HP Spectre 13-4050 No Charge - LFC
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- เผยแพร่เมื่อ 25 พ.ย. 2020
- Board repair today! Not all short circuits stop a laptop from turning on...
Aneng AN8008 Multimeter - Associate Links, might be cheaper from non-prime sellers if you're not in a hurry!
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I am a HUGE proponent of electric screwdrivers of any type. Whenever it is possible I use power tools for screw removal. I spend aprox 30 years swinging and a hammer and my wrist/elbow/shoulder joints are pretty much filled with gelatin that used to resemble cartilage. Save your body from repetitive motion injuries ANY time that you can.
16:13 me when I should be looking for a job
"where's my alcohol"
i feel that
I drank all your Alcohol sorry about that
When your job involves removing and replacing hundreds of tiny screws on a daily basis, an electric screwdriver is less of a convenience and more a health & safety necessity.
HP & DELL techs = Tin Men
You're words should be used as universal quote in repairing community
@@Crazy--Clown I can hear the creaky wrists from here!
Exactly! And I can't imagine working on anything all day, every day, and being limited to hand tools from a time perspective either. I mean, can you imagine someone telling an auto detailer they're lazy for using a buffer? Or a framer for using a nail gun? Seriously... it would add a ton of time to their workflow.
@@TheGameBench True. You wouldn't wander up to a guy in a JCB and start calling him lazy for not using a shovel.
Normally the diode across the rails is for transient suppression (Zener ). Input protection is in series with the positive rail.
When I was working for HP as a field engineer, I worked primarily on laptops because I was the only person in the area that could fully disassemble a laptop, replace the board, and put it back together in 30 to 45 minutes depending on the model. I sure as hell didn't do it with a manual screw driver. When it's your profession, it's a necessity for various reasons.
good job.I have several of your videos and am impressed.You explain things in a very understandable way
im so glad i found your channel. There is so much to learn. Greetings from Germany.
Excellent just came across your TH-cam site by accident and I have leant so much and find all your videos very interesting. Your knowledge is excellent and you explain it well
Great job, always learning, keep up the good work!!!!
I see his work in retrospect (without a thermal camera). Admirable repair young Graham, it would be unfair, after watching such videos, not to recognize it like that. Sincere congratulations. All the best.
I had a dead short at the charger input on an Envy 23 this week and I did voltage injection. Like your example, the shorted capacitor was nowhere near the input, which was a surprise. It really does take the guess work out of the process no matter how well experienced you are. Nice job!
18:02 look closely between the power plug and the keyboard plugin(I think-big white plastic connector). The is an arch of separation between the edge of the board and inner of board. That is the hidden trace to the ceramic capacitor. The trace goes under the keyboard connector.
I watched this video with laser-like focus the whole time - fascinating.
Hi there , it was very informative tutorial video . thankyou to zoom in on the mainboard to allow us to see with all details . keep it up . thnx
Well Done Graham!
21:20 you forgot to put back the capacitor on the left off of the DC port pins there are 2 horizontal pads there. Right by the huge ground pad you put solder on during testing.
nice work on it that great
Happy Thanksgiving from the U.S.
great work 👏
by using voltage injection i learned from you, i've managed to repair my sister's old Acer laptop which was shorted when its DC adapter plugged-in. and guess what, the shorted cap location is far from the DC jack too.
so big thanks to you Graham for share us that technique. 😉
You've achieved one of the world's most difficult tasks: become a hero to your sister! 😃
@@ThePhoenix198 ow yeah! 😆
Nice work.
I love your electric screw driver!
Please give us more basic videos like this thank you sir ✌️✌️✌️👏🏻👏🏻
Great job
i use a driver like that my self great video keep it up realy enjoy them
I sure would like to see you do this with a couple of cheap video cards. I have purchased a few broken boards from ebay trying to learn the basics of trouble shooting and fixing them with no success! Thanks for the videos.
The last 3 pins are "clock, data, and temp" lines. As always good video. 😊👍
Good job brotha!! My thought is : When in doubt VOLTAGE it out! Haha I wish I had schematics for all the boards I work on. It would make life a lot easier sometimes. Great video keep it up 😁
This happened to my exact one a few months ago!!
Well done graham :-D
You have had some real hum dinger power faults on previous boards.
I was thinking similar to you, it has to be in that little square... Nope!.
So that dead cap may have been the input to the charge circuit.
Yea, while I was reviewing the video, I did spot a Via below the mosfet I removed and near the cap under it - that's probably how power was getting over to the other area. I still think the faulty area was managing the input mosfet. But yea, weird layout, they kinda just crammed the DC stuff all around where they also wanted to put CPU and CPU vcore. Weird board.
