Hp 14-dy0505 not charging - the moment you start hating your job - a tricky fault

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[@Andyyy982]

I completely understand how you must have felt. I repaired a german car that wouldn't start no matter what I did. The customer had had it at multiple different shops before coming to me. Eventually, in the process of checking if I had current at the primary relay for the fuel injection the car started. I had not fixed or replaced anything I had just gone through the various systems methodically checking to find the issue. I assumed it was a faulty idle control valve - which was common with that model, and replaced the idle control valve. I went for a coffee, came back and tried it again. It wouldn't start, to cut a very very long story short. I eventually found that the earth pin on the ecu connector had a cracked solder joint. In the process of checking relays and fuses I had moved the harness and obviously caused it to make contact again. It took several hours to find the fault and when I did. It was as simple as reflowing the solder inside and everything worked correctly. After almost a full day of work... How do you bill for that? Hahaha :D These are the jobs that make us question our sanity. Well done on getting it sorted, I always find your videos incredibly educational! Thanks Sorin.

[@nathenieldanta9731]

Bill according to the labour while you justify why...

[@antoniegill7994]

At 40:20 of video on the datasheet pin 18 description says if VDD is pulled below 2.7V the ISL95338 chip RESETS all the SMBUS register values to default. (The SMBUS enables PC to communicate with the low speed peripherals such as the BATTERY and battery subsystem and voltage sensors) I Suspect this happened when battery voltage went so low. Because you charged the battery to 11.1V and when you injected 5V into pin 18 of ISL95338 you must have enabled the SMBUS again (maybe corrected the register values) and caused ISL95338 to see the battery and trigger power supplies to start working again. Maybe next time check pin 18 voltage and inject 5V if you find a similar fault. (I am guessing here)

[@saduniwathsala]

Nice👍

[@medhatal-moudarres5881]

Great guessing 🎉

[@RickDkkrd]

Exactly. The perfect showcase of "6 hours of debugging can save you 5 minutes of reading documentation"

[@herculespilot]

Exactly my thoughts.

[@DIYDaveOK]

Dude I think you nailed it.

[@lizardking8388]

ATTENTION SORIN, this is absolutely going to blow your mind! I've been down this same rabbit hole with the ISL9538. You have been looking at the wrong datasheet the whole time. The chip is ISL9538, but the datasheet you're looking at is ISL95338, which is a completely different chip. Don't bother trying to find the ISL9538 because only the short version (without pinouts) is available. The ISL9238 (which is available) however has the same pinout as the ISL9538, so you can use that one. The pin number 13 is ASGATE (not ADPS) and it drives the gate of the P channel MOSFET that feeds power from the adapter. That's why you were measuring a voltage there; it's an output. It's supposed to be at ADP voltage when the MOSFET is shut off and it gets clamped 10V below ADP voltage to turn the MOSFET on. When you soldered that wire (temporarily), whatever it is you connected it to was being fed to the gate of the input MOSFET of the adapter and pin 13 driving crrcuit. My guess is you may have damaged the driving output pin 13 in the chip so it permanently grounds out the gate keeping the MOSFET on all the time. I can't believe it actually works after what you did; it shouldn't have. You have had a Mr. Magoo moment. I think one or more of the inputs to the chip is wrong and so the chip was preventing the MOSFET from turning on. Now that you likely blew out the driving circuit, that MOSFET is on all the time. I feel I don't have any closure on this repair. I wish you would do a follow up on this and confirm what I said because I believe this laptop is not fixed correctly. Anyone reading this please thumb it up so he will see it.

