Hp x360 gaming laptop motherboard repair -How a laptop repair can ruin your day. I hate those faults
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- เผยแพร่เมื่อ 23 พ.ย. 2024
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Its been 5 years in watching this channel and I love it a lot
I watch since 2005
32:15 - I would go back there and measure nearby components. Something there started working when you injected current and heated components. Or moved them with vibration. I see at least 2 resistors half black half gray, like broken in middle.
After you touched 32:19 black resistor, current went to normal 0.07A.
40:24 - Your multimeter got mad at you because you said you prefer power supply over him. So he decided today to fix machine and confuse you.
32.19 is bad just camera lens/reflections. it is possible some electrostatic dust. i ve seen a single dust particle in a server ram slot brought down the server and wouldnt turn on until i blow it off. crazy but it can happen. he may have removed/moved the dust that was causing the short. simple explanation sometimes the only explanation
Maybe it was some kind of metallic dust or a micro solder ball that got dislodged when you moved the motherboard and/or removed the black stickers. You saw that it was opened before, go figure what happened.
Although, the "burn out the short" is probably what happened.
Thank you Sorin
Probably inserting current after the diode allowed you to supply enough current to burn out the short. Inserting it before the diode just caused to diode go hot and take part of the power, so the power left was not enough.
Exactly what i think. There was 2.4v, when i came with 3v after the diode, very possible the short from inside of the chipset burned out.
Could you elaborate "burn out the short"? I am not native english speaker. What you think happened?
@@orion310591RS A fuse is a short circuit. If you put more current than the fuse is rated for through it, the fuse will go open and "burn out the short".
Same thing here but the short is a transistor within the PCH, not a fuse.
It's either that or inserting the voltage after the diode made a cmos component with floating gate get unstuck (discharge or charge the capacitive gate) which made the circuit behave differently.
Putting voltage on the other side of that diode was like jiggling the handle on a toilet to make the flapper quick leaking. Is it possible that inside the diode itself was a whisker and by backfeeding it made the flapper close all the way?
320ma burnt the short open, like you do with iPhone caps when you don't want to separate the PCBs - lol -.
I have had a hot chipset on a PC MB, ie, 65ºC, and it ran fine.
Maybe the diode is going in and out. Had a logic transistor that killed the MB, then it started working again days latter, then it died again more days latter. Changed the transistor it it works fine.
Sometimes we spend a lot of time thinking. I mentioned few months ago one of my laptops going down Sometimes, tried lot of things but ,I changed the power supply for one just less powerful...and it is working absolutely well now. They put so much securities that they themselves don't support the normal current the computer is said working with.
I don't have much of experience but i can say something got burned any way good job well done 👍🏻👍🏻
Very nice video, like always... You are working and commenting in real time.
The only other time I've ever seen this is in my Switch repairs. The first model of Switch (console) has a diode near the fan. This diode can just be removed and all will still function but it should be removed because it can also interfere with other things AND are a common fault. Nintendo actually removed it in later revisions.
Anyway, it will sometimes just stop working and the act of measuring it will make it work again. It's like the diode got stuck via forward voltage or something and hitting it with just a multimeter will make it work again. It's the weirdest thing.
I've had dozens of people call me for repair of issues tied to it and if they already have it open I'd tell them to just touch that diode with a piece of metal. 75% of the time it would work. I can't explain it beyond diodes being weird lol.
Diodes don't get stuck but cmos components with floating gates do get stuck.
i do remember one of ur old videos when u just trigged the gate of the first mosfet with current and then the short has gone magically
the problem was on the diode on the other side...you touch-press it and made the connection possible again until heat make it come loose again!
maybe some static charge build up and gets discharged?
Sorin, I believe we call this type of repair "Short Busting" I think you injected enough current into the diode that was taking 230ma and all of a sudden it was taking only 7ma. You busted through the shorted diode with high enough current. It was under the corrner of the chipset that you initially thought was getting hot but was in fact the diode of the other side the whole time.
