3 years later and you helped me diagnose and repair a HP Dv7 I bought for almost nothing due to being "dead". Thank you so much, your videos were extremely helpful and encouraging for me. Cheers and love from Argentina
Just fixed my first motherboard, thanks to this channel. Mosfet had blown due to voltage being injected into the Ethernet port. Switched it out with one from a parts board and even though 2 of the pads were damaged it still worked when I bridged the three pins together, they were connected originally anyway, and it seems to be working now.
I'm an electrical engineer, long retired. You are the best technician I ever met. I love fixing things myself too. That's why my refrigerator is 35 years old, my electric stove 35 years old, etc. I fixed the electrical power display on my stove so many times, using two broken displays to fix one. My Porsche 944 lasted 550,000 miles. Anyway, I wish you could show a video reading the pins off a USB power connector in my Dell 9365. Good luck. I'd send you my Dell, but you're in the UK, correct?
I'm looking into repairing electronics mainly TV and laptop but anything n everything really I have bought all the tools necessary and I'm considering getting a thermal image camera as I intend too fix boards myself but I just wondered if you have any advice in general you could share if you get a moment...cheers mate 👍
I know that's a broad question 😂...but just wondered if you could maybe give me advice when I get started on things would really appreciate it if possible thanks again
Not too long ago my friend brought a Toshiba laptop to me to fix for him. He told me it has been repaired two years ago and when i took it apart i found a big piece of copper wire across one of the 19V mosfets. Turns out one of the mosfets shorted out and the previous guy who fixed the board put a wire across one of the mosfets that didn't short out so basically the protection circuit was completely omitted. All it took to fix the board was to replace the one shorted out mosfet with a working one and the laptop works fine now and for a cheap budget laptop it has a great keyboard.
Thanks for taking the time to explain the process through which faulty components are found, I find your videos very enriching. Keep up the good work, you deserve all the success that life can bring you.
Am really learning more from your videos and I love the way you diagnose board and the explanation and I am still learning more because I want to start my fixing business. Thank you so so much. Sunday from Nigeria.
a pesar de muchas criticas que tienes por esta reparacion..revivi una asus s451lb que llevaba muerta 8 meses por polaridad invertida...le hice jumper en el mosfet y revivio...carga y funciona perfectamente desde hace 4 meses..gracias maestro!
By passing the mosfet is not a safety issue? Why not track down loss of gate voltage. Enjoy watching your videos , educational and very calming to watch. Thank you
2:35 Frame I just started watching, there might be a short around the wiring in the screen panel, because when you layed it down it turned on. Your hands are around the display,and hinges. so was I right? Oh? We are not working on that one??? Ok next.
waoh, i'm so happy right now.... watching your videos is the best thing I did since last month, My laptop m6-ae151dx isn't charging any battery , found out the useless capacitor after the battery driver shorted , I knew it was the one cos it looked a bit discoloured. chipped it off with a soldering iron and , walah.....Laptop working perfectly so so happy...that's over 200 USD saved
Hi Sorin, I missed this one in Nov. A really good one for me as I just watched your motherboard videos, it's all making much more sense! One thing I am having a problem with still is the recognition of some of the other 6 or 8 legged chips as you go around finding the power supplies. What are they? (I can't be the only one surely), my excuse is I didn't start leaning this stuff until I was 74 yrs old. Since this job came in as a MB are you sure he is not one of your applying the power supply here or there students?
So how do you know what leg to jumper to. In order to pass the 19v ? I learned a few things from this video. But where I got lost was when you put the jumper and why not put a new mosfet?
the mosfet is fine,there is not input voltage to the gate from somewhere else that failed,he just bypass it,im not sure about the consequences of that move but i guess he knows his stuff
That comes from the way a MOSFET works, it is just like a water valve. The Gate controls the flow of water, on or off. If you bypass the gate (putting a jumper from input to output) you're just bypassing the gate. Also, the water in this case is a very very high current so you gotta be careful. Mosfets are essentially built, most of the time by 3 terminals.