[@electronicsrepairschool]

Got it, but you probably skipped parts of the video. The issue was the 5v ldo, which was restored. No shorted mosfets are there as the power is correctly regulated. Possible i misunderstood the pin 13, that was not the problem there, but thank you for your feeedback

[@Trustsimo07]

pin 13 is optional on some board, like that HP, As you can see the pin is not connected. See here: eu.mouser.com/datasheet/2/698/REN_ISL9538C_SDS_20210819-2931943.pdf

[@lizardking8388]

@@electronicsrepairschool I watched every minute of the video; didn't skip a second. This video was very important to me because it was the only one where you were dealing with the ISL9538 (boost/buck converter), which as I explained I had a similar problem with that same chip. With all due respect, I'm not trying to show you up or anything, I deeply respect your work, watch your videos all the time and have learned a lot from them, even though I've been in the field for over 4 decades. However, the 5V LDO which is used internally by the chip to control the MOSFETs was loaded down by the wire that you connected and was restored after you removed that wire. Before you put that wire in the circuit, the 5V was there, but the MOSFET wasn't turning on because the chip wasn't driving it probably due to an input it didn't like (not sure which one). I'm sure you'll agree that the circuit started working seemingly without you actually doing anything to it; I believe it's because either the gate of that MOSFET is being driven low by a shorted pin 13 or the MOSFET is now shorted from drain to source, which will allow current to pass all the time. The chip will normally turn the main MOSFET off if some of the input signals are incorrect. I understand if you don't want to take the time opening the laptop again since you already spent a lot of time on it already, but I think there is something to learn if you did. Once again, I appreciate your work here on YT.

[@stephenfsands]

What was the device that you used to check the batter?

[@radio-ged4626]

@lizardking8388 It would be interesting to demonstrate if the battery charge circuit is operating correctly. My thoughts were different, it may now be fully working. When pin 18 had 5V pushed onto it the circuit started to operate. Maybe the IO chip didn't enable the buck chip due to some glitchy logic process and it was stuck in the wrong state. Injecting 5v there may have put it back to the right state. It could be looked at as some kind of logic loop that got stuck in the wrong state. You can see the current state changes with the laptop off so the battery charge circuit looks to be switching. I doubt the FETs are now shorted. But it would be good to see this fully confirmed.

[@joseph_donovan]

Your 'nothin' repair videos are the most entertaining and insightful Sorin. They also keep us on the edge of our seats waiting and wondering if you will conjure up a happy ending. Bravo!

[@007mrdarcy]

Sorin, I only started laughing when you did.... you have a very infectious laugh and I have done the exact same thing when frustration with something can either lead to rage and fury, but instead it turns to laughter. That's the real person inside. Good natured, slow to anger, patience. Theses are great qualities. It's what makes you very watchable.

[@doctorvictor1683]

Greetings, thanks for all the inpirational knowledge Please help me with the equivalent of the MOSFET MIP0222sy

[@platineshop]

it's elektronik... you have to be always energetic ... negative or positive? no need to hate this job ... just enjoy the quest😊

[@Fred-B]

Loved the video. To answer your question about how you can post a 90-minute video where you did nothing; please consider that 12 000 people (at the time of writing) gained some experience out of it. It is definitely a valuable lesson. Thank you for posting.

[@gyorgyszabolcs7313]

The most interesting part of this kind of jobs is when the customer will ask, "what was the problem ?"... It happened for me too , to have this kind of issue and I have to say " I really don't know , it fixed by himself ... " and we leaf half an hour . It's annoying , but is funny too . All my respects Sorin , and thank you for everything !

[@saduniwathsala]

😂

[@diannewiggil8300]

You're not the only one to struggle with HP and Intersil chips. The number of times I've replaced a "faulty" chip with a new one and had the same issue, and then put the "faulty" chip back and it's suddenly resolved itself... I now removed them, clean all the solder off the chip, reapply leaded solder and then resolder them back as my first step. Seems to work most times.

[@Customer22374]

it did exactly the same with me after going in a circle with that chip

[@CXensation]

Have a look on the datasheet for 9538CH pin 18 - 5V output If the voltage for some reason is taken down below 2.7V, the chip is reset. I suspect some kind of a latch-up situation has happened, which you have reset by applying external 5V to pin 18.

