger em from kenya
cool
Hello 🤝👏👏👏👍👍👍👍👋👋👋👋👋
Sorry, it is not clear to me why when you plug the power supply the current is too high and then after few second returns at normal values, allowing to start (no the same with a charger as you explained since it shuts down instantly). Where is that high current going for few seconds? Thank you.
The battery overcurrent protection is disconecting the battery, that's why even if the laptop starts, the battery won't charge
Sorin a classic problem
Niice
Why you dont use flux to remove the mosfet is easy
When at 3:35 it looks like there is a blown capacitor on the bottom right.
Yeah I saw that too or some liquid dammage
only dust there
Hello hello
Lonovo t420 dead
first :)
Oh ya are fucken not.