Truly infuriating problem, 1 had a similar one 3 days ago. The board had shorted PCH VRM, after replacing the fet+pmic the board started, got into bios, then after a restart never got anything on the screen and post codes were different each time.
The PCH resistance is about third of the nominal resistance of a good PCH (at the same temp)...
Sorin i have a x360 i think is the same model, just open it, and i can confirm the chipset is running as hot as yours, could that be a fault or just a factory design problem. Why didn't HP extended the heatsink over the chipset. HW monitor doesn't give me chipset temp but cpu, gpu is ok 45 and 60 also is fans are working not throttling. Im really confused how is that possible could the chipset run at so high temp? Is that ok ?
My Z790 chipset regularly runs at 67C on a ATX board.
I have had times when a solder joint is bad bt probing it sorts it out. Slightly denting a dry joint etc. I would guess the diode on the back had a dry joint.
Good job mate 👍
Hey mate, I am searching for a budget hot air gun. Do you have some advice ?
Greetz
Go for 8018LCD SMD REWORK STATION, its handy same like soldering iron. I am a beginner so it works for me. If you are professional i dont know the BEST.
I was looking for that video few months ago...... That's why I couldn't find it
Maybe the chip set is where the RTC is. Usually a low power thing...
Maybe you have opened/closed a fet by using your multimeter on beep mode to find 3,3v on the other side of the board?
On latest mobo,if 3.3v ldo is Short,be rest assured the PCH is gone 90% of the time unlike older generation where the sio is usually the culprit or the standby ic in some cases.
Unstable contact somewhere. Click, bend the laptop a little and see if it turns off.
Well you lost me Gunga din are you putting power into the motherboard with those multimeter leads. Because I can't see how you can measure the voltages without the power supply being plugged in. Maybe I fell asleep somewhere during the video. I do wish you were in Perth Western Australia my friend I'd bring my HP 840 G3 to you for repair no worries but alas you is in London I is in Perth, so I'm stuck with my new battery and a non charging motherboard but a laptop that works perfectly plugged in. So grandkid will have to wait for another school laptop Love the videos always good to watch an expert plying his trade, your just brilliant my friend just brilliant so bloody smart and knowledgeable, let's hope it's not the screen cable but a smart guy like you probably has hundreds lying around ye olde worke shoppe. Great to see you work my friend. No Im still lost my friend, how are you measuring the seventy milliamps with no power supply plugged in?? To me it seems impossible no power adapter no battery but then the HP 840 G3 stumped me to.As to it working without doing anything to it, well you did do something you undid a lot of leads and then reconnected them. Who knows how many people before you have fiddled with it and not put it back together properly, maybe it started out with one fault and ended up with another one. As to what to tell the customer, do like Apple workshops do, LIE, you replaced the CPU,you replaced the mother board. you replaced the closed circuit gurglatron. Apple have made an art form of lying to their customers. I know you won't your much too honest, that's another reason we like you.
Put a piece of heat spreading tape to touch the heatsink so it can draw some of the heat...
Good morning sir 😊
These HP models do suffer from random death. I believe in a lot of cases this is down to the housing not having much structure and allowing the board to flex when the laptop is lifted and shifted around causing all sorts of chaos from ram slots coming away from the board to CPU randomly overheating. All kinds of trouble and it is hard to repair something that is caused by the board flexing, no matter what you do you will have a problem later on.
I agree I bought a spectre x360 the model just before this years ago mine died in a very similar way. I decided that would be the last time from hp I buy for a long time.
@@final0after0image I can safely say I have serviced more HP laptops in my life than any other Brand and I used to work for an apple service centre so that's saying something
@@yodacoYou're right. Other day removing the battery from a shitty Hp laptop shorted something and the laptop died. From a hdd upgrade and ram costed me another 100 dollars another mainboard.
the rtc circuit connect to ldo3.3 v and and the voltage gose to the pch via a double diode
Good morning sir
What Screwdriver you use? Thank you!