[@Tribes11]

That's exactly what I thought happened too. In the datasheet it says that it goes into reset mode below 2.7v and the chip was clearly at this point. When the injected the 5V voltage the chip must have "unlocked" from this stage and it began working again. At least now we know that we should check the datasheet and the vdd pin if needed before trying to replace it, no harms done if we inject the exact voltage it was supposed to have there. 😅

[@fabian11235]

Never heard of latch up before, thanks man! Also sounds like it'd be a possible explanation for this black magic fuckery :)

[@christopherjackson2157]

When work is stressful, sorins videos are a nice escape.

[@agutek]

that head scratch at 12:20, we all been there.

[@brandonwoodford579]

Love the content. Love the coin phrase "This is a Very Nice laptop, I mean Very Nice laptop" on every laptop you work on.

[@masterliu1892]

Every video of Sorin is great

[@sipansibabdreddknot5179]

funny how many years of watching sorin and fixing customers laptop on my town i tend to act like sorin a very nice laptop subconsciously ahaha

[@Enjoymentboy]

This was very interesting. Great troubleshooting. I worked on a tablet for my daughter a few years back that worked fine when connected to the charger but wouldn't take a charge I assumed the battery was faulty but it tested out fine and each cell was around 90% charge and within 0.2V of each other. No output voltage from the bms tho. I was able to fix it by desoldering the positive tabs of the cells from the bms to reset it. No output voltage still when i resoldered the battery tabs but as soon as i connected the charger the bms reinitialized and began charging again. Both cells balanced perfectly and the tablet worked great again. Never had another issue after that.

[@patriciaoudart1508]

Same for my tablet. Seems as a gate, that throw current only if all conditions are reunited.

[@MoussaHanjoul]

I love those long videos sorin pls keep them coming❤, i just fixed a laptop yesterday after around 2 hours of checking and finding absolutly nothing wrong by brushing alcohol on the i/o chip 😅

[@ryanzadeh1478]

I am fixing Yamaha Receiver V3900 about 1.5 months every few days still is on my shed but not finished u don’t believe how I made my first hot Air soldering tonight 😂 I enjoy your video 1.5 huors to fix for loptop is nothing, I should work with you , we just got old and slow don’t worry about ❤😂🎉

[@VaderPaw]

I cant believe it, Sorin has replaced a capacitor!

[@Hejazi1365]

Especially when it wasn't necessary at all 😂

[@paulojarasantibanez6391]

Really love this kind of videos from you, where you pusch and force the brain to digging for resurces like a direct wire or something else.. my new mantra is "must work, because it must to work!"... this kind of video always helps me to think even more wider than yesterday. so thks Sorin for all this valuable time.

[@melchortungol4019]

Sorin is the best teacher hahahaha!!!! i like your videos and it makes you humble than the others.

[@Bogdan.Benett]

That is why I avoid working on Sundays, all sort of craziness happens when I work on Sunday. I keep Sunday for coffee and fun

[@sipansibabdreddknot5179]

thats why old centuries of people sunday where to be day off hahah

[@enriquetomas7180]

- the moment you start hating your job - !!! DONT SAY THAT, YOURE A CHAMPION

[@theroguetomato5362]

I've learned from your videos, because my first thought was that the battery is locked. Looks like I was wrong. But I'm learning, thanks to you.

[@Fourty_7]

Everyday , i have to watch one of the videos of Sorin before i go to bed 😂 thanks for sharing all of this knowledge and Inspiration Sorin ❤

[@ravindraadapa2952]

It is good to learn to diagnose your experience theory and action the way you test the voltage s and finally the internal short is hidden and played a role

[@adhikanshenterprises9580]

Simply hard glued to your troubleshooting video...😊

[@fendularatsq2317]

48:28 damn sorin, you went overboard ;)

[@PeakRepair]

