The most common fault on a laptop charger power supply
HTML-код
- Опубликовано: 1 окт 2024
- UK Ebay store: www.ebay.co.uk...
US Ebay store: www.ebay.com/u...
WebSite: sorinelectroni...
Patreon support: / electronicsrepairschool
RUclips Members: / @electronicsrepairschool
Forum: forum.sorinele...
Discord: www.sorinelect...
My tools: www.amazon.co....
PayPal me: www.paypal.com...
This is great information and in fact this is the exact reason why I always leave the AC cable plugged into the block. The laptop I am using right now is a 2009 HP Pavilion DV7 and it's still using the original power adaptor and the AC cable has only been out of it maybe 3 times since it was brand new. I also always tell people to plug the power adaptor into the mains BEFORE they connect it to the laptop just in case. I've seen a few laptops die from power spikes due to a bad charger when plugging into the mains.
I've always done that, and still, my old laptop got shorted out from a bad power unit and I had to buy a new power circuit because I couldn't fix it.
ASUS chargers are only good for 18 months then die. I have got through two!
Dell chargers are good for 17 years +. HP charger, 11 years old, still ok.
I have an ebay charger for the ASUS which now has a broken wire in the plug. Gerr!!!
A fault that I find just as commonly is that the mains lead is kinked and and one or more of the conductors is broken because the device is pushed up against a wall by the user.
Even if you have the money to buy a new one, throwing the old one away is contributing to the problem of e-waste.
How do you open those chargers and so neatly? They are pain in the ass to open the plastic casing...
Don`t get me wrong,but most company IT admins will just throw this kind of not working chargers away.
First thing - even if some of them try to open charger - that casing will be FUBAR at the end,so none of these people will loosing time with it.
Or tell the user to reboot the system 🤣
Incredible ! the charger box was opened by miracle ! What the most hard thing. LoL. Thx Sorin
@@omarhamani2126 In the same way as to remove the battery stuck in a smartphone? I must try! thank you ! Nice !
I would have cleaned the carbon off prior to soldering with a fiberglass brush. And cleaned the flux and residual conductive carbon off with alcohol. Leaving the carbon there could result in yet another poor joint and also arcing through the carbon track pending the voltage involved.
That reminds me one of my HP supplies makes an arcing sound, if not all - what a shockingly crap way of attaching the mains input to the board 🤦♂ Bit like crappy micro USB ports
I've seen many products with the same issue. One thing to consider is the carbon build up on the arcing pins. I normally will remove the connector from the pc board and check the board for carbon. It needs to be removed.
George B
Make videos about fixing laptop chargers
Yes, capacitor is nasty. Not only I got the shock, but I also burnt the IC that generates impulses and created a fireshow on plugging charger in, blew up the mosfet...
But yes, you'd be amazed how many good original chargers get thrown away because of cable or socket. In my university while we had recycle bin, i've been taking home laptop chargers each day, all of them are original and worked properly. Now I don't know what to do with 20 odd chargers lol.
Ebay at half price.
Laptop voltages are fairly universal (18-21 volts/4-5 amps)
even if the end connectors are not
@@MikinessAnalog yes all my latops operate at 19 volts and i have like 4 of em
Save them as power supply for various projects, I use 2 to power my 2 iMax B6 chargers, and converted one with a step down converter to charge batteries.
There are a awful lot of fake (HP) chargers around with really poor quality. I usually don't open them when they break, but could do I guess.
You missed a pin !!
Those mains connectors have 3 pins. You re-soldered 2 but missed number 3.
Number 3 also looked like a dry joint !!
you missed the third pin on the charger connector. you should have re-done that too, because it is likely also weak from the wear.
@6:09 you can already see a faint ring around the third pin as it is starting to fail also
Yeah. Don't bother cleaning the burn residue before soldering, neither removing flux afterwards.
Can you post a video on how to open a laptop charger plastic housing, i tried a few times and all end up damaged the housing badly. How did you do such a nice job?
You squeeze the case in a vise. You squeeze it until you hear a crack. But don't squeeze so tight you're squeezing what's inside the case. If you don't get the crack flip the case in the vise and squeeze the other side. If that doesn't work then you have to squeeze longways. If that doesn't work then you have to hammer a screwdriver into a corner and twist. If that doesn't work then you have to chisel the seam. If chiseling the seam doesn't work then you have to break out a hacksaw.