Very interesting. So - in summary. It looks like you kept the shorting wire in place instead of the mosfet - and still don’t know why there is no voltage on the gate and/or if the MOSFET is bad - or if the circuit feeding the MOSFET gate is bad !! So if that gate feed comes from the power management chip - aren't you worried that there may be some valid reason the power management chip isn't turning on the mosfet? Is there a possibility down the line that a possible real error might cause the motherboard or CPU or something to burn up??
Those intermittent sometimes-it-works issues are painful. Occassionally they'll be from faulty discrete components, but most commonly it's going to be a simple physical layer problem--loose connection to a component or cable, cracked soldier line/soldiered pin loose in the socket, screw/frame metal shorting a circuit, slight break in an internal ribbon cable--and just by moving it, or holding it differently, flexing the frame in just the right way, you either make or break the intermittent connection.
Hello, mindblowing...but i need to know....i have the same problem. From where to where is the copper cable going? What could happen if we DEsolder the mosfet and plug de power supply?
Hi there , this tutorial video is absolutely is one of your best tutorial and is absolutely for beginners , you explained very simple and very good . please make more tutorial like this . as you can see you explain step by step . kindly make a tutorial video about how we can use power supply for diagnose short on mainboard for beginners like this video . thnx
So my understanding is that the mosfet is fine but there is no voltage on the gate because of some other faulty component? Is this correct, and if so what voltage should you expect to see on the gate in a working laptop? Also, why not trace back from the gate to try to identify the faulty component, or is it just too time consuming and it doesn't matter so much? Thanks in advance for sharing your knowledge, it is really appreciated.
Great video learn so much. Can I ask you common problem with older dell.. "battery not recognise" and it won't charge. Could you find a fix. Why do they care what battery I use.
Any suggestions when a motherboard has no power, no charge, works on battery and the 1st and 2nd mosfets have been replaced. A BQ24725 is driving the gates for approx 20ms and then turns them off. 1.3s later the gate turns on again... etc... Jumping the 1st mosfet makes the laptop work but I noticed a very heavy current draw when the battery and AC charger are plugged with the bridge in place. Checked all caps and resistors to gate, ACdetect, etc...
hello I do not understand why connecting the source to the drain of the mosfet does not put the card in safety. I have seen many times in videos that a blown mosfet becomes on and therefore the card detects it and cuts it gate signal thank you
Took some water damage from underneath (sat on a wet table). Computer boots up, but cooling fans run continuously and computer runs very slow. Hard drive removed.
I deeply appreciate your effort in making these wonderful and perfect videos. Which has helped me alot. May God almighty supply you more wisdom and strength and long life.
Ever heard of mosfets not working then working a couple times for a short period again before they die. Trying to diagnose an xbox that was not working then worked twice for about 5 mins a few months later that is now not working again haha. Board has signs of short or ground out. But seems odd that a mosfets would fail intermittently
Is it acceptable to have "a short" signal through the secondary Mosfet's beside "the coil", even when the gate is drained or grounded to close the gate? Are some Mosfet's designed to sound as a short between the two sides of a Mosfet that is not the gate?
Hello I have been having an issue with my laptop .No power,even when plugged no charging light . I take out the battery and put the charger,a high frequency constant sound comes from near the charging port. Please tell me what could be the issue
Did you get a solution for your issue? I have a similar problem in aToshiba E45w laptop. Power in is 19V as normal but no power light or even charging light, and I have tested each point but no joy. I am hoping issue is a mosfet.
Hey man, how do you know where is the path from the charging (plus pin) (or how do you know where is the path going to another chip etc..). I don't really understand your smart mind to find it. I don't know to identify from which point the path is going to the another
They are usually next to power input, you can see big trace comming from red wire right into these mosfets. I have one motherboard where they are completely blown, so it was easy to find :-D
Hi i was wondering what would be the problem.. i have a all in one computer zx6971 ... i plug in the power adapter into the computer and the light charger goes out .. i unplug the adapter unplug from the wall outlet the plug it back into wall outlet charger lights comes back .. i know there a short.. need information.. ???
