How to repair Laptops using Schematics, HP 4540s no power repair
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- เผยแพร่เมื่อ 1 ก.พ. 2025
- In this video, I show you how to fix a dead HP Probook 4540s motherboard using schematics diagrams, We trace onboard IC from the schematics measuring with a digital multimeter to find out the root cause.
This motherboard couldn't allow 19V to go through the first MOSFET because of a missing ADP_EN (Adapter enable) signal, we traced back and discovered a burnt diode that disconnected power from the standby chip which creates power for EC to release adapter enable signal.
Check out my first videos about laptop schematics repair to easily understand this video.
Download a pdf document that explains the meaning of different Schematics codes and abbreviations from the link below. drive.google.c...
Download a pdf document that explains the meaning of different Schematics codes and abbreviations from the link below. drive.google.com/file/d/1bc6qSA2Sqj6D810JTnDe0Nxe0URtygdu/view?usp=sharing
This guy is good. I don’t get tired watching his video. He really know what he is doing. Keep it up Sir Chaz
I was like, this video is so boring, but I just had to watch it till the end and well, it got quite impressive and and informative. Nice detailed video bro. Keep up the good works.
Haha thank you
Make more videos like that one.
One of the best repair videos I've seen lately. Well done man. 👍
Thanks you for appreciating🤗!
This is one of the best laptop repair videos out here on TH-cam
Subbed to your channel
Thank you buddy
This is by far the best laptop repair video I have ever seen and believe me when I say I've seen a lot!! Thank you very much for this, God bless...
Wow, thanks!
Amazing. Just amazing. I swear I'm wowed I won't have ever thought of using this method of repair. I'm glad I learnt something new today. Pls be consistent in your upload. We still have a lot to learn from you.
Thank you, I will try my best
Thank you for this video sir, at first I struggling on how to use the schematics but with this you make it easy to understand
You are welcome
This is one of the best laptop repair video! Great explanation thank
You're welcome!
thanks man u encourage me to learn how to read schematics
Really good video!!
I would love to see another video where you go a little bit more into how to figure out where lines are coming from. Basically what you did now with the tracing the power path, but maybe with a bit more explaination. I am often confused on where a line is coming from or where its going, especially when looking at apple schematics.
Oh I get what you are saying, actually a simple way to know the direction of power flow in schematics is from left to right, on top of that you can also the arrows at the end on the line, plus trace for words like "in" and "out"
This is just the video I have always wanted thank you sir for your knowledge. I am 100% confident to work on my laptop now even though I dont have hot air station😂😂😂. All in all I am thankful
Great job, continue working with schematic diagram. We will make our laptop soon or later.
Exactly, that's the mission
Doing a great job man, well done 👍👍
Thanks 👍
Hi there, please upload more videos like this. it was awesome and easy to understand. keep it up. thnx
You are good teacher, God bless you.
OOOh my brother you're the best i've subscribed to your channel keep it up may god bless you
Thanks brother and welcome
Hi there , your explanation is very good ,please make a tutorial video about how we can read Schematics for beginners . thnx
I created them, check them out here.
th-cam.com/video/HtbCBlMkI90/w-d-xo.html
@@platinumphonesandcomputers yes i saw them and it was perfect but im waiting for part 4, you didn't make it yet. Please make it as soon as possible. As i said you're explination is very good especially for beginners. Please make tutorial video part 4 for us. Thnx
You are the best buddy, keep it up
Your work is perfect, can you do a video of hp 8440 that lights then go off immediately. Kindly
your a genius good work mr
Thank you
Thanks bro, the best explained video.
You're welcome
Great work bro❤❤❤❤❤
I subscribed to you my friend because your trou leshootin is logical
I appreciate
Very nice job done thanks and keep it up
this guy is a genius 👌
Thank you
That was brilliant, well done.
Thank you
wow, that was a good one. thanks for sharing brother.