Thanks!
good job
Thanks, Adam, awesome video as always. Can we know the model of that camera you are using to film what you are doing on the computers?
hi bud thanks for the great vid
I got a bone to pick with you. Lol. I saw your game max builds. And liked them alot. But I can't order no parts cause I unfortunately live in the u.s. which is unfortunate, but I deal with the hand I'm dealt. Lol. I hope to see more of your custom builds and fix videos in the future. ✌
Loud cars and MCs speeding past is a bonus.
I can see a via, not sure, below 1st inrush limiter (a mosfet) and left side of the cap 12:45, through which the dc jack voltage is connected to the shorted cap removed. As adamant said it might be as a supply to control the 1st mosfet there or something else there.
5:32 lmao! Let someone say that after doing this day in and day out for years, that electric screwdriver is saving us from more carpol tunnel
Adamant IT here in Australia mate they will not repair the motherboards they make you buy a new one sow i repair them now but i use a big magnifier as my eyes are not what they where thanks for another top video stay safe mate
Awesome video, and it's been two years... but.... You missed a cap on reassembly...? The one you removed at 13:14. At 21:54 it is still missing.
5:42 C´mon! the electric screwdriver is the best that happened in the last years. I have the version with 2aaa batteries, i would love that mine have usb port, i use it in EVERY work
Get a Jakemy, yours will have slow rpm
Graham please do laptop charging complaints & not changing, charging sections videos
Hello
I want an advice from you about changing a power ic, from a "gpd win2" device.
Sounds crazy but i do a lot of screws and still only have manual ones i just prefer the control and not a fan of bits going into screwdrivers prefer full screwdrivers
what scope/cam are you using to view that board as looking to get a replacement stereo or tri scope
Why do you never use the powersuply? you often immediately see whether there is a powerdrop and / or of using the laptop power!
Great video. Are there any “rules” surrounding what volts / amps you consider safe for voltage injection? I wouldn’t want to Chuck too much into a motherboard and inadvertently fry an expensive component on it
These days I start at 1v 3amps limit. While in a dead-short, the volts should stay close to 0 indicated. In this case there was still some resistance, so I had to push up to 2v limit, which then got me up to 1.6v indicated, limiting at 3amps.
Since we're current-limiting, the voltage never really goes very high. But it's best to keep as low as you can, in case the short isn't where you think it is and you accidently bang 5+ volts into a line where you shouldn't.
I have the same laptop and a capacitor cracked in half in the same area. Thanks.
a che temperatura tieni la stazione ad aria calda? e se posso chiedere che marca e modello è? weller? grazie
Hi. Can you tell me what's the type of camera what you are using above the board? Thx.
I have also the same laptop like in this video. This is my first time using the multimeter. I did the same like you did measuring the DC jack with the power on and by me is measuring from the DC jack cable 19.72 so it's a little bit less. I dont know if that's the problem. Also you measures the non ground pin from where the DC jack is connected to the motherboard, I also measured that but it's not beeping to me. I also followed another video from you and you did a different measuring method measuring with continuity mode the coile power supplies to the motherboard which you got bad results of low ohmns. I tried also measuring the coile and multimeter is giving me different numbers from m ohmns to k ohmns and go back to m ohmns again and down to k ohmns and so on what does that mean? I also tried to measure with continuity mode again the capacitors around the motherboard but its not giving me any beep sound to non ground. But there where little capacitors not giving me any beep sound to both sides. I dont know if it normal to some of capacitors. Do I something wrong? What could be the issue here and how can I fix it?
I watched your video so many times, I like the way you work. I have the same issue with my laptop and B20N03 CGL0390 mosfet looks burned-out. Can you help, please?
Voltage injection saves a lot of time. 🙂👍
You definitely have the knowledge of what you are doing now all you need are the proper tools believe me you need a good a soldering iron ( JBC or HAKKO FX951 ),heat gun ( quick 861dw ) and the most important tool a MICROSCOPE 🔬 doesn't have to been an expensive like amscope now a days there a lot of cheap alternatives for around 500€ with light,camera,barrows lens.
One tech to another.
I am having the same problem and when I check continuity on the capacitor that you replaced it beeps on both sides. This is saying that it is shorted correct? Also what size did you use to replace 10nf? I saw the code on your strip was 106.
hoping to see a desktop pc lfc soon :)
sir I am a big fan off you
I say goodbye forever for your VICI 99 multimeter :))
Still got it! Just wanted to try other models out as well, get some experience with different units.
Where do you get your schematics?
You forget to re-solder tiny cap back on left corner of the board.
yep it would appear he didn't
Yea I actually found it on the bench this morning when I turned everything on to do the thumbnail picture!