I checked my HP motherboard and the path on the power rail checked out ok until the 2nd mosfet which had no output voltage. Does that mean that the startup chip doing it's job and shutting things down or perhaps the mosfet is faulty or because there is a fault downstream? if so then taking out 2nd mosfet and replacing with a wire would do no good...correct?
I know this is old, but I hope you still read questions. You have 19 volts on one side of the cap after the mosfet, what do you read on the other side of the of the cap. I have a video card where it has2 pin(3 pins but the center drain is cut off) and I get 12 volts at the drain but nothing out of the Source. There are 7 of these right together . 2 of them read 12 volts in, nothing out and nothing on the rest at all. I tried to check the caps as you did to check for short but I don't know what I should read on the second side of the cap. Should it be the same on both sides of the cap? If you find the time I hope you could tell me about the other side of the cap and or what to look for. I just purchased another of these boards so that I will have something to compare to. Thanks for your videos.
Lol that looks exactly like the hp motherboard im trying to fix. Same problem except I shorted the board by accident and it had no video at first but no gpu chip. I have been told that mosfet could be my problem. One thing I still cant understand is why I would have no video because everybody likes to point at the gpu and it becomes confusing to people who dont have a gpu. Thanks for the video, very helpful.
Nope. It's been used by the power controlling chip to measure the current that is supplied by the power supply, and limit it if necessary, or turn it off completely (e.g. when there's a short). When there's a current through this resistor, there's a voltage between its endpoints that can be measured by the power controlling chip. The more current is being drawn through the resistor, the bigger the voltage on it. So you can think of it as an ammeter ;)
I've been trying to find somewhere in Adelaide South Australia to do testing to see if this has happened to my laptop, and repair it for me. The only guy who looked at my laptop said that the reason why my laptop isn't working is probably the GPU shorting but I really feel that would be a bit strange as it stopped working when I plugged in the power adaptor. How might I locate someone like this?
Hi I have 100% same issue where I have 4 (2 and than 2- first 2 give power to second 2 but all on same gate connection) MOSFETs which are not letting the power to flow further to the board. I have shorted the MOSFETs and the board get the charging led. I am unable to find he reason why there is no power at the gate is it safe to jump the MOSFETs. Can one of the 4 MOSFETs is faulty and stopping the gate voltage or it’s just irrelevant. Also, is there a diy mosfet gate supply method which I can acquire. Any diode I can use any help is much appreciated. Thank you
hi i need a help to find out a SMD Diode (PJ0266) on powersupply area before the MOSFET and its connected reverse bias (where 19V) i couldnt find out the model number of this one i belive this diode for overvoltage protection ( may be a zener) . if you know any equivalent component please let me know
Hi, this is a little off topic, but its computer related, i have a lenovo monitor, and they are old lcds, i have maybe 10pcs having the same issue with vertical white lines they are all proportional, any idea to fix the lcd panel board? Thanks
3 years later and you helped me diagnose and repair a HP Dv7 I bought for almost nothing due to being "dead". Thank you so much, your videos were extremely helpful and encouraging for me. Cheers and love from Argentina
Just fixed my first motherboard, thanks to this channel. Mosfet had blown due to voltage being injected into the Ethernet port. Switched it out with one from a parts board and even though 2 of the pads were damaged it still worked when I bridged the three pins together, they were connected originally anyway, and it seems to be working now.
I'm an electrical engineer, long retired. You are the best technician I ever met. I love fixing things myself too. That's why my refrigerator is 35 years old, my electric stove 35 years old, etc. I fixed the electrical power display on my stove so many times, using two broken displays to fix one. My Porsche 944 lasted 550,000 miles. Anyway, I wish you could show a video reading the pins off a USB power connector in my Dell 9365. Good luck. I'd send you my Dell, but you're in the UK, correct?
