Brilliant video! I was successful on my first ever try at attempting something like this. Thanks so much, my granddaughter is happy to have her laptop back in working order!
Merci de partager votre expérience! Même si je ne comprend pas trop l’anglais c’est un plaisirs de regarder. Comme vous aussi j’ai beaucoup d’échec a mon actif mais je ne désespère pas de m’amélioré. Je vous souhaite plein de réussite pour la suite!
Congrats on another successful repair. I always enjoy watching your videos. I repair radios, and always enjoy a change of pace. You may want to reconsider your philosophy on not replacing bypass capacitors (especially very close to MOSFETS used in switching voltage converters). These circuits create a HUGE amount of high frequency switching noise that is very rich in harmonic content. Although you are fixing the primary problem of the computer not powering, you may very well be creating more obscure issues with freezes, reboots, memory errors, etc. by allowing the very dirty power to continue on the trace to the next circuit. Forget interference with external devices...you should be concerned about interference with the device you have repaired. Since these tiny SMD capacitors are only pennies each, I would suggest having them in stock and replacing them when they fail. Would suck to have your customers saying...."that guy did a great job repairing my computer, but the computer hasn't seemed quite right since he worked on it". If you find time, you may want to watch this video: czcams.com/video/9EaTdc2mr34/video.html Good Job!
I repair logic boards as well, and whenever a donor board is available, I do happily replace every little thing. But many times, you won’t have it available.
Brilliant video! I'm still miles away from attempting this myself, but each time I watch you work, I pick up one or two little things. I suppose it's simply a culmination of knowledge. I still think you could've been a dentist lol. Thanks for uploading.
remember you should employ current injection ... or supply with an external power supply only if there "is" a short ... and supply voltage should be what the portion of the circuit being tested normally is designed for ... do not supply 19 v to the section designed for 3.3v or 1v etc . if unsure .. choose the lower voltage
Extremely helpful video. Thank you. My thinkpad died no power light no charging. Using your video as guide, I was able to solve the issue. Basically 19 volt power rail was shorted and mosfet near power jack was overheating. But the actual culprit was a shorted cap far away from the power jack which was detected by checking for overheating. Diagnosis wasn't too bad, the most frustrating part for amateur like me was microscopic cap flicking away from tweezer and lost never to be seen again.
About injecting power for diag purpose. Ive watched almost all of Sorin's videos at "Electronic Repair School" channel. He goes to "injecting power" as a default method of finding short circuits. That being said, he has received a lot of complaints through his channel of people not being experienced enough using the same method and frying their motherboards. He's talked about this subject many times. It would be nice if someone would do a vid or series of vids on how to power inject without damage. I watch your videos now because it got very distracting with Sorin who get distracted a lot and doesnt edit his videos. He leaves you hanging while he talks on the phone or with co-workers. Great channel, btw.
Great video Good footage quality, great knowledge, limited filler (good use of fast forwards) This will give me some new methods to test out some HP's Thank you
Thank you sir ❤️ huge love and respect from India. I also work on the same field. Your videos are full of courage, knowledge and motivation. Keep up your hard work ❤️. Greetings 🙏
Omg this video gave me new ideas for trying to fix my laptop, I already solved one dead short but I think I'm having another one like the one on this video, keep up the great work!!!
you have a very good and sincere manner of explaining ... i ve been following your channel for quite some time now .. thank you just a side note though ... you mention "voltage injection" as the method you employ to find the short .. by heating of the component thats shorting ... however ... should it not be "current injection" actually ... the voltage is irrelevant ... as it will fall depending on the powersupply and the current drawn by the short ... however it is the current that is being injected ... to find the component that gets warm/hot actually it doesnt matter what we call it 😊 only that every time i hear it i correct it in my mind
I like this method, going to give it a shot. I'm not reading much of a short from the charge port, but definitely a lot of smd caps straight to ground on both sides in the same area. Just having a hard time finding correct pads to inject from!