It was a short video but was very helpful 👌
Frankly, if you do a bit of dumpster diving, you probably have more of those power bricks than you can shake a fist at.
Why pull out that end of the cable? You put that end in once and then you never unplug it again. I always unplug the cable from the wall 😁
Excellent video, thanks. How did you split the case of the power supply? I've often found them to be welded together!
We use a Dremel
I crack the cases open by squeezing them in a vise.
When an enclosure can't be pried apart, I've sometimes been able to open the seams using a very sharp chisel and careful application of moderate hammer blows. It depends on the customer - if they are satisfied with functional but ugly it makes things much easier. Just crack it open any old way and tape it up when done. Some customers will be happier with a more expensive replacement unit than they are with a cheaper but more obvious repair.
Knowing how to repair things is sometimes less important than understanding customer expectations. Actually, way more than "sometimes".
@@Thankz4sharing I've done the chisel on the seam thing myself. Sawing can work too. If you're very careful. Usually they just split on the seam. The ultrasonically welded ones split apart. Some are tough though.
@@1pcfred Good point. A fine tooth bow saw is handy. Probably a good idea to wear a mask. Some of that plastic dust is nasty.
Во-первых, разъём с тремя выводами, значит и пропаивать надо все три.
Во-вторых, нагар надо счищать потому что он проводит ток.
How to open it? Very good trick is to apply petrol(gasoline) or diesel using syringe.
Put small amount in that hole-lines around the charger (it will spread out automatically by itself) and then wait 2-3minutes. Then you will open it very easily by hand.
(when you play with petrol/diesel - remember to open the window to provide fresh air)
its easy to open a copy charger
I hated opening them so much (to the exasperation of saying "nice words" in my native language) that I had to buy a dremel. Thank you very much for the tip. All the best.
@@carlosgarciaoropeza5480 people here keep saying they use a Dremel but high speed tools don't cut plastic too well. They just melt it. Most of those plastic cases you can open by just squeezing them in a vise. The plastic weld cracks then. If I can't get the case to just split apart as a last resort I'll use a hacksaw to cut it on the seam. Once I get a nice slot going I can get a little pry bar in there and get it to bust open then.
@@1pcfred Dremel SC476 SpeedClic
@@carlosgarciaoropeza5480 rotary tools really don't like running slowly. The cooling fan in them doesn't work so well when they don't turn at high speed. I blew a Dremel up once cutting plastic with it. It overheated and the magnet in it split. Damned thing flew out of my hand when it let go. It's really not easy to design variable speed electric motors.
lol like new with black tape great work sorin
Right as usual! Also once you touch the charged 400V cap you will never do it again, trust me guys!
Did that last week, half an hour after unplugginga board to the mains I thought it was discharged, and zap. Then I checked, still had 120v.
so is the charger 3 phased, capacitor getting 400v from 2 phase. or is there a boost converter inside charger? how does it get to 400v if main supply, 1phase is 230v?
@@TomiBorchert multiply it by square root of 2. the most distant points of the sine wave. so the cap will be charged to this voltage after rectifier. cca 325V DC!
At my high school - a vocational technical school - it was a popular prank to charge a capacitor to a hundred volts or so and toss it to someone to catch. I learned from others' experience and refused the offer to catch anything. :)
@Tomi Borchert 230-240vac is the RMS voltage, not the peak voltage. Plus, the capacitor voltage needs to be rated higher than the applied normal working voltage. There will be a safety margin.
Ofcource and its much better for the invironment instead buying new trashy charger...Well done!
Just to add something to an already extremely useful video: I usually use cyanoacrylate glue so I don´t have to use duct tape. It´s extremely fast acting and the bond is strong. Use ONLY the necessary so you don´t seal it so much that you can´t open it anymore. It also burns plastic so try to avoid drops of it on the visible parts of the charger. A q tip always helps if you want to make it look as good as new.
aww you didnt show us the hardest bit of opening those darn cases of the chargers
There is surely carbon accumulated on pins, do check it...
third leg of 220v socket need to solder.
Yeah, there was visible "rounded hollow" around the third pin also... Everytime I do all 3 pins even some of them look OK.
You may also glue the connector for better strenght.