I'm looking into repairing electronics mainly TV and laptop but anything n everything really I have bought all the tools necessary and I'm considering getting a thermal image camera as I intend too fix boards myself but I just wondered if you have any advice in general you could share if you get a moment...cheers mate 👍
I know that's a broad question 😂...but just wondered if you could maybe give me advice when I get started on things would really appreciate it if possible thanks again
Not too long ago my friend brought a Toshiba laptop to me to fix for him. He told me it has been repaired two years ago and when i took it apart i found a big piece of copper wire across one of the 19V mosfets. Turns out one of the mosfets shorted out and the previous guy who fixed the board put a wire across one of the mosfets that didn't short out so basically the protection circuit was completely omitted. All it took to fix the board was to replace the one shorted out mosfet with a working one and the laptop works fine now and for a cheap budget laptop it has a great keyboard.
How much $ should be charge for that job?
Thanks for taking the time to explain the process through which faulty components are found, I find your videos very enriching. Keep up the good work, you deserve all the success that life can bring you.
Am really learning more from your videos and I love the way you diagnose board and the explanation and I am still learning more because I want to start my fixing business.
Thank you so so much.
Sunday from Nigeria.
At 19:33 Is there a mosfet missing already on the left side of the board ?
a pesar de muchas criticas que tienes por esta reparacion..revivi una asus s451lb que llevaba muerta 8 meses por polaridad invertida...le hice jumper en el mosfet y revivio...carga y funciona perfectamente desde hace 4 meses..gracias maestro!
The first time, I see a guy, who is happy, when the notebook is not working ;-)
very hard to find problem on board when randomly work. must testing for days... Beter is not working at all for repairing.
You bit me to it 6 month earlier, damn you are good.
Every man who earns his living from dead laptops is happy seeing one!
He's like God, resurrecting dead laptops!
How fix hat air machine
I want to thank you for the time and knowledge you give of yourself. I learned a lot hoping to see more videos at this level.
By passing the mosfet is not a safety issue? Why not track down loss of gate voltage. Enjoy watching your videos , educational and very calming to watch. Thank you
You are good sir.i once repaired a laptop screen that was not powering backlights.you the best.thanks for your videos
UA-cam just recommended me this, and i sub... Great video and the way you explain... 👍🏻👍🏻
Interesting video
i like how u teach this.i learn by watching easier then reading.ty bro
2:35 Frame I just started watching, there might be a short around the wiring in the screen panel, because when you layed it down it turned on.
Your hands are around the display,and hinges. so was I right?
Oh? We are not working on that one??? Ok next.
Your explaining method is fantastic.
But one question is there
Sir what will happen if we dont connect new MOSFET and make just jumper directly.
waoh, i'm so happy right now.... watching your videos is the best thing I did since last month,
My laptop m6-ae151dx isn't charging any battery , found out the useless capacitor after the battery driver shorted , I knew it was the one cos it looked a bit discoloured. chipped it off with a soldering iron and , walah.....Laptop working perfectly
so so happy...that's over 200 USD saved
I like Your way, you have budget cheap tools but your knowledge is worth much much more
I love your channel...I learn a lot from your channel how to repair a PC/LAPTOP....
OK, Mr Sorin! Congratulations by your videos. From brothers tecnicians of Brazil!
I see that you put a wire over the mosfet I'm assuming to test. How do you know which pins to wire together?
Could be the mosfet gate have a short circuit, maybe testing the gate after remove the mosfet you have the voltage and can replace it for a new one.
hard to believe ,the gate is isolated from D and S
@@TheBaregel Yea but if there is issue, mosfet is broken, the gate can be shorted with S or D
Hi Sorin, I missed this one in Nov. A really good one for me as I just watched your motherboard videos, it's all making much more sense! One thing I am having a problem with still is the recognition of some of the other 6 or 8 legged chips as you go around finding the power supplies. What are they? (I can't be the only one surely), my excuse is I didn't
start leaning this stuff until I was 74 yrs old. Since this job came in as a MB are you sure he is not one of your applying
the power supply here or there students?