Hi there , just i wanted to say thankyou for your tutorial video , your explanation was very easy and understanding , please upload more like this video . it absolutely for beginners . your explanation was amazing . keep it up . thnx
This is sooo awesome! First video I watch of yours, I don't know how many you've got, but I'm going to watch them all this weekend 😎. (Can't right now, got to go tell my friend the bad news about her HP Envy 13... 😕)
Sounds like you could really use a thermal imaging camera to find any faults on a board like this. Inject power, point the camera at it and you can find the faulty component straight away.
If you have a dead short on a mobo, The quickest way to find it is let it have as many amps as it wants, Then put some lighter fuel on any Suspect areas. The excess heat from the hot shorted area will quickly evaporate on any hot suspect components.
Unlimited amps isn't a great idea - excess heat may damage the board. If the shorted component goe sinto melt down, it may weld itself to the board, which then increases the chances of damage when removing it, and so on. I generally expect to find a fault at around 3-4 amps these days, but going higher than that is potentially asking for trouble.
Hp boards have little balls of solder that work as power supply separators so u just get them off the board and all zones of the board get isolated, the finding the shorted zone is way more easy
Basic question: as the short was on a secondary rail and all the mosfets were good, I wonder why you can still see lower resistance on the DC jack input. I would have thought that the mosfets would have prevented the short from travelling back ( even though with a weaker short reading than on the fully blown rail).
Yes i still get confused when he goes on different bits of the board, i mean i think i got from this video is supposedly one of the elements was collecting the heat or elc and not moving it on to the next bit. Then he fixed a element then the moving of heat or elc became the correct circuit again so the battery and charger worked again.
Great video. My HP Envy 17-ae101 laptop has just died on me and I think it's a short circuit on the motherboard, and it looks like it will have to be replaced. It's a £1500 machine and I've had trouble with it from day one. One thing is certain though - I'll definitely never buy anything from HP again!
Hi bro I have issue with my hp pro book 6550 b laptop The charging LED was blinking 8 time When I press power button Mother board is not turn on Hp probook 6550b laptop I did RAM cleaning Additionally components disconnection Charger was good And mother board voltage is 19.45v Help me
It's easier to remove small smd capacitors like this with soldering iron with a blob of solder on the tip . Just hold 2 seconds and it will come of . :)
Great job 👍 And thank you for sharing the info.. How many degrees in Celsius you did set up the heat blower? I think hear 120.. but that is a bit low I think.. Once mate bring some Zen book that went in total "zen" mode. And when try to get some capacitors and mosfets out I have to put almost to 400° my heat gun to get result.. All that new tech have lead free solder so it is pain in the a$$. And I guess because is hard it also crack the ball solder points under the CPU and board end up dead... Now at my desk is one HP envy that look way different that that, but has power, charge.. just when you push start.. board start but no picture at all.. I presume the CPU have crack solder or it is already in "zen" mode...😂 By the way you can buy not bad thermal IR camera for about 180-200£ that will help you detecting of heat emitter on the board.
So a good way to start finding faults is to check the resistance on the power jack and if its less than 40 kΩ then there's something wrong in the board?
I can understand dual phase voltage supply on AC, but how does it work in DC? 5v is 5v is 5v. I don't see how a steady, smooth DC would benefit from layering another steady smooth DC over the top of it.
that is checking resistance thru your body not the laptop. you can not be touching both test leads, or the wires youre testing or you get a false reading
other technicians used Schematic to locate the problem. AdamantIT: uses Adam HeatHandFinder technique. hahaha! nice job sir, this gonna be the best bypass giving you no headaches.!
Thanks for this. its really good. I have a Sony vgn-aw11m that's heats a lot near the Hard DISK. On the other side of the board there is an intel chip. Wondering the Problem and a Sony vgn-aw11z that powers on with no display. Diagnose for me please. Thanx for you work
God damn, why not make a patreon account and get the people buy some tools for you. I really disturb when you go to solder something. And please make some fume extractor for your safety. 👍
At the 5:50 you are checking the ground. I have an ultrasound device and it's not detecting the probe. When I check the ground it's not connected. Is it SC in somewhere or what? Any idea?
