Lenovo Yoga 910 - not a easy fault to be diagnosed

[@AnonymousRepair]

The two diodes supply the chip with power one diode pd5 is from usb c port and diode pd8 from battery, the mosfet configuration is buck boost( low voltage to higher voltage, high voltage to lower voltage )

[@williamrollinger3637]

I was having a Crappy day, when you said" I found it... the Bastard'.. I just started laughing my arse off! That really made me feel as good as you probably felt at finding it. Love ya, Keep up the great work!

[@Dinejahani]

Sorin, to check the circuit for other side of the board, you can use the "light test". Put a flash light under the board, and look at the traces. You'll see it exactly where it going and coming.

[@sajithsadakalum471]

I think it's not working for double side pcb..

[@EurekaRecycler]

thank you for another "no non sense" no distracting music and easy to understand tech video! Thats great!

[@paulojarasantibanez6391]

¡Gracias!

[@Infiniti25]

This video shows why it's nice to make a multimeter probe with a crocodile clip and some frayed solder wick or audio multi-strand wire so you can brush over large areas to quickly narrow down where the beep comes.

[@David-not-sure-about-this]

Hi Sorin, is there a follow up video for this problem with the Lenovo Yoga 910 power issues? You were looking to put a new chip in and show us etc. Many thanks for the great videos.

[@mateohidalgo3787]

OMG You help me so much. Thank you, now i revive my old yoga.

[@JustMe-in5jn]

Found the little bastard! Love the channel and Sorin!

[@pammyt1009]

My Yoga 910 has the same issue. I have some info for my repairman! Thank You Sorin!!

[@worroSfOretsevraH]

What I use for a fast way of finding a missing connection, is a cable braid. Like for example from a coaxial cable shielding, or a solder wick. You make a brush, attach it to one probe, and swipe across the board. Btw. you meant to say a two diode logical OR connection.

[@Lance_MadCat]

Thank you dearly for the knowledge and experience you are passing on!

[@sunilkhadka5767]

Kindly post the rest of videos of this laptop lenovo , the part replacement with working conditions ... test result

[@SureCanDoComputersServices1]

Welcome to my world with the Lenovo's. Have fun.

[@devichetan]

That PD5 diode is ADIN_1 & PD8 diode is VIN Right fault Diagnosed

[@aliassaila8037]

Hi Mr Sorin, Keep the good work up👍

[@JazzEnso]

If the laptop is working on battery mode only, and not on adaptor the common issue is the charging IC or the upper or lower mosfet, so better to use schematic diagram, and focus on the charging circuit only, by the way sorin is legendary technician he is fixing without schematic 🥰

[@pokontroli]

This board does not have schematic or BV. You have to use oldskool method.

[@xxycom8963]

@@pokontroli I found the schematic in one minute.

[@eronguitarcovers546]

@@xxycom8963 hey, how did you find the schematic? Can you please share how?

[@GregM]

ISL chips are well known to cause power problems with MacBooks and are suspected and replaced frequently.

[@nordinemadani930]

2x diode = CH520N4-45GP_DFN1006-2-2

[@lesliebooth2457]

Nice to see the master at work

[@twitch54304]

I have the exact same laptop with the same problem and I did everything your doing so far. It took me a while to figure out the battery tells the charger to switch to 20v. I opened the battery and found 2 cells at .66v and 2 at 4.2v. Someone plugged in a Chromebook charger and shorted half of the battery. New battery and it was good to go after programming to the laptop.

[@neelbanerjee3086]

very important video lessons. thank you sorin

[@knightwar3]

I enjoy watching these long videos and very nice work as usual looking for another upload about this laptop when you get the replacement chip and the diodes

[@XXXXIndices]

My Lenovo 910 had the same fault twice, one time unplugging the battery and reconnecting it and started working. Another time the ribbon cable was not clamping properly and would only work with pressure on it, I repositioned the foam block on the connector and replaced the rear cover to hold the pressure on it.

[@alexander19681]

Nice to see a pro., on the work...

[@johnsmith-tr3dh]

Ive been watching theses for months and this is the first time Ive heard Sorin curse, LOL

[@esbenarndt5703]

Schematic is gold!