Hello Sorin, Regarding this model: They often come in with a no responsive touchpad, you can replace touchpad, touchpad cable even motherboard will not fix the issue. The fix is: Reflow the touchpad connector on the motherboard and it will 100% work again, I posted a video how to do it as well but you have the knowledge already so you will not need it. Just a heads up if you ever get these models with touchpad issues…

[@mansirrabiu7412]

I love Sorin for his HONESTY 💪

[@Kalma-cn]

i have problem like this last month. after 1 day, I jumper cmos battery to the vdd. and its work fine

[@herculespilot]

Sorin two thoughts 💭 First it's a very interesting video because we can follow you try and error more than usually. I read on the data sheet that the 5V makes a reset below 5 volts. Maybe your did a kind of reset when you connected you supply manually to that pin.

[@Pirelli.]

This was a tricky job, but nothing is unsolvable for master Sorin!☺

[@mr.q3216]

Great video. Intresting fault. There has to be a reason for this. Thanks for sharing.

[@romuloybanezbabaii9376]

I love you men your great patient .... You have many techniques repairs

[@computersrepaircotesaint-l7407]

What a great teaching video. The best teacher

[@masterliu1892]

Hello, friend, are you also engaged in maintenance?

[@computersrepaircotesaint-l7407]

@@masterliu1892 Repair yes I am electronic tech

[@Swenser]

I think it just took 1 hour for bios to reset. I recommend a tool to trace one point to another on boards. Its like a conductive brush as one probe to make it easy to find where the join is across the board.

[@julianpasco2185]

@@Swenser link please for this tool?

[@SerwisKomputerowy]

You are not the only one for sure😅 a had that kind of magic several time in my past...

[@eeledahc]

I've had that happen a couple of times. It will bother you because you just accidentally bump into a fix. In fact it was the same type of issue. A whisker or something in a cap. Wasn't shorted and feeding Voltage with a little buck converter made it work.

[@mryanzou]

Ahhhh Sorin, don't worry about the 1 hour video :) i'm watching you like i'm watching an old Columbo Episode ! I try to find the kill... FAULT before you and i wait for the final reveal while i'm eating my peanuts and drinking my Dr.Pepper ^^ You just remember me 2 jobs i had recently with an HP and an ACER.. no power.. not charging.. poking around to check the main power rail.. and then ! POOF ! Magic, light comes up and fan spin xD Sometime it's just magic !

[@randyr.parker2698]

I wouldn't say you found nothing, apparently there had to be something wrong with that capacitor. I chuckled when you put 5V to that pin and the board would start to draw some amps, but then you would take it off. You did that twice, but I don't think you were looking at you meter when the amps would start to come up. Glad you found the problem, most would have given up by then. Have a good day Sorin.

[@NANO-SERWIS.MAREK-DASZKE]

The ADPS signal comes from the voltage divider, there was something wrong there. Sorin checked it and said it was ok. And as the name says the voltage divider there can not be 18.5v or 19v if the voltage supplying the divider is the same. Regards.

[@samchanmakara7793]

I think you been awaken some capacitor alive.

[@TeemarkConvair]

great video,,i have to admit when the board turned on while you were looking away i did start to laugh,, it's possessed!

[@nedbeard]

I recall a similar problem with the Sony VAIO SV series laptops (MBX-269 motherboard) that would go into a sort of RTC protection mode and refuse to charge or run from the battery. After replacing many unnessesary parts I found the fix was simply jumping PG13 near the battery slots!

[@andytipping70]

oh my god! -I need to go for a lie down - I just watched Sorin fit a NEW CAPACITOR??????? am i on the wrng channel????😂😂😂

[@emvdl]

Great video, thanks 👍

[@tomtom3533]

What is all that AgePee you are talking about? :) Didn't spend 1 hour on nothing as we all did get some experience about such a fault and could enjoy the time watching you!

[@patriciaoudart1508]

Thank's Sorin🙏🧡💚 🙋'perhaps' the current to the divider acted as a reset of the chip, by a gate, lower current stop the mb by security?