I found an hp pavilion x360 with 180 ohms on the input jack and it cuts out the charger, could it be the CPU? I measured 4 coils near the cpu, 2 of which had 0.6 ohms and one has 4 ohms and one has 10
Hi, we have an old HPEnvy x360 13 ay000na. It won't turn on and no charge light. Considering copying your methods as the computer hasn't been used for a few years, so feel we have nothing to lose but not your its for amateurs like us. Any opinions please.
HD1 flex cable connector burnt, please please need the 12 pin pinout, I have identified on the board from left to right [1234567sata,{8?,9?},10,11,12 5v]. Pins 8,9 unknown? Please help thank you
Man you always get the lucky one's LOL every single short i got is a dead cpu drives me nutz (or im nutz but i inject and the cpu gets warm nothing else) Do you get many of those on HP? i got a rework BGA station i remove CPU and short gone lol damn cpus cost more than a used board so stupid for me!!! I try to buy some of the AS IS boards but some them dead cpus to LOL
Nice video. I have similar problem HP Envy, no power & no charge light. But when I measure resistance at the charger its open. I have checked the dc jack to see the voltage is coming to the motherboard. Appreciate any troubleshooting tips.
I assume there was voltage going into the mobo? At 7:20 you can see me checking for short circuits at the 5 and 3.3v regulators, simply by checking nearby capacitors. Start by finding those regs on your board, and checking (powered off) if there are any caps nearby that measure ground on both sides. If there's no short, plug the board in and see if you get charger voltage around those caps. This establishes if the main power rail in the laptop is actually online, or if it's shorted.
I think my envy 360 is having the same issue as thing. It gets no power no charging nothing at all. How much dose this repair cost?. I live in Portland Oregon area.
i really wish i had you laptop problems, i have 3 boards all high end, Alienware 17 r4 it did have a short to ground fixed that but it cooked a IC which im waiting for and also a fet, then i have 2 g751jy no short to ground and one i really believe is just a gonner, and the other boots up then turns right off after 2 mins either its a corrupt bios or the batt because if i try to attempt a flash in bios it says the batt isnt connected and its connected anyways good stuff learning so much really wish my boards were a short to round though i got the never can be fixed problems
I know the feel... I wade through a lot of fails between the wins. I want to share fail videos as well, but often there's nothing to learn from an hour of head scratching followed by "I have no idea what is wrong with this."
@@Adamant_IT omg good news though i did fix 1 of my asus boards last night after 10 HOURS!!! spi eeprom programmer exp2019+ c=kept corrupting the bios flash then i flashed with 25q64FW instead of 25Q64 the laptop is now working thank you so much for all ur lessons i fixed this board because of you and what i learned thank you !!! ps the other asus board i have pin 8 on the bios is shorted to ground and can you take a wild guess as to what is grounding it lol leads right to the chipset is a gonner as i figured it was
For $0.003 why not replace the chip capacitor and return the device to factory specifications? Radiating RF is annoying and costs energy, but spikes can get picked up by signal traces and cause intermittent errors as well.
And what value do you guess for said component? If you don't have a schematic or spare donor board you've no way to actually know, it's not like you can measure the value of the shorted one. Even when you have a pair side by side, the fact they're the same package/appearance, doesn't mean they're the same value.
Graham, what is the reason you did not inject at the power supply using your salvaged power cord? As the power supply sees the short, it would be a lot faster than soldering in wiring at a specific point.
You have to bypass the inrush limiter (pair of mosfets in series with the DC jack) because the laptop's power management chip will detect the short and cut the power. If you inject behind the inrush limiter, it can't block you.