"Good the MOSFET is out and replace that MOSFET.. of course we replace the MOSFET.. of course.. what do you think about me?" i love this man xD
maybe you know why mosfet was not replaced?
So how do you know what leg to jumper to. In order to pass the 19v ?
I learned a few things from this video. But where I got lost was when you put the jumper and why not put a new mosfet?
the mosfet is fine,there is not input voltage to the gate from somewhere else that failed,he just bypass it,im not sure about the consequences of that move but i guess he knows his stuff
That comes from the way a MOSFET works, it is just like a water valve. The Gate controls the flow of water, on or off. If you bypass the gate (putting a jumper from input to output) you're just bypassing the gate. Also, the water in this case is a very very high current so you gotta be careful. Mosfets are essentially built, most of the time by 3 terminals.
Does the bad mosfet have to be removed? or can you bridge it in place?
Maybe an intermittent or dirty/oxidized contact on-off button for that first lab top which turned on most of the time but not others.
Very interesting. So - in summary. It looks like you kept the shorting wire in place instead of the mosfet - and still don’t know why there is no voltage on the gate and/or if the MOSFET is bad - or if the circuit feeding the MOSFET gate is bad !! So if that gate feed comes from the power management chip - aren't you worried that there may be some valid reason the power management chip isn't turning on the mosfet? Is there a possibility down the line that a possible real error might cause the motherboard or CPU or something to burn up??
Those intermittent sometimes-it-works issues are painful. Occassionally they'll be from faulty discrete components, but most commonly it's going to be a simple physical layer problem--loose connection to a component or cable, cracked soldier line/soldiered pin loose in the socket, screw/frame metal shorting a circuit, slight break in an internal ribbon cable--and just by moving it, or holding it differently, flexing the frame in just the right way, you either make or break the intermittent connection.
Hello, mindblowing...but i need to know....i have the same problem. From where to where is the copper cable going? What could happen if we DEsolder the mosfet and plug de power supply?
Thank you for your effort in sharing your experience!! I am learning a lot....
Practical education at its best. Thank you.
Hi there , this tutorial video is absolutely is one of your best tutorial and is absolutely for beginners , you explained very simple and very good . please make more tutorial like this . as you can see you explain step by step . kindly make a tutorial video about how we can use power supply for diagnose short on mainboard for beginners like this video . thnx
So my understanding is that the mosfet is fine but there is no voltage on the gate because of some other faulty component? Is this correct, and if so what voltage should you expect to see on the gate in a working laptop? Also, why not trace back from the gate to try to identify the faulty component, or is it just too time consuming and it doesn't matter so much? Thanks in advance for sharing your knowledge, it is really appreciated.
Did u got ur answe ?
Great video learn so much.
Can I ask you common problem with older dell.. "battery not recognise" and it won't charge. Could you find a fix. Why do they care what battery I use.
Great video now l know why newer mosfets come in two in one chips to stop Sorin nicking one.
Did you putted another Mosfet? Because i have one after the power supply that heated and don`t have power. Can i take it out?
You are the master of the masters. Thanks for your knowledge.
good video on how to fault to a component level. thanks
Good work sir .. thanks for share your experiences...sir iam from India I like your all videos..God bless you
" i dont care and i dont want to know " thats awsome like your repair ethics keep up with the videos!!!
Did you plug the battery in
Hi! What pad are you using here for cooling the processor?
Any suggestions when a motherboard has no power, no charge, works on battery and the 1st and 2nd mosfets have been replaced. A BQ24725 is driving the gates for approx 20ms and then turns them off. 1.3s later the gate turns on again... etc... Jumping the 1st mosfet makes the laptop work but I noticed a very heavy current draw when the battery and AC charger are plugged with the bridge in place. Checked all caps and resistors to gate, ACdetect, etc...
hello I do not understand why connecting the source to the drain of the mosfet does not put the card in safety. I have seen many times in videos that a blown mosfet becomes on and therefore the card detects it and cuts it gate signal thank you
well explian sir,i really like your explanation on repair's of laptop.