[@professoringles985]

i used to have a HP that would only turn on after heating up with a hairdryer, and it was somewhere close to where you were working on, my bet was on this, heat may have resolder some cold track or, you applying volts to the chip might have triggered internally like a mosfet gate.

[@lucataszarek8782]

Hello🤝, I also had such a strange case once, only that with a sony laptop charger I could not understand why it did not work, all components were fine and there were no short circuits, but something touched me to give 19 volts at the output of the power supply and after this procedure the charger started working normally greetings from Poland👍👍👍👍👏👏👏👏👋👋👋👋👋

[@user-bd2zo4gt2u]

hey Sorin, i enjoyed it, thanks for this video

[@aksuli1]

My blood pressure goes up even from watching this 😄.

[@masterliu1892]

are you alright buddy

[@rfr653]

Good job mate 👍

[@SidneyCritic]

Seen people use a brass brush on a DMM probe in resistance mode, and simply brushing the MB to quickly find a net connection.

[@jankro1]

The similar happen to me several times and since there is no reason for that, never know it will function 5 minutes or 5 yrs. I know the feeling🇫🇮

[@maz.reparateur]

👍👍 very instructive investigation 👍👍

[@MindYourBusiness1970]

Master Yoda , you used the force without even noticing

[@tallafah_min]

Good job

[@zsolt64555]

Keep it up!!! You are Great!!! :)

[@lucymc0191]

at least you got there sorin ...grea8 video

[@pacifist2829]

In many other occupations you enjoy of doing nothing and you still get paid of it. So you shouldn't feel bad about that, but I understand frustration.

[@alirezanzdy]

I had similar problem with lenovo 14 330s, exactly the same signs, it was a burned mosfet close to battery, thermal camera helped.

[@Hejazi1365]

آخه داستان اینجوریه که وقتی ۵ ولت تزریق کرد جریانی کشیده نشد. خازن که اصلا تعویض نداشت به نظرم باید پشت مقاومت رو با بوق چک میکرد ببینه این ۵ ولت به کجا می‌خوره؟ احتمالا به یکی از کویل ها راه می داشته

[@koreanblacksmith]

This is cold lead. It is likely a component near the charging ic or a cold lead on the side where the wiring was done.

[@clivenmatruska2812]

hi! i Thought you just injected a 5v on gate of the chip that make the gate function well it is like draining the system board to make it go to normal state.

[@adeltorjmen7508]

Another amazing video! Quantum phenomena 😂😂😂 Semi conductors are mainly based on Quantum physics, isn’t it !

[@markhenry2935]

thanks 😊

[@kiwichess]

I believe re-soldering the chip properly did the trick.

[@dh4rms]

48:14 when soldering in capacitors you must make sure not to disturb anything else

[@paulmendes9315]

First time ever Sorin replaced a capacitor.

[@masterliu1892]

incredible

[@valyoivanov3218]

hi me very like your viddeos, do you have compilation of the broken laptops in the time ?

[@jalalyn]

😂😂😂😂😂😂😂 you are not alone, it happened for me so many times

[@mardina1a]

You did something but you don’t know what you did.may trigged a scr or nand gate then it worked who knows but at the end worked fine good job thanks

[@joseluisgonzalez2422]

Sorin... maybe the resistor divider was open... ? finally I can't belive ... is working....

[@pepitocoronejo8495]

It is one of those eureka moments when the gods get you out of your misery and solve your problem without telling you the solution!

[@andrewverran3498]

You sometimes can fix a relay with a little dc current, i wonder whether that 5v you injected did something similar?

[@mrdutch167]

Sorin, I know a lot of people who are doing nothing the whole day, every day again and they call them boss. Actually you are the Boss of all Bosses LOL

[@ciprianpeica85]

where is the oscilloscope Sorin? perfect opportunity use use lol

[@Gmarkx]

Sorin taught me everything about " no fix jobs"

[@dmisi1]

Sorin am avut un caz asemanator , explicatia mea a fost ca parca pot ramane in unele cazuri semiconductorii "blocati" cumva . si cu alimentare corecta plus un consum la iesire adecvat i-si revin ,.... poate gresescc dar asa s-a rezolvat problema si nu a revenit clientul nici de atunci. mentionez ca era un calculator tip lapltop pus deoparte mai mult de un an fiind nefunctional.