Can you remember whether there looked to be room for another 2.5" drive in there? When I bought mine they all came with an SSD for the OS but there was an option for an additional 1TB 2.5" HDD which I didn't bother with at the time. I've got a spare one now and was thinking about opening mine up to see what I might need to add it in, but from your video I can't see where HP would have put it in!?
Depends, you'd need to check inside the laptop anyway. I've seen lots of laptops that have room for a 2.5" drive, but no connector for one (spot where connector should be is unpopulated).
1. On the board you were working on how much would a replacement board cost if available? I just wondered if it would be cheaper than the time to repair the defective board. I worked for a non PC company and most boards we would toss rather than fix them as the time to fix it was too near the cost of the board and we would warranty the new board but not the board we fixed. 2. On your other videos it appeared that on a laptop you were not changing the thermal paste on the processor while you had the laptop apart. So I was just wondering if you do and don't show that as most people who could get the laptop apart without breaking something would know how to do it anyway.
1. Depends... usually refurbished mobos are available between £100-200, which is usually cost-effective, but more expensive that repair. The main thing is that the profit margin on my personal time is higher than spare parts. So even if spare parts are the same cost as repair, I'll make more money repairing it. If you're paying someone else, it might be a lot simpler to replace. 2. I tended to be a bit lazy in older videos and either not bother, or not have paste on-hand. Generally it doesn't make a massive difference, the important part is that there _is_ thermal paste. These days I just replace as standard, and I've got myself a better supply of replacement paste.
When you measure the resistance en the cord which values correspond to each failure? You say 100kohm would be normal. And 40 is a short but not on the main rail. So a short in the main rail how much would it be?
Main rail should be high-resistance, anything less than kilo-ohms is a fault, a proper short is 1ohm or less. This is very generalised though, the CPU and GPU will both read as very low resistance (0.5 - 3ohms) so if one of the power mosfets has failed short, you'll see the low resistance of the CPU/GPU on the main rail, and that skews all your readings. LFC#284 is an example of this, although it wasn't a super low resistance.
Brilliant video! I was successful on my first ever try at attempting something like this. Thanks so much, my granddaughter is happy to have her laptop back in working order!
Your procedure,the way you explain some of your professional approach in addition to the knowledge you gave us My appreciation
Learning a lot from your channel, you're the man my friend ! bravo from France...
Merci de partager votre expérience! Même si je ne comprend pas trop l’anglais c’est un plaisirs de regarder. Comme vous aussi j’ai beaucoup d’échec a mon actif mais je ne désespère pas de m’amélioré. Je vous souhaite plein de réussite pour la suite!
Congrats on another successful repair. I always enjoy watching your videos. I repair radios, and always enjoy a change of pace.
You may want to reconsider your philosophy on not replacing bypass capacitors (especially very close to MOSFETS used in switching voltage converters). These circuits create a HUGE amount of high frequency switching noise that is very rich in harmonic content. Although you are fixing the primary problem of the computer not powering, you may very well be creating more obscure issues with freezes, reboots, memory errors, etc. by allowing the very dirty power to continue on the trace to the next circuit. Forget interference with external devices...you should be concerned about interference with the device you have repaired. Since these tiny SMD capacitors are only pennies each, I would suggest having them in stock and replacing them when they fail. Would suck to have your customers saying...."that guy did a great job repairing my computer, but the computer hasn't seemed quite right since he worked on it".
If you find time, you may want to watch this video: czcams.com/video/9EaTdc2mr34/video.html Good Job!
I guess the main problem with that is not having schematics or reference on what spec of capacitor to put back in place.
I repair logic boards as well, and whenever a donor board is available, I do happily replace every little thing. But many times, you won’t have it available.
Greetings. Great advice. Thanks for sharing.
Brilliant video!
I'm still miles away from attempting this myself, but each time I watch you work, I pick up one or two little things. I suppose it's simply a culmination of knowledge.
I still think you could've been a dentist lol.