Great video
Probably some nearly-microscopic speck of something conductive or a solder blob moved ever so slightly when you moved the board around, causing the short to disappear and restore functionality....just my guess...
It worked because u touched the both sides of the diode with 3.1v, possible to change the diode
Sorin you didn't check the supply current after you plugged in the 2 wires on the silver thingy in the r/h corner by the hinge. What does the thingy do?
Eric
It could have been a bad connection also. When you reseated the connectors it fixed itself.
Hi i have same Problem on Dell Inspiron 5379 where the chipset is builtin with processor under heatsink and is short to ground with beep sound and getting mad hot when charger plugged. Is the chipset dead?
Hi Sorin and greetings for the great video. I have a theory about your case. In the new laptops ldo have connection with the PCH. I think in the beginning PCH is shorted, but after you inject voltage the chip is warming up and then happens reflow effect and chip is solder back properly. I have a so many cases when I reflow chipset and laptop turning on. I think this is happen.
Probably, someone opened the laptop before and connect bad one of those flex cables. Then you were having that short reading until you disconnect all this cables.
please put and pin the links of two other relative videos on this series Sorin. thank you
I was puzzled I thought the LDO 3.3 volts PS went to the Super I O not the chipset.
i know its a year ago other night i was fixing my laptop MSI and was getting hot like that the cpu and gpu chips i was getting no flow through with the air on the heat pipes at the end there was a peice of foam blocking the exit of air i did wonder why putiing the heat zink back on was hard so i looked in the end of the laptop the complete end was blocked with this bit of rubber took it out was really wedged in there and then everything was cool i did go bit crazy with my heating the grapics cip and well the end of the computer case well got all wrinkly the cover goes on but well i did it was getting no video out like you did there but i dident use flux which is my next try to get video out even the external plug for the spare computer monitor did not work nothing out in vidio ok thanks ill try flux next dont know if you will see this
may be there was a metal dust under that cover.
that's one of these cases of magic repair. NB repaired by force of autority
I had that just yesterday, bought asus zenbook, seller said power on , has black screen but on external tv displaying. So I bought it come home pressed power button and display come on. So what was wrong? Ps: not flex cable. Maybe installed bad driver.
It's kind of a capacitor was partially short then ripped off when pushed to its limit
If you remembered same issue happened to you with a phone
(20:13) Guys, why isn't anyone helping me? well, I see you so focused (reflecting) that I dare not interrupt you... Or I even have a better answer: I'm already so confused that I don't understand what you're doing ... lol.
please sir,i would like to inquire from you,what causes inductor coils to heat up immedately after power on,most especially around cpu core section,but has good output voltage but inductor coils are heating up
Just catching up, Interesting video, that was a headwrecker alright, LOL
I think, may be a little insect goes over there inside the board and made a short circuit puting this diode or some switching power supply kind of stuck and once you put the current flowing in the right way, you unstuck that "stuck"...
Is just my theory.
Sorry if my English is not good enough, i'm from México.
Customer: "What was the problem?"
Me: "You opened the laptop!"
This happens to me every time someone comes to me with a broken pc and the moment i plug it in it starts. Some call it magic fingers 😂
yeah me too when i start to touch or just by my presence arrived then all is well and good for customer by bad for me since i dont have job and money to earn on haha
This also happens to me. I can't charge for it if it starts up and nothing's wrong. They call me a computer whisperer.
Electronics fear you, lol.
I thought the corner of the chipset was hot from the heat of the diode on the other side? So the diode burning up is killing the chipset? The diode was not shorting but took 310mA, 270mA, 240mA, 80mA then 70mA. Looked like tapping it with the probe temporarily fixed it but it looked to me like the diode needed replacing else the chipset will completely fry.
worst thing is, sometimes the moment you leave its stops working again and yeah shit^^
I'm no expert but I've seen videos where components puff out smoke and yet are repaired. Is it possible the diode was 'stuck'
static electricity?