[@8500gtNvidia]

As always, fantastic lesson master Sorin...thx

[@dodzdagondon3231]

You're a great Instructor, Sir.

[@ziadfawzi]

Thank you

[@anwaraddasi8892]

Hi Sorin Good logic diagnostic which makes us understanding electronics. Thank you so much for the information.

[@davidbradford8542]

The circuit diagram is easily available online it took less then 2 mins to find and download it.

[@dvdr866]

have u still got a link?

[@ODRACLIVE]

Thank you master Sorin!!!

[@1docg]

Is there a follow-up to this video showing complete success after replacing said parts?

[@MartinRepairs]

Why not put all the ordered chip names in a excel? Searching for the chip would be alot faster... Isnt there a hole in a mosfet? PQ10? 56:55

[@VincentTubed]

did you get the chip yet ? hoping to see the rest. thanks a lot for the explanation, always great!

[@hamzarr2122]

Wow sorin nice video❤️

[@olimpiupuscas2771]

yeah ... I had the same diode and the same chip burned, I've replaced them , but still have something else taking power...

[@LMCMaio]

Great lesson.

[@seoness]

Maestro thanks, could you give one video about how to use diode mode and resistance to detect short circuits on a simple practical Example thank you.I know you already give some but pls if you can on example what can we check with resistene and what and when to use diode mode .

[@ssewg3485]

you are the best!

[@FreemonSandlewould]

Where is the follow up video? I could not find it ! Is this laptop still in pieces in his work lab?!

[@melplishka5978]

Well done sorin.

[@ashrafelzaher8764]

Hello, my the microphone in my model is not working also the laptop doesnt go to sleep when closing the lid. When I put it to sleep manually close the lid then open it, the laptop doesn't wakeup until l press something on the keyboard. What do you propose me to do? Everything in the Microphone and lid settings is fine. It should work but it isn't. Please help

[@ReparadorAficionado]

You can judge the difficultyness of the case given the amount of nicotine that Sorin is requesting to the little electronic cigarrette.

[@breeze1536]

Having the same problem Sorin. Any updates about this issue ?

[@billmelittas5711]

Hi Sorin...Your vids r so educational. Will you repair a motor controller for an e scooter? Im banging my head for 2 weeks! Keep the vids coming and thanks!!

[@MrRvdbeek]

Who that’s a nice find! I was thinking it’s a broken flat cable connector but then you see a blowup diode and that’s the catch. How do you replace the diode can you buy them or do you replace is with a spare one?

[@jandostal7343]

At 23:50 in background man putting item inside his jacket he took from the shelf. Shoplifting???

[@myphotos]

I have a Microsoft studio I've purchased as a project. It is liquid damaged and seems to be dead. Could I send to you to make youtube video to see if you can save it?

[@JunPVlog]

Watching here sir sending full support

[@intrax2tv]

Maybe explain some more while you are looking through microscope ? So we can know what you are doing... Thanks ! Usb-c 5 volt on the charger ? Charging ic not asking charger for 19 so what do you think ? Actually easy to diagnose...

[@chrisjconlon]

Hello. Watched you video and it was such a great help. I identified the same exact issue on my same laptop. IC 9237HRZ had a hole in it and diodes pd5 and pd8 are disintegrated and displaced. Have you found out anything about these diodes, type and what part they are? I was able to locate IC on mouser but cannot find info on the diodes. Thank you very much for your work sir!!!

[@rifatahmed4659]

That was hell of a show.. it is the main charging ic like MacBooks they use ISL chips… but how the laptop turned on with a shorted main charging ic ?

[@intrax2tv]

If battery has sufficient voltage no charging ic is needed !

[@rifatahmed4659]

@@intrax2tv there is a short circuit though! Is'nt the super io suppose to check if there is any short circuit before starting the boot sequence?

[@rifatahmed4659]

@glyn hodges yeah that explains 👍👍

[@Lifeless11111]

Could be a couple of flyback diodes for the buck converter ... its normal diodes in that case

[@oxigen1016]

Hello Sorin, first of all, thanks for the video. I experienced the same issue today... (I'm in the learning phase, and I bought a laptop exactly like this one with a possible display defect, as it worked via HDMI). I didn't have a dedicated charger... so initially, I used 