Thanks for uploading.
remember you should employ current injection ... or supply with an external power supply only if there "is" a short ... and supply voltage should be what the portion of the circuit being tested normally is designed for ...
do not supply 19 v to the section designed for 3.3v or 1v etc . if unsure .. choose the lower voltage
Extremely helpful video. Thank you. My thinkpad died no power light no charging. Using your video as guide, I was able to solve the issue. Basically 19 volt power rail was shorted and mosfet near power jack was overheating. But the actual culprit was a shorted cap far away from the power jack which was detected by checking for overheating. Diagnosis wasn't too bad, the most frustrating part for amateur like me was microscopic cap flicking away from tweezer and lost never to be seen again.
About injecting power for diag purpose. Ive watched almost all of Sorin's videos at "Electronic Repair School" channel. He goes to "injecting power" as a default method of finding short circuits. That being said, he has received a lot of complaints through his channel of people not being experienced enough using the same method and frying their motherboards. He's talked about this subject many times. It would be nice if someone would do a vid or series of vids on how to power inject without damage. I watch your videos now because it got very distracting with Sorin who get distracted a lot and doesnt edit his videos. He leaves you hanging while he talks on the phone or with co-workers. Great channel, btw.
Another great video! I learned a bunch from this and now have more techniques to try!
Great video
Good footage quality, great knowledge, limited filler (good use of fast forwards)
This will give me some new methods to test out some HP's
Thank you
Great videos. I'm taking so many notes while watching these. Thank you!!
Loved this video and your channel. Learning so much. My power supply is arriving next Thursday
Thank you sir ❤️ huge love and respect from India. I also work on the same field. Your videos are full of courage, knowledge and motivation. Keep up your hard work ❤️. Greetings 🙏
Oh DEFINITELY show more failed repair vids - it encourages people to actually do board repairs since it shows what can go wrong :D
Wrong! It shows you what not to do! :)
next time i am flying over the UK, I will ask the pilot to avoid going over your workshop, just in case there is this teeny-weeny interference :D
Omg this video gave me new ideas for trying to fix my laptop, I already solved one dead short but I think I'm having another one like the one on this video, keep up the great work!!!
you have a very good and sincere manner of explaining ... i ve been following your channel for quite some time now .. thank you
just a side note though ... you mention "voltage injection" as the method you employ to find the short .. by heating of the component thats shorting ... however ... should it not be "current injection" actually ... the voltage is irrelevant ... as it will fall depending on the powersupply and the current drawn by the short ... however it is the current that is being injected ... to find the component that gets warm/hot
actually it doesnt matter what we call it 😊 only that every time i hear it i correct it in my mind
I dont understand why youtube need couple of years just to directs me to your channel.
me too
You are really the best, your explanations are unique and it makes the work very interesting to understand. Keep it up Adam. From Ghana
I like this method, going to give it a shot. I'm not reading much of a short from the charge port, but definitely a lot of smd caps straight to ground on both sides in the same area. Just having a hard time finding correct pads to inject from!
Great job! I usually start pulling out caps and see if it doesn't beep anymore but this might be a quicker way to find the short
Hi there , just i wanted to say thankyou for your tutorial video , your explanation was very easy and understanding , please upload more like this video . it absolutely for beginners . your explanation was amazing . keep it up . thnx
Great fix Graham! Thanks for the educational videos!
I actually learnt a lot from this video. Thanks!
This is sooo awesome! First video I watch of yours, I don't know how many you've got, but I'm going to watch them all this weekend 😎. (Can't right now, got to go tell my friend the bad news about her HP Envy 13... 😕)
interesting, informative and knowledgeable.. keep it up dude!
Thanks 😊😁 once again ❤️
Sounds like you could really use a thermal imaging camera to find any faults on a board like this. Inject power, point the camera at it and you can find the faulty component straight away.
Yes good point
I am learning so much on your channel. Thank you
I’ve got a pile of dead boards next to me because I’ve been trying to figure this all out - but I’m making progress!