[@zenos9302]

i like this video a lot :D was very fun to watch and hear the braincells crack. You are a great in what you do :)

[@radminas2739]

I noticed a very thin thread situated along 17 - 24 pins. Maybe it was shortening some pins?

[@NoYPi-xr3lx]

I think you're looking at the wrong DataSheet ISL9538CH is different from ISL95338H?

[@shirshendudasgupta611]

I faced this type of problem yesterday

[@lowiqsavage]

Man, this is like a murder mystery 😸

[@Trustsimo07]

thank you. Sir, I think you are looking at the wrong IC datasheet. ISL95338C and ISL9538C are not the same.

[@charanebot6423]

I noticed that too.

[@adrianocarmo1883]

HHHHuuuuuaaaauuuuu, world is no longer the same!!! Sorin changing a capacitor !!!!!!!!!!!!!!!!! :)

[@akhtarmohammad6205]

The revenge of capacitor! I am going to make you replace me without any reason.😂

[@iamthenotbenamed365]

perhaps board was in INTER-MITTANT-STATE which 5V input Changed to 'Exprected', after which ...

[@icommandoi145]

The nothing repair, could be the divider you bridged with solder next to the battery where you soldered the wire.

[@cytechelectronics]

Just received 5 of isl9238 chips and I hope I can fix an asus laptop today.Only works on battery and not charging and after all the diagnosis I have done ended up with buying the isl chip.

[@lawrencenjue2731]

Most times when watching yiur videos and i want to know if its. An easy or hard fix, i check the time of the video...if its an hour long i tell myself this is a really hard one😊

[@ctecrwp]

It's 9nly Maater Sorin.....who looks for Power button after FIXING....LOL.

[@sumuduasiri]

At the very beginning you didn't press the power button 😢and you pressed wrong button. I think issue was in the battery unit and original charging ic was good.

[@platineshop]

it's elektronik... you have to be always energetic ... negative or positive? no need to hate this job ... just enjoy the quest😮

[@paulmendes9315]

This is the problem with manufacturers not including clear instructions on the data sheet on what needs to be present for a chip to have its output.

[@dmisi1]

we must put some money together for Sorin to buy a Rontgen machine for lost traces ,....

[@SigmaWorksSW3D]

for me it looks like some times there is need for manual enable signal and then it sees that this chip is enabled from vdd... i have seen this few times in your videos now... you give voltage and things gets enabled

[@Trend_For_You]

Sorin, in your tools am not seeing your power supply...which one are you using?

[@laptopDoctorKZN]

I have a dell like this. Acdet current senor. Lower voltage on DC 16v.. battery charges.

[@laptopDoctorKZN]

I fixed my one. Was a bad resitor

[@f1remandg]

I think you should change the world as you unlike politicians kept looking for the problems and then tried solutions that you could see didn’t work! Then changed your approach. I would say that it all started to work after you had removed the long wire that you soldered a link from chip to divider, perhaps divider was a poor or dry solder joint that with that little bit of heat and fresh solder, reconnected the track.

[@westmallelover]

Hi Sorin , it happend sometine , i have worked many hours ( i don t have your knowlegde ) , on a laptop , don t understand where was the fault , test so much value , and i gave up , reassembly the laptop to give it back to my friend , i don t kwow why but after reassembly , i justed press the power button one last timpe and the laptop start

[@piccoloijo]

Today i got the same. The All in one PC didn't turning on and consume 170 mA current with LDO chip mad hot. Open the board, make a little measurement and suddenly the PC coming on 😅 Lucky me its only takes 3 minutes rather than an hour and half like you 🤣