He also could clean this PCB ...
Right! Some hot glue does wonders in order to get the output cables steady and free from separating from the charger ♥
it is a fake, real one plastic is fused, it can be opened only by cutting
Replaced 4 chargers till now!!
Sorin I think you soldered the Live/Neutral and Earth but didn’t do the other Neutral/Live pin and it looked iffy as well
Actually for me he has soldered the middle and left pin, look at the tracks 03:32. The right one solder seems good.
Hi Sorin, thank you for sharing of your knowledge. What is the best way to crack open a charger?
One way is to use a vice and clamp it into the vise just below the seam and tighten. You should hear the glue crack as you squeeze it. If it fails to crack open, flip it upside down and re clamp it in the vise and tighten. It should crack. You have to understand that the case is designed where there is a reduced thickness section that fits into the other half. Squeezing the right half causes it to compress inwards ungluing the joint. If compressed from the wrong side you are forcing the two halves together. A thin steel putty knife also helps once you have split the case lengthwise. Ungluing the short ends is a bit harder. If you can see which half fits into the other half, use the putty knife to carefully force down into the end joints. Cheap aftermarket supplies are easier to open than the authentic supplies. Use care, if you slip you can get a nasty cut on your hands and or fingers.
Hardest part of that job is opening the charger, unless its a copy.
Some open easily some are more stubborn. You have to have the tools to do it. The main tool is a bench vise. That alone will open most. The ones that don't just crack open you have to get more aggressive with. I find that attacking a corner with a screwdriver usually does it. But it if doesn't then I'll hammer and chisel the seam. Just walk along the seam with the corner of the chisel.
My partner's laptop charger was playing up and I was convinced it was this exact problem. However, it actually turned out to be a break in the DC cable where it emerged from the unit.
Clean the board before and after soldeing!!
The question is, how did you get the two pieces apart from the power supply?
Usually a flat headed screwdriver and light hits with a hammer or even any other lightweight tool.
This is why i only have old trash. My PC is old, my microwave is old, TV and so on. Because i can't throw them out. I always keep repairing them. :(
It's a bless...and a curse :))
Not only does your laptop not work, but you get a free fireworks display for free 🤣
Thanks for this! I started by checking the voltage at the plug to the laptop, then the wire going to the wall (cheap off aliexpress so didn't trust it). I opened it up to check the caps like another video said, but mine were fine. It ended up being the same pin in my charger so soldered it up and good to go!
Butchered the Hell out of the plastic though. That case was NOT meant to be opened ever in its lifetime. The plastic was softer than the glue so it wouldn't pop open, just bend and rip the plastic. Ended up cutting it with a Dremel cause I didn't wanna screw around anymore
How did you open Charger without damaging it , Alcohol ?
A flatheaded screwdriver & a hammer will suffice. 😊
The real problem is mechanical stress. It lifts the PCB pad, overheats, burns out. Only happens on cheap PSUs without flexible cable from socket to PCB.
yes, this is a copy .. the genuine HP psu has brass plates all around the brick from inside with yellow tape and insulation (for prolonged use and overheating) .. you didn't show the hardest part : opening the case ;))
Your problem is that you are looking at a FAKE, counterfeit non HP charger. The genuine HP 45W charger does not have a PCB-mounted inlet socket. The Inlet socket in the genuine part is linked t the PCB by flexible wires. A quick look at your power supply board confirms that this is not the real part. Never risk your laptop with a fake charger. Finally, at 5:20, he says what I said.
I love his attitude, if a charger isn't working, you think we just throw it in the bin? have a heart.
Great picture under microscope now 🤓 btw Sorin are you using paint thiner for chargers or some of your other methods ?
Is it dangerous if I just ignore the sound? And just don't do anything
No, not dangerous, it will simply fail at some point.
Help, i have analog controller Generic, work fine analog on battery usage laptop.
But when i plug ac/dc adaptor to laptop/pc. My analog controller behave unstable , all moving, and some digital button blinking.
I saw this on joy.cpl
What or any suggestion ?
How did you open this...? ?????????????????????
Pretty much half or more of all the stuff I use is repaired. I am the modern society's buy and toss mentality's worst enemy lol
My laptop charger doesn't get touched, it gets mains power at all times, so I don't think I will ever have this issue. It's a fairly new computer too, 2022 model running Windows 11.