If you have a dead short on a mobo, The quickest way to find it is let it have as many amps as it wants, Then put some lighter fuel on any Suspect areas. The excess heat from the hot shorted area will quickly evaporate on any hot suspect components.
Unlimited amps isn't a great idea - excess heat may damage the board. If the shorted component goe sinto melt down, it may weld itself to the board, which then increases the chances of damage when removing it, and so on.
I generally expect to find a fault at around 3-4 amps these days, but going higher than that is potentially asking for trouble.
@@Adamant_IT on occasion ive been up to 5a - but you have to be quick as you say.
It is interesting, how that tiny SMD messes up things 😁
Hp boards have little balls of solder that work as power supply separators so u just get them off the board and all zones of the board get isolated, the finding the shorted zone is way more easy
Basic question: as the short was on a secondary rail and all the mosfets were good, I wonder why you can still see lower resistance on the DC jack input. I would have thought that the mosfets would have prevented the short from travelling back ( even though with a weaker short reading than on the fully blown rail).
Yes i still get confused when he goes on different bits of the board, i mean i think i got from this video is supposedly one of the elements was collecting the heat or elc and not moving it on to the next bit.
Then he fixed a element then the moving of heat or elc became the correct circuit again so the battery and charger worked again.
thanks, i repaired mine now.
excellent video on power injection
Great work but maybe you should change the two capacitors the bad and the good one too by the same size and color
Very Good, Keep the Videos coming, thank you
thankyou for that idea sir, Godbless🙏
Great video. My HP Envy 17-ae101 laptop has just died on me and I think it's a short circuit on the motherboard, and it looks like it will have to be replaced. It's a £1500 machine and I've had trouble with it from day one. One thing is certain though - I'll definitely never buy anything from HP again!
your very good teacher
This came really really helpful
Thank you.
Just fix an HP laptop with your video thank you!!!!
Thanks for sharing
Hi bro
I have issue with my hp pro book 6550 b laptop
The charging LED was blinking 8 time
When I press power button
Mother board is not turn on
Hp probook 6550b laptop
I did RAM cleaning
Additionally components disconnection
Charger was good
And mother board voltage is 19.45v
Help me
Love your work bro
It's easier to remove small smd capacitors like this with soldering iron with a blob of solder on the tip . Just hold 2 seconds and it will come of . :)
+1 sub, good job
Thanks alot.
Bro you really like to play video games with these computers intestines hahah
No microscope? You gotta get those buddy but you are very good at finding the issues.
I pledge to ur teachings
My lenova ThinkPad red power on and no display but the cpu makes some clicking noise when battery in and charger and no noise when battery out
Great job 👍 And thank you for sharing the info..
How many degrees in Celsius you did set up the heat blower? I think hear 120.. but that is a bit low I think.. Once mate bring some Zen book that went in total "zen" mode. And when try to get some capacitors and mosfets out I have to put almost to 400° my heat gun to get result..
All that new tech have lead free solder so it is pain in the a$$. And I guess because is hard it also crack the ball solder points under the CPU and board end up dead...
Now at my desk is one HP envy that look way different that that, but has power, charge.. just when you push start.. board start but no picture at all.. I presume the CPU have crack solder or it is already in "zen" mode...😂
By the way you can buy not bad thermal IR camera for about 180-200£ that will help you detecting of heat emitter on the board.
your very intell man like how you think and your option turn out at the end is very diffed and intell like how you do things far beyond my intell
So a good way to start finding faults is to check the resistance on the power jack and if its less than 40 kΩ then there's something wrong in the board?
Hello sir please i need your help, i have hp pavilion dv6 no power no charging light and if i put the power cable in the jack then it touches
I can understand dual phase voltage supply on AC, but how does it work in DC? 5v is 5v is 5v. I don't see how a steady, smooth DC would benefit from layering another steady smooth DC over the top of it.
bravoo..great videos, go on...
bdw super informative videos
Gracias Doc .!!!
that is checking resistance thru your body not the laptop. you can not be touching both test leads, or the wires youre testing or you get a false reading
Nice video
other technicians used Schematic to locate the problem.
