Hp 14-dy0505 not charging - the moment you start hating your job - a tricky fault
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- เผยแพร่เมื่อ 27 ส.ค. 2023
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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.
Bill according to the labour while you justify why...
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!
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)
Nice👍
Great guessing 🎉
Exactly. The perfect showcase of "6 hours of debugging can save you 5 minutes of reading documentation"
Exactly my thoughts.
Dude I think you nailed it.
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.
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
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
@@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.
What was the device that you used to check the batter?
@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.
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.
Greetings, thanks for all the inpirational knowledge
Please help me with the equivalent of the MOSFET MIP0222sy
it's elektronik... you have to be always energetic ... negative or positive? no need to hate this job ... just enjoy the quest😊
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.
When work is stressful, sorins videos are a nice escape.
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.
it did exactly the same with me after going in a circle with that chip
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.
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. 😅
Never heard of latch up before, thanks man! Also sounds like it'd be a possible explanation for this black magic fuckery :)
that head scratch at 12:20, we all been there.
Love the content. Love the coin phrase "This is a Very Nice laptop, I mean Very Nice laptop" on every laptop you work on.
Every video of Sorin is great
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
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 !
😂
I cant believe it, Sorin has replaced a capacitor!
Especially when it wasn't necessary at all 😂
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.
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.
Same for my tablet. Seems as a gate, that throw current only if all conditions are reunited.
Sorin is the best teacher hahahaha!!!! i like your videos and it makes you humble than the others.
Simply hard glued to your troubleshooting video...😊
- the moment you start hating your job - !!! DONT SAY THAT, YOURE A CHAMPION
48:28 damn sorin, you went overboard ;)
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 😅
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
thats why old centuries of people sunday where to be day off hahah
hey Sorin, i enjoyed it, thanks for this video
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 ❤
I love Sorin for his HONESTY 💪
What a great teaching video. The best teacher
Hello, friend, are you also engaged in maintenance?
@@masterliu1892 Repair yes I am electronic tech
👍👍 very instructive investigation 👍👍
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.
Great video, thanks 👍
Great video. Intresting fault. There has to be a reason for this. Thanks for sharing.
Good job mate 👍
I love you men your great patient .... You have many techniques repairs
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
This was a tricky job, but nothing is unsolvable for master Sorin!☺
Good job
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.
Keep it up!!! You are Great!!! :)
at least you got there sorin ...grea8 video
I think you been awaken some capacitor alive.
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????😂😂😂
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.
great video,,i have to admit when the board turned on while you were looking away i did start to laugh,, it's possessed!
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 !
thanks 😊
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!
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
You are not the only one for sure😅 a had that kind of magic several time in my past...
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.
My blood pressure goes up even from watching this 😄.
are you alright buddy
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!
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?
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.
hi me very like your viddeos, do you have compilation of the broken laptops in the time ?
i have problem like this last month. after 1 day, I jumper cmos battery to the vdd. and its work fine
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…
Master Yoda , you used the force without even noticing
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.
Another amazing video!
Quantum phenomena 😂😂😂
Semi conductors are mainly based on Quantum physics, isn’t it !
TERIMA KASIH
Seen people use a brass brush on a DMM probe in resistance mode, and simply brushing the MB to quickly find a net connection.
😂😂😂😂😂😂😂 you are not alone, it happened for me so many times
You sometimes can fix a relay with a little dc current, i wonder whether that 5v you injected did something similar?
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.
Hey Sorin, I was watching a video the other day from you and you were talking about how apples lack of repairability and how you won't touch a mac newer than 2020. Well, my question is (I'm sure I already know the answer) do you use an Android device or an iPhone?
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.
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 :)
I had similar problem with lenovo 14 330s, exactly the same signs, it was a burned mosfet close to battery, thermal camera helped.
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
I faced this type of problem yesterday
HHHHuuuuuaaaauuuuu, world is no longer the same!!! Sorin changing a capacitor !!!!!!!!!!!!!!!!! :)
I noticed a very thin thread situated along 17 - 24 pins. Maybe it was shortening some pins?
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🇫🇮
Sorin taught me everything about " no fix jobs"
Sorin, in your tools am not seeing your power supply...which one are you using?
Sorin... maybe the resistor divider was open... ? finally I can't belive ... is working....
Man, this is like a murder mystery 😸
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.
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
First time ever Sorin replaced a capacitor.
incredible
48:14 when soldering in capacitors you must make sure not to disturb anything else
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.
Sorin did you test the chip you took out???
I believe re-soldering the chip properly did the trick.
Could it be a floating signal or ground somewhere, and you accidently (purposely of course) touched it?
It's 9nly Maater Sorin.....who looks for Power button after FIXING....LOL.
Sir which type of DC Jack connector you are using with two pins
Can you send me the link or details
where is the oscilloscope Sorin? perfect opportunity use use lol
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.
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
I think you're looking at the wrong DataSheet ISL9538CH is different from ISL95338H?
Sir u r repair bord
Very cool mind
Hi what is the device for checking battery laptop via computer the white box
you shocked everything with power supply and it got alive :D also i would like to get to lvl to repair laptop motherboards under 1 hour :)
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👍👍👍👍👏👏👏👏👋👋👋👋👋
Do I see a solder bridge between pin 31 and 32 at 11:10? Seems to be reflection as I don't see it around 22:00... So I looked at all the datasheets because you desoldering ISL9538CH, soldering ISL9538H and looking at datasheet of ISL95338... ADP is optional in ISL9538CH
it looked like a bridge yes, maybe he rectified it or it just looked like one but there wasn't one
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
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!
"Nice Laptop...."....Sorin Goes Deep...in this One...it fixed itself...lol
That is real fear doggy repair. 😊😊
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.
The revenge of capacitor!
I am going to make you replace me without any reason.😂
The nothing repair, could be the divider you bridged with solder next to the battery where you soldered the wire.