Wonderful, really enjoy thumps up Boss
Thank you
Very excellent explanation... I have a question. I have the same laptop. One of the sot23 parts was damaged in it... and I do not know its value or number. Can you help me... I want to send you a picture of the damaged part. Do you have a way to contact you, my brother?
Do you have its schematics, you can get the chip number from the schematics.
@@platinumphonesandcomputers Thank you for your response... Unfortunately, I do not know how to read the chart... Thank you again for your response and I wish you success.
Thank you for this vidéo it will be really helpfull
You are welcome
Am watching your videos it's really amazing but i when i read schmatics diagrams i am fighting with symbols and abbreviations can you help me with that?
Thanks for your time
Actually I have a video about schematic signs and abbreviations on this channel
thanks sir you are the best
i really need your whatsapp contact sir
Most welcome
check my website
I like the way you teach you make things clear to understand thank you more videos. Do you have telegraph where i can down some of your schematic
Thank you, Telegram not yet
from your voice, i assume you are also on Udemy. I have done that course. thank you and keep it going
Yes its me Thank you so much. How was the course
@@platinumphonesandcomputers Course was good bro. Keep it up
Sir please is the gate voltage always half the main voltage or it is been determined by what it’s schematics say. Thanks
No, in laptop motherboards its usually between 3.3 to 6 volts
@@platinumphonesandcomputers thanks
So in my case, on that mosfet, from ground to drain i have close to zero volts and between gate and drain or gate and ground i have just 0.6V
But i have no schematics and obviously not enough knowledge. Is it possible to be just the mosfet? I know, they don't usually die alone, but it would be a personal achievement to repair this laptop, if you could give me a hint
simply amazing video and amazing repair
Thank you! Cheers!
Thanks bro, amazing video ..
My pleasure
Great explanation thankx man
Your welcome
Thanks for watching
You are very good. Thank you!
You are welcome
i need help I have a problem with a motherboard I bring the voltage back but all of the ic does not work volt 0 I thought the problem with ic but the problem with the cirucut it self got another working one the same result no voltage all of them there is vin no vout
Its really hard to help you without more context
@@platinumphonesandcomputers it worked i had to chosse either to fix short cirucut or to fix fix it with ohms this short cirucut is hard to find i had to take a look at the schematics you have to fix short near cpu first
Very good video man
Thanks man
Thank you very much
You are welcome
Bro I have 3 laptops same series with the same problem of no power starting the laptop. I think this is good.
Sure I think if you follow you can successfully fix them
Hello sir I have a problem which is when I charge my laptop there is no light and no power can you tell me please
Old type of Mosfet for older laptop type 🤔, please when you open schematic zoom so I can clear see from my Android phone 👍🏻
Great work bruh
Thanks 🔥
what I did I changed the dual channel mosfets I did not find any in the store what I did I took alook at the data sheet I soldered two normal mosfets gate on the gate from the data sheet and the drain on the drain from the data sheet I got back the 5 mtsc
Did the motherboard work well after?
What is the program to show the schematic you used?
Its Sumatra pdf reader
@@platinumphonesandcomputers thank you, but can you share this schematic. I cant search on the internet
Your what's up no don't seem to work,is it still valid?
Yes it's valid, put my country code +256 and I will be able to receive your message
How u got the schmatics?
th-cam.com/video/_59pwWMxQyA/w-d-xo.html
Perfect !
Possible download link
do you have board view file
No I don't have it, but you can trace the components using their labels
Hello sir do you have Schematics diagram for HP 242 G2 motherboard code: 0605A2593401-mb-A02 please help because the mosfet transistor can find the marking code.because the component is bloated.thank you
check for its board number on google
Pardon aide moi pour ça aussi looo merci pour la traduction de l'autre vidéo que le créateur vous bénisse
Merci beaucoup
Need your number boss
hello, plz I don't know if it will be possible for me to get ur number, for us to discuss
Its possible send me an email, its on my about page