AdamantIT: uses Adam HeatHandFinder technique. hahaha! nice job sir, this gonna be the best bypass giving you no headaches.!
Thanks for this. its really good. I have a Sony vgn-aw11m that's heats a lot near the Hard DISK. On the other side of the board there is an intel chip. Wondering the Problem and a Sony vgn-aw11z that powers on with no display. Diagnose for me please. Thanx for you work
i have this problem but are afraid to try it myself incase i screw it up
God damn, why not make a patreon account and get the people buy some tools for you. I really disturb when you go to solder something. And please make some fume extractor for your safety. 👍
We need more and much more..thanks
Hey do you have a video for Legion y530 ich ? I have a similar problem for my laptop. No power and no charge light
Why not use a thermal camera to see the hot component when injecting voltage?
Nicely explained. Thx!
Hi am David from Ghana and my hp 15dw3033dx motherboard is dead. Can you do a video on that?
At the 5:50 you are checking the ground. I have an ultrasound device and it's not detecting the probe. When I check the ground it's not connected. Is it SC in somewhere or what? Any idea?
I have a problem. screen's lock. I forgot my mobile code Can you unlock iPhone X Max?
I found an hp pavilion x360 with 180 ohms on the input jack and it cuts out the charger, could it be the CPU? I measured 4 coils near the cpu, 2 of which had 0.6 ohms and one has 4 ohms and one has 10
Hi, we have an old HPEnvy x360 13 ay000na. It won't turn on and no charge light.
Considering copying your methods as the computer hasn't been used for a few years, so feel we have nothing to lose but not your its for amateurs like us. Any opinions please.
Can you make a viseo for no display problems please sir
HD1 flex cable connector burnt, please please need the 12 pin pinout, I have identified on the board from left to right [1234567sata,{8?,9?},10,11,12 5v]. Pins 8,9 unknown? Please help thank you
Man you always get the lucky one's LOL every single short i got is a dead cpu drives me nutz (or im nutz but i inject and the cpu gets warm nothing else) Do you get many of those on HP? i got a rework BGA station i remove CPU and short gone lol damn cpus cost more than a used board so stupid for me!!! I try to buy some of the AS IS boards but some them dead cpus to LOL
Nice video.
I have similar problem HP Envy, no power & no charge light. But when I measure resistance at the charger its open. I have checked the dc jack to see the voltage is coming to the motherboard. Appreciate any troubleshooting tips.
I assume there was voltage going into the mobo? At 7:20 you can see me checking for short circuits at the 5 and 3.3v regulators, simply by checking nearby capacitors. Start by finding those regs on your board, and checking (powered off) if there are any caps nearby that measure ground on both sides. If there's no short, plug the board in and see if you get charger voltage around those caps.
This establishes if the main power rail in the laptop is actually online, or if it's shorted.
@@Adamant_IT thanks. Will try
i have been trying to see what type of cameras system you use to examine the equipment you repair?
I please can I use capacitance PF15 for PF16?
I think my envy 360 is having the same issue as thing.
It gets no power no charging nothing at all.
How much dose this repair cost?.
I live in Portland Oregon area.
4:35 I was getting 343 kOhms. Can anyone explain what that means?
Maybe you should solder a new 2nd capacitor as you should and then get more than 100 kOhm resistance between DC plus and minus pins ?
i really wish i had you laptop problems, i have 3 boards all high end, Alienware 17 r4 it did have a short to ground fixed that but it cooked a IC which im waiting for and also a fet, then i have 2 g751jy no short to ground and one i really believe is just a gonner, and the other boots up then turns right off after 2 mins either its a corrupt bios or the batt because if i try to attempt a flash in bios it says the batt isnt connected and its connected anyways good stuff learning so much really wish my boards were a short to round though i got the never can be fixed problems
I know the feel... I wade through a lot of fails between the wins. I want to share fail videos as well, but often there's nothing to learn from an hour of head scratching followed by "I have no idea what is wrong with this."