What are those cameras that you use to show some of the equipment?
Just curious, why didn't you change the mosfet instead of putting a bridge wire?
Omg this guy is so Good wish I had this knowledge.
Thanks Sir, at your beginning of your presentation, it was very funny!!, I like your work and I would like to get more idea from you.
You are the Electron Whisperer... Good show.
That laptop has a short that is only on if it is flat on the table. Check for a loose cable or dead solder joints.
Took some water damage from underneath (sat on a wet table). Computer boots up, but cooling fans run continuously and computer runs very slow. Hard drive removed.
I deeply appreciate your effort in making these wonderful and perfect videos. Which has helped me alot. May God almighty supply you more wisdom and strength and long life.
The capacitor near mosfet what value does it have, how many uf does it have?
Really nice videos, keep up the fine work, very very good
This platform is the best boss.
what does the dot stand for on the mosfet? is that where the first pin is?
A dot on an IC usually indicates Pin 1 of the device.
Thank you very much for this knowledge this is helping me as a young technician
Ever heard of mosfets not working then working a couple times for a short period again before they die. Trying to diagnose an xbox that was not working then worked twice for about 5 mins a few months later that is now not working again haha. Board has signs of short or ground out. But seems odd that a mosfets would fail intermittently
good diagnostic and fast solution to get error ,
Awesome, simple tips. Mulțumesc mult Sorin !!
I like your Working process ...keep uploading with new one ! Thanks
I enjoy your talk beside the fault detection and repair. 👌👍
Is it acceptable to have "a short" signal through the secondary Mosfet's beside "the coil", even when the gate is drained or grounded to close the gate? Are some Mosfet's designed to sound as a short between the two sides of a Mosfet that is not the gate?
Hello I have been having an issue with my laptop .No power,even when plugged no charging light . I take out the battery and put the charger,a high frequency constant sound comes from near the charging port.
Please tell me what could be the issue
Did you get a solution for your issue? I have a similar problem in aToshiba E45w laptop. Power in is 19V as normal but no power light or even charging light, and I have tested each point but no joy. I am hoping issue is a mosfet.
Hey man, how do you know where is the path from the charging (plus pin) (or how do you know where is the path going to another chip etc..). I don't really understand your smart mind to find it. I don't know to identify from which point the path is going to the another
Schematics
They are usually next to power input, you can see big trace comming from red wire right into these mosfets. I have one motherboard where they are completely blown, so it was easy to find :-D
Sir...my laptop is not turning on with adopter nor with battery...but chargi5 is ok..and fine.. charging indicator are on when charging
Nothing to say about you you are the best thank you very much
No electrostatic work mat or wrist strap?
Why you do not replace the bad MOSFET by new one at repairing ?
Could I ask if you would fix my laptop it a MSI GF75 the keyboard light come one and then switches off and nothing els come on please
Is that allowed to leave that bypass without replacing the mosfet ? : )
Sorin everyone admires your technical talent and I do too , but this time I want to say I love when you laugh :) 1:36
Hi i was wondering what would be the problem.. i have a all in one computer zx6971 ... i plug in the power adapter into the computer and the light charger goes out .. i unplug the adapter unplug from the wall outlet the plug it back into wall outlet charger lights comes back .. i know there a short.. need information.. ???
The Best Walkthrough video ever!!
I checked my HP motherboard and the path on the power rail checked out ok until the 2nd mosfet which had no output voltage. Does that mean that the startup chip doing it's job and shutting things down or perhaps the mosfet is faulty or because there is a fault downstream? if so then taking out 2nd mosfet and replacing with a wire would do no good...correct?
all of your videos was fantastic, easy to understand and follow! i like the way you teach very professional. thank you sir. Dave here. . (=
I was hoping to see what you find on that Toshiba. I have a Samsung laptop that behaves that way for several days then doesn't turn on any more
So the mosfet was good it just didn't receive the voltage on the gate to open it?