What a timely vid giving the emergency on a United flight out San Diego today: laptop/charger fire forcing an emergency return!!
A fire onboard an airplane by a passenger’s electronics!! Today
Nice video, great, but is it really worth repairing the charger for you??? Do you know that repair is more expensive than a new charger??
Repair costs me nothing to do.
@@1pcfred Yes, that's true if you fix it yourself. I meant repair in the service.
@@stanleeebuilder1959 few consumer items are worth having professionally repaired as opposed to simply replacing them. That's the dark side of mass production.
Hello...
Do you know why a battery charger green and red indicator is not working, i mean the indicator always red when its charge nothing... but when i use it to charge battery its still charging but it never get the green light on...
Cause of this charger problem started because some shortcircuit between positif and negatif of the dc current..
So i wonder what is brokenn is diode or the IC chip that control on off of the charger?
I'l be glad if you can give me a clue
Thanks
hello, i have a question
a colleague gave me a laptop acer m52287
the laptop is not working
he tried to charge the laptop with a trotinet charger, i think it has a 48 volt charger
is there any salvage laptop?
thank you
I salvaged so many chargers from friends about to throw them away because they were "not working", most of the time it would have been just a wire short or something like this
When I'd offer to fix them they'd just say they'll buy a new one... so now I no longer carry changers on myself, I already have one laying around all the usual spots
maybe clean with IPA alcohol after soldering, the residues of the spark vapes may be conductive and cause future trouble.
Sorin, how did you open the case with no screws. What is the easiest way?
I love your videos. Just one thing, you cam is a little bit "froggy" expecially the microscope, when you zoom in the view is not Clear
8:13 Some busy scheduled multimillion dollar making electronics loving rockstar still might just throw it away i think. I am the amateur repair type myself.
You're right , i didn't throw my charger away after its not working properly unless i weggle it , after it's stopped working a put in the laptop bag , Never Throw it
maybe you make a video on how to open these type of chargers... i mean how to take the housing apart. thanks
cu un cutit si ciocan merge cel mai bine....dupa parerea mea. le iei pe mijlic la ciocanit si se deslipesc. niste rabdare si gata. :)
That's only common the the house knock offs because the OEM hp chargers don't use the same technology in their chargers
It would be very helpfull, when you show, how to open the plastic cover, without destroying it. Thanks.
Great video! A brand name charger would catch a pretty penny... although then it would have been craaazy glued inside and welded together....
MORE OF THESE VIDEOS ARE OK
One main issue is the use of no lead solder. Do yourself a favor on all of the critical components, add a bit of lead solder to the joint to wet it and then extract the old solder and resolver with regular lead tin solder. It has some flex to it. As for those pins out of the socket I would mix up some epoxy and place the charger upright and add the epoxy to where the leads come out of the plastic. You are right, it is a very cheap copy of the real thing and the quality of that connector is not the best. That epoxy should add strength to the pins coming out of that connector housing.
Thank you for you passion to repair and not throw away. Pax. Steven.
On these chargers another common fault is a break in th third thin wire that connects the sense central pin in the plug, without it charger outputs voltage but laptop will no charge, just trash quality wires in these hp chargers...
Great video. It's the first time l watch content like this in this channel, l think.
As always a great video, manny thanks for sharing your knowledge ❤
Am i Michael henry by I always enjoy your teacher on RUclips I join school team to learn motherboard repair
I'm more interested how opened the case of the charger.
You can crack them like they're a nut. Just squeeze it in a vise. Most of the time it'll split open cleanly. Sometimes I'll hold half in the vise and get in there with a flat blade screwdriver and give it a pry in a corner. Then there's the hold half and work a chisel with a hammer down the seam method. I love cracking welded plastic cases open. So satisfying.
@@1pcfred I always use a screwdriver and a hammer. I will try the vice method. Sounds less destructive than mine. Thank you.
@@ferna2294 some split real clean and easy and some don't. How it goes is on an individual basis really. I give them a squeeze with the seam at the top of the vise jaws half in and half out. Then if it doesn't go the one way I'll flip it over and squeeze the other side. Then rotate it and squeeze on the other axis. Because you can't squeeze them too much. Or you'll squeeze the parts inside. If it's going to go it'll go. Some do and some don't. A lot of them just split right open. The ones that don't you have to work those. I buy adapters at thrift stores. They'll usually have a cardboard box full of them somewhere. They usually cost maybe a buck a piece? So I look through what they got and if any look interesting I'll pick them up. Cracking them open is oddly satisfying.