Sure i remember the plumber video " this is how we fix TV we remove the black karma diode "
thanks
I suspect this unit was subject to overclock voltage. That would as an end user, pushing the limit as thermal capacity and where the only suspect was the powerdown as shown to the fan. At repair, this type of fault is shown as where cracked function to solder joint *is where I cite an example. (also example)... as one unit, a failed onboard graphic chip was a fail cause. Here, the onboard ram, also is within difficult frequency match. As I have replaced various sets, and individual units that just could not function as properly to demand of larger voltages in thru put.
The tech is left with the problem of a somewhat intermittent fault, with a known high heat drop out as certain to the example of fans, not present. *And what to do?
While I have the fun and freedom to charge nothing, the tech has a real hour as labor. But, a product that cannot be described to *full operation.
At my work bench, I would 1. Charge nothing and return the unit.
2. Charge a nominal fee and list suspect overclock fail, semi fault with likely near chip failure present.
3. Charge a nominal fee and explain a test period is required, as intermittent failure was real to voltage.
4. Charge nothing and define a real fire hazard to end user.
As to this post, I would be very curious as to where fans were present, and some full operation, with perhaps USB demand present (also). That is to say, try for a maximum gaming end use. By design or as curious to the individual board, I suspect the uneven heat at a chip is suspect.
As a tech, I fully understand some design as generation 1, gen 2, gen 3 can exist to a shared fault, as across a product run. (batch or model assignment).
My take away is to be fully warned of a product, simply highly suspect to a fault as built in, all model...in this brand. A fault not as attached to price or function,
But as (vendor, MODEL ABXZ) where known to be a lemon. All such as rubbish from factory. All built with the cheapest parts available.
As a business, there might be an avenue to sales as to supply a reliable unit for a modest cost. Because I would say the public understands a shoddy, crap model finding.
But a customer might try to hide overclock, where full knowledge was certain to full or partial failure at that excess voltage. So a charge as "repair" might likely see a
return....as faulty repair in days, or a week. *a built in hazard to all repair but very real to my view at this model.
My final remark..."I was a witness to a household, where a faulty stereo failed and caused interior fire, huge smoke damage.". Where high heat is known, I would
urge real caution and fully document that finding as certain to customer signature. A real report as information found to the unit. M.
Though the hp x360 has a gpu, its not for gaming. It's a professional or business laptop. It can play gaming but nothing demanding. I have the older version of the x360
I remember the plumber :)
Commenting for the algorythm
Sorin,
I have to take you to the judge. Can’t sleep after watching this video. I am fighting my wife and screaming to the dog. Can’t believe it’s working. Out off nothing. I am crazy now?? 🤓😵💫
was it the frosen bios? no 3.3v battery= main battery is, upluging every thing reset to defaut bios image, correpted image present in the chipset was cowing the heat generating is gonne, yes sorine tested it just after unpluging maybe the left over electric chqrge ilon a capasitor kept it alive.
one's it is reloaded all goes all right😅
Nice one
You killed the short by injecting current?.
i have a laptop that has the same problem! i cant get 3v...only 2.5v! i stopped working on it, cause its not worth the time and i guess the chipset is bad.
its taking .30 amps and the board gets warm after long peroid of time and i have no thermal camera!
its just a hobby of mine, so i let it be for a while and try again later!
This is called fuzzy logic
RTC 3V and LDO 3v is first voltages pch take
I think the PCH will soon speak it's last words....
Eddy currents were trapped between that diode and resistor and you spooked it by mesuring it. No other explanation 🤣
Diode opened after short.
maybe some dust was cleaned by opening the plastic cover ?
I have never tried fixing shorted Io chips pch etc by trying to blow open short but will try in the future. Is there any properly designed short killer that monitors current flow to intelligently stop supplying damaging current when short blows open?
Damaging current? Afaik the current will just drop to normal usage levels once the short burns out
@@DimitriPappas but if the voltage required to burn the short out is high then that voltage will be present across components that may not tolerate the high voltage and hence be damaged. Instead of the current going through the short it will now go through other components at possibly too high a voltage.