@@Adamant_IT omg good news though i did fix 1 of my asus boards last night after 10 HOURS!!! spi eeprom programmer exp2019+ c=kept corrupting the bios flash then i flashed with 25q64FW instead of 25Q64 the laptop is now working thank you so much for all ur lessons i fixed this board because of you and what i learned thank you !!! ps the other asus board i have pin 8 on the bios is shorted to ground and can you take a wild guess as to what is grounding it lol leads right to the chipset is a gonner as i figured it was
Nice video.
For $0.003 why not replace the chip capacitor and return the device to factory specifications? Radiating RF is annoying and costs energy, but spikes can get picked up by signal traces and cause intermittent errors as well.
And what value do you guess for said component? If you don't have a schematic or spare donor board you've no way to actually know, it's not like you can measure the value of the shorted one. Even when you have a pair side by side, the fact they're the same package/appearance, doesn't mean they're the same value.
Hi morning m laptops repair amateur and wanna buy simple and cheap soldering equipment any advices pls
Brilliant video. What device did you use to inject voltage?
I have a dell 7000 laptop it wont work anymore in ac power only
Pls start another seriess
Graham, what is the reason you did not inject at the power supply using your salvaged power cord? As the power supply sees the short, it would be a lot faster than soldering in wiring at a specific point.
You have to bypass the inrush limiter (pair of mosfets in series with the DC jack) because the laptop's power management chip will detect the short and cut the power. If you inject behind the inrush limiter, it can't block you.
Greetings. Great response, it makes perfect sense.
Can you remember whether there looked to be room for another 2.5" drive in there? When I bought mine they all came with an SSD for the OS but there was an option for an additional 1TB 2.5" HDD which I didn't bother with at the time. I've got a spare one now and was thinking about opening mine up to see what I might need to add it in, but from your video I can't see where HP would have put it in!?
Depends, you'd need to check inside the laptop anyway. I've seen lots of laptops that have room for a 2.5" drive, but no connector for one (spot where connector should be is unpopulated).
Thank you sir❤
1. On the board you were working on how much would a replacement board cost if available? I just wondered if it would be cheaper than the time to repair the defective board. I worked for a non PC company and most boards we would toss rather than fix them as the time to fix it was too near the cost of the board and we would warranty the new board but not the board we fixed.
2. On your other videos it appeared that on a laptop you were not changing the thermal paste on the processor while you had the laptop apart. So I was just wondering if you do and don't show that as most people who could get the laptop apart without breaking something would know how to do it anyway.
1. Depends... usually refurbished mobos are available between £100-200, which is usually cost-effective, but more expensive that repair. The main thing is that the profit margin on my personal time is higher than spare parts. So even if spare parts are the same cost as repair, I'll make more money repairing it.
If you're paying someone else, it might be a lot simpler to replace.
2. I tended to be a bit lazy in older videos and either not bother, or not have paste on-hand. Generally it doesn't make a massive difference, the important part is that there _is_ thermal paste. These days I just replace as standard, and I've got myself a better supply of replacement paste.
Awesome! :D
When you measure the resistance en the cord which values correspond to each failure? You say 100kohm would be normal. And 40 is a short but not on the main rail. So a short in the main rail how much would it be?
Main rail should be high-resistance, anything less than kilo-ohms is a fault, a proper short is 1ohm or less. This is very generalised though, the CPU and GPU will both read as very low resistance (0.5 - 3ohms) so if one of the power mosfets has failed short, you'll see the low resistance of the CPU/GPU on the main rail, and that skews all your readings. LFC#284 is an example of this, although it wasn't a super low resistance.
@@Adamant_IT thank you, I'll see that video. I started repairing boards a few weeks ago. I'm in process of watching all the videos of this list.