De-solder the power skt and remove use two part epoxy glue and replace skt gluing it to pcb and resolder
A chinese power supply sold by amazon almost burned my sofa down.
Yes, cold solder, or broken joint. Could have shown this in a two minute video.
Mr sorin where I can get proper education practical and theoretical to be able to make the same job like you
I never disconnect my cables from my chargers. I just unplug them from the wall, or surge protector. I don't know why anyone would.
If you have to transport it in a case or bag, sometimes it´s better to disconnect it, since you remove the chance of it applying torque to the joint with the weight of any other things you might be carrying (like a laptop)
Stupid video. How do i open the adapter without finish desteoying it.
Most charger give voltage in output but no current what causes that or voltage is what mention on charger but not charging
the most common fault on a laptop charger is the output cable[sorry sorin]
I had one of these it shorted the earth leak relay on my switchboard. It went in the bin and I do repair electronics
Thanks you sorin
Can you please make a video for diagnosing a charger
Thanks boss for being there at all time....
What can you say to Dell chargers that says plugged in not charging?
I have tried to know the cause but I guess my effort isn't enough, as I can use your help...
Probably the battery gone if it still powers up using the charger
Hey Sorin, I was hoping you would shows us how did you open the charger in a non destructive way!!
Thanks a lot.
Maybe pop it open with flat screwdriver, some marks are visible.
with a knife and hammer. it's not a joke :). that's how I open them.
@@DarkGT i used screwdrivers before but yeah they are destructive lol.
@@Adrian_Buligadoes the knife needs to be sharp or not? how long is the knife should be?
@@Sht97 Sorin used a electrical tape, it's destroyed in some ways. You can cut it clean with a saw or try to pop it with something flat and thin. You can heat a knife red-hot and make your task easy.
Is your microscope reversing the picture?
I dunno… while the AC jack is a common fault, the MOST common is damage to the cable/barrel jack. I guess it just so obvious when that happens that people don’t consider it worth investigating. ;)
This is not a genuine HP charger, this is a Chinese fake.
I had one not OEM charger that would work for a while and they the laptop would shutdown and the light on the charger would start blinking. Nothing is burned inside it, won't bother trying to fix something cheap that could end up breaking something expensive.
I got a sony led chrger that had no octocoupler. And output 19v not stable. So what could be problem. I tried to repair it. But couldn't. Can you explain about that.
Mine always broke from the plug side. Cable sheath detoriate just under the "plug". E: i meant the low voltage side plug.
i've found the 19v plug to go short because of people tripping over the 19v cable.
I don't throw power supplies away.
Easy money repair..😁😁
Unless HP makes doggy chargers, without good proper input filtering.
I thought sparking was relatively normal for a power supply, but if I understand this video correctly, it means there's a bad solder joint that should be fixed?
This is a great information,I so much love the lecture thanks allot ... from Nigeria ♥️♥️🇳🇬🇳🇬🇳🇬
Opening the case is usually the trickiest part of these repairs. How do you do it?
Other common faults: The DC-Cable breaks inside and the thermal fuse in the charger might fail if you put it under a pillow or something...
i open it by (relatively) gently hammering a blade of knife (small camping knife) the slot / middle part (juste aviod the corner, you will break it). I guess there is a better solution
Place the adapter on its side and place a (butter) knife blade on the seam. Whack it with a rubber mallet harder and harder until it splits. Once you've cracked it open, you can use a spudger or even a large screwdriver to crack the rest of it. Use superglue or zip-ties to close it back up when you're done.
How to open it? Very good trick is to apply petrol(gasoline) or diesel using syringe.
Put small amount in that hole-lines around the charger (it will spread out automatically by itself) and then wait 2-3minutes. Then you will open it very easily by hand.
(when you play with petrol/diesel - remember to open the window to provide fresh air).
Thank you for sharing! I'll try
@@Radek__ I have tried this technique once with lighter fluid and it did not work. I may have to retry using "real" gasoline, thank you.