@@Swenser yes true. I haven't watched the full video but I assume voltage was 3.3v and current was high
@@DimitriPappas yes. For this video, Sorin got lucky if that's what happened as far as temporary partially shorted component. No need to go for high voltage here.
Question: The melting point of silicone is 1411 celsius. So if the core gets damaged due to v/amp overload does it mean the core was heated up to the temperature above 1400C? If not then what does it mean that the CPU is damaged? Is it the casing damage, that wraps the silicone core? If it's the casing then can it be fixed?
No semiconductor junction resist more than 200 - 250C ( maybe for short periods of time ), even if silicone itself melts ar 1400C. The chip does not contain pure silicon , it contains copper, substrate material, epoxy encapsulations, etc . Any of these materials breaks, the chip itself does not work anymore due to very tight distances.
@@modorangeorge4991 copper melts at over 1000C, that's why I started thinking if maybe there's a way of fixing CPUs (this would be a multi million idea)
Every chip has internal components, very tiny ones, transistors, resistances, etc, if any of those get shorted or open, it cannot be fixed, the chip is damaged beyond repair due to the microscopic components cannot be replaced one by one.
@@juarezcastelo You may be talking about casing/packaging that is attached to the silicon core (?). Maybe the packaging could be replaced. I know that the technology doesn't exist today but if the factory created it then there should be a way of recreating this process. Anyway, what I have in mind is the silicone core that is etched using photolithography, I can't understand how this one gets damaged since there are no parts different than silicone mixed with some other elements.
1 hour of diagnosing, then pressing your thumb the right place.
Bill him £10,040 = 1 hour labor + your specialist thumb knowledge.
perhaps could do with some Crocodiles (to keep Hands Free) ...
you fixed it by pulling off the black plastic lol.. either that or you may have a Kobold!
On so many singal on pch ldo 3v is pulled up
I believe the laptop will shutdown after few minutes from the start up, i had this fault before .
The problem was the diode.
battery uses 3.3V LDO and you have not plugged it back.
'Now we have some black thingy' 😅
Put thermal pad on chipset
There no such thing as nonsense it is only our incomprehension.
maybe because the chipset is normal running so hot and like a gpu chip desoldered himself because is getting too hot. maybe a reflow?
On a Hp Desktop PC 8th gen we have to sent It on warranty 4 times for board failure. Every time we see a crack on chipset...at the end we buy a Dell
So what will you do when Dell chipsets begin to crack like they've been doing for the last 8-9 years?
@@TheXlen trash it.
If I sell a PC and it cracks in 3 month multiple times my shop will lose money, after 3 yrs there's no other warranty
rtc section RTC
I caught this one quick lol
👍👍👍👍
its probably corrosion somewhere under the chipset, worth trying to reflow
Put a thermal pad on it an call it a day.
Exactly what i did :D
@@electronicsrepairschool if it was mine I would put them on ram chips too. You never know lol.
Can it be something like a capacitor inside the chipset?
I think I saw inside one of these chipsets behind shiny surface that there was capacitors too. Can this be a problem?
Interesting....He Really Hated this Laptop...😂....Heatsink the Chipset..
on my service.. when someone bring anything with HP on bucked and pavilion on name,., i just trow it from the door.. never.. same for epl garbage :)) every thing else is fine..
since when are you using a thermal camera, you cheating on the petrol ?
is called 'ménage à trois' :D
@@electronicsrepairschool haha orgy with petro and thermal cam
Radio muse is too bad for games, wired mouse is much better, among them the gaming mouse runs smoothly, I don’t know why.
Frozen bios
Frozen bios won't draw much amps sir . and it won't drop the voltage . you need to learn bit more about how electronics work
To mógł być włos cynowy. Spalił się pod wpływem większego prądu.
HPs, enough said. lol
Bad qwality again.
RTC