Laptop hadn't been collected yet, so I sorted it this morning.
@@Adamant_IT Happens to the best of us the number of times I strip something down put it back together and Where did all these spare nuts and blots come from that are left over:-)
@@Adamant_IT 13:10 2 tiny caps !
@@Adamant_IT Yea the "bench" is where parts go to become lost n forgot LOL I use suitable small trays these days. Good one is small art paint pallet, six wells and white easy sort and easy see parts too. Good 99 cents item to has.
Do you not have a thermal camera yet?
Hi i have a similar hp laptop envy x360. It can power on with battery but no charging lights and cannot detect charger. There is no deadshort on 19v input .Tried following your guide on finding shorted caps but cant find any. The 19v can reach the charging IC 9538bh, but output only 1v to the board. Can i assume it is a bad charging IC?
Thanks a lot!
The diode selecting battery or net power
Adam what camera do you use.
Can you tell brand and model please ?
Bench cam is a Logitech Brio, face cam is a Logitech C920. They're both horrifyingly expensive right now though, so I couldn't recommend them at current price. Bad time to be buying webcams unfortunately.
Lol about the screwdriver. 😂👍
Can you provide a link where to download macbook testing tool, please
Kindly tell me how u know the DC jacket terminal e.g positive and negative terminals ? And which wire and liquid you are using for cleaning the mosfet terminals after removing the mosfet?
The wire is regular leaded flux-core solder. I know which terminals are positive and negative by observing the wires from the DC jack, red for positive, black for negative. You can also figure it out just be measuring and observing - if I find -19.5v, then I've got the positive and negative the wrong way around.
Oh Graham, it is a _reverse, zener, one way, rectifier, electronic doodad thingy diode_ . Good heavens man, get with the program. 😀 Don't let the critical bastards get you down. 😎 Remember, those who can *do* and those who can't _watch TH-cam videos and as a result are experts_ . An expert of course is a person who can't spurt anymore hence the ex part. 🤭 Let those prats try and produce videos and see how they would go and we both know they couldn't do it.
Like your work and please keep it up. *Thank You* , from a grateful subscriber!
Please what is the rating of the guy (I think diode) just in front of the mosfet that you remove. I have a similar problem but that guy(diode) Is causing the short-circuit.
I have a question
one that no tech guy could tell me exactly what is happening
oh pls pls respond
thank you for your videos and for your response if anny heheh
so I have a zotac nvidia gtx 1080 amp edition !
windows 7 and windows 10 tested this
so hmmmmmm how to start
the card is working but let's say I wake up in the morning and I start the pc
I see on msi afterburner saying 34c
the system is idle with 34 processes so no latency or crap like that, even latency moon pass it
but at some random time in gpu temp in msi I see a spike from 34c to even 29c for a 500 millisecond
now at this point I have to take the card from the slot and put it back in pci slot
and problem solves itself till next shut down or a few hour turned off
it's annoying and I think there is a interrupt in the system when that spike occurs but can't really detect it !
tried an 1080ti and 1060 and they don't have this problem
we have no idea why that happens !
bad cap maybe ?
thank you : )
edit 1
different drivers and old ones tested
all drivers are ok
no conflicts
no errors
no funny lines or sings of bad rendering
not using it in full load so always fps cap set up
no overheating
tested it on another mb and same result
even after getting heated same problem
all pads looks ok
other gpus work ok
untill I don't take it out the slot and put it back the problem will not go away !
edit 2
setting msi ab to monitor only the gpu temp set at 100 millisecond
and I can see the spike for that 1/10 of a second
I take the card out and put it back, bingo is working till I turn off and restart the process of starting and then again spike and then I take and put it back in slot
edit 3
even changed the paste
can't see a defect on the board or a burn or anny strange things
edit 4
thank you much : )
@
Adamant IT where/how did you learn to test motherboards, worked in a PC repair shop 6 years never learned how to do this, just replaced the mobo.
TH-cam. I'm absolutely not the best by a long shot, but there's a lot of repair channels like Eletronics Repair School, Northridgefix, Louis Rossmann, place like that who do board repair like this all day every day.
I look at one a week or so, since a lot of stuff I see it's easier to replace the mobo. But yea, occasionally I get a board like this that's within my ability.
@@Adamant_IT That is awesome! Yeah, I been watching Louis videos for years, I will check out those other channels! Thank you so much for taking the time to help me out! Your videos are awesome!
Hey, what if the laptop charges but won't power on. When I press the power button nothing happens. Even the power button doesn't light up. But when I long press the power button, it the power button flashes. I have the same laptop as in the video.