What a bypass
Thanks again
mosfet getting signal on the gate from other component , so the other component is bad if the mosfet is good in this case>>lol
I know this is old, but I hope you still read questions. You have 19 volts on one side of the cap after the mosfet, what do you read on the other side of the of the cap. I have a video card where it has2 pin(3 pins but the center drain is cut off) and I get 12 volts at the drain but nothing out of the Source. There are 7 of these right together . 2 of them read 12 volts in, nothing out and nothing on the rest at all. I tried to check the caps as you did to check for short but I don't know what I should read on the second side of the cap. Should it be the same on both sides of the cap? If you find the time I hope you could tell me about the other side of the cap and or what to look for. I just purchased another of these boards so that I will have something to compare to. Thanks for your videos.
Lol that looks exactly like the hp motherboard im trying to fix. Same problem except I shorted the board by accident and it had no video at first but no gpu chip. I have been told that mosfet could be my problem. One thing I still cant understand is why I would have no video because everybody likes to point at the gpu and it becomes confusing to people who dont have a gpu. Thanks for the video, very helpful.
but what happenes if the gate voltage on the mosfet was low due to short somewhere else in the board?
Maybe the power wire was faulty? And it starts to charge and work when the cable is at a certain angle?
Sir I have hp laptop board part no LA-C781P having one MOSFET no mdu1516 short but I am not getting in the market is any equivalent MOSFET I can use
On 15:31 That Current Resistor works with the fuse?
Nope. It's been used by the power controlling chip to measure the current that is supplied by the power supply, and limit it if necessary, or turn it off completely (e.g. when there's a short). When there's a current through this resistor, there's a voltage between its endpoints that can be measured by the power controlling chip. The more current is being drawn through the resistor, the bigger the voltage on it. So you can think of it as an ammeter ;)
Mainboard is hot when i plug the adaptor.Means is burned? Laptop not work, no leds nothing. Is hot for few seconds just in a small area, not all mb.
First time u show , as on the gate is no power so propably the mosfet is good , now we know how to continue.
can i ask what section do short in mosfet? is it the drain and source? thank u and more power
I've been trying to find somewhere in Adelaide South Australia to do testing to see if this has happened to my laptop, and repair it for me. The only guy who looked at my laptop said that the reason why my laptop isn't working is probably the GPU shorting but I really feel that would be a bit strange as it stopped working when I plugged in the power adaptor. How might I locate someone like this?
Hi I have 100% same issue where I have 4 (2 and than 2- first 2 give power to second 2 but all on same gate connection) MOSFETs which are not letting the power to flow further to the board. I have shorted the MOSFETs and the board get the charging led. I am unable to find he reason why there is no power at the gate is it safe to jump the MOSFETs. Can one of the 4 MOSFETs is faulty and stopping the gate voltage or it’s just irrelevant. Also, is there a diy mosfet gate supply method which I can acquire. Any diode I can use any help is much appreciated.
Thank you
Hey...great video...I was wondering how thin wire did you use?
BR from Slovenia
master please show us same principles of this diagnosis on the desktop motherboards , thank you!
hi i need a help to find out a SMD Diode (PJ0266) on powersupply area before the MOSFET and its connected reverse bias (where 19V) i couldnt find out the model number of this one i belive this diode for overvoltage protection ( may be a zener) . if you know any equivalent component please let me know
Hi, this is a little off topic, but its computer related, i have a lenovo monitor, and they are old lcds, i have maybe 10pcs having the same issue with vertical white lines they are all proportional, any idea to fix the lcd panel board? Thanks
good way of teaching..I like our accent also ;)
Can someone explain whats the purpose of the wire and what line it is connected?
What ever day, YOU ARE ALVAYS PERFECT DEAR SIR!!!!😅😅😅😅😅😅
I want to come over there
sir Sorin
Thank you! Master Class Technique