Idea for a drinking game - Take a shot every time Graham says “however” !
on the left bothem corner righet above the white connector you remove cap but don't stick it back ?
you remove it at 13:14
16:43 Because it’s a HP! 😂
Hi, just saw your video I have the exact same laptop with the same problem. All the sudden it just didnt turn on anymore.. Can I send it to you ?
No it's not absolute that capacitors of the same size are the same value but you are 100% correct in guessing that it is highly likely. If you can count one 1 thing it's a manufacturer's desire to make money. Making a bunch of any item the same exact part saves money off the BOM.
With Thermal Imaging Camera your life would be 100X easier, you just plug in the DC jack and find that shorted capacitor .though the good ones are not cheap .
keep posting repair
1:01 lol sports car/motorcycle reves
Why Didn't you not check traces on the other side of the board there ls more power traces
put a link for the rechargeable screw driver you are using to.
YZH Mini Electric Screwdriver Cordless Power Screwdriver Set with 55 Precision Bits - available on Amazon
Can I use without replacing this capacitor? I removed it and no more short.
Check this video for information about replacing or not bothering: th-cam.com/video/weUAiivaYa4/w-d-xo.html
about that screwdrivwirrrrrrrrrrrrrrrr . :D
My laptop model is hp probook 450 G5, core i5 model, for last 3/4 days my laptop is stuck at 79% charge. When it reaches 79% charge, the battery status bar shows pulgged in, but no charge happens after that. I've updated the drivers & check the battery & AC adapter health by hp battery health tester. What should I do?
Probably a bad battery. Most battery health checks just measure if the battery's measured capacity is over a set value, but that's not the full story about if a battery is working properly or not.
Multilayer boards can be really tricky. Components can be on the other end of the board and on the other side.. Real pain in the A$$
Im curious, is it possible to use a hot air to loosen a laptop's GPU and get a new one?
You need a BGA rework station for that, the chip is too big for hot air. GPUs can absolutely be replaced, but even with the right equipment it's a big job, and finding reliable replacements is tough.
You forget a cap. Really small one next to the connector
Yea I actually found it on the bench this morning when I turned everything on to do the thumbnail picture!
Laptop hadn't been collected yet, so I sorted it this morning.
Where do you normally go for schematics?
Google. There's lots of forums like badcaps and so on where this stuff can be found, just make accounts on all those places so you can download attachments. I wouldn't say this is a super reliable way to find them, but honestly for basic power issues like a lot of my videos, I get further by reading the board, rather than tracking down schematics.
@@Adamant_IT thank you so much for the response!
Sorry but before you even took off the FET I was shouting big cap between the connectors. But I was wrong.
I was screaming at the screen: "This big cap below the mosfet!".
You: remove mosfet ... remove three other caps...
me: oh, finally, that cap is getting attention.
you: remove the cap. -> NO, not this one either!
conclusion: guessing can be a big waste of time, indeed.
hindsight is a wonderful thing
I had exactly the same thoughts about that cap
7:31 DC JACK
this guy is doing heart surgery but on computers. the precision.
What I find wird is that major makers like Asus had by 2016 started to make their laptops charge via USB, but now have gone back to old style charging ports. Cost saving?
Yea, Type-C Power Delivery is much more complicated to implement. It's slowly tricking out there though.
I'm sure you have been asked this before... but how do price a job like this?
Basic power faults like this I charge £80, which lines up with the kind of prices you see advertised from other repair shops on ebay and the like. If it were a more complex repair, or needed more expensive replacement parts I'd charge more. But I don't personally feel that my skill-level is up there yet.
👍👍👍👍👍👍👍
i love you
if you had the schematics......why didn´t you look for the value of the capacitor there?
I didn't trust the schematic I had. The IC next to the failed cap was labelled as PU2, but the schematic didn't have a PU2 on it, and PU2 on the board didn't have enough connections to be the power management chip - so far as I could see. So in short, I had no idea where I was on the schematic.
I had the DC jack circuit diagram in front of me, but even that was showing loads of stuff that literally just wasn't visible on the board.
are infrared thermometers usable for this?
I don't think an IR thermometer has the accuracy needed. Injection works by getting a single component to run hot enough that it can't dissipate the heat, so the board around it will usually be lukewarm at best. The IR thermometer I have is only good to the nearest inch or two, which doesn't really help find an 0803 capacitor.
Thermal Camera makes this a lot easier, but I'm still pained to spend £300+ on something that my fingers can also accomplish. I'm thinking of picking up a second hand CAT Phone with the built-in thermal cam as a poor man's option.
@@Adamant_IT thanks. maybe a lens modification? like a zoom lens you might strap to a smartphone.. is that crazy?
@@Adamant_IT BigClive got a new phone, maybe he will let you have the old one that has IR camera. 🤔
almost sure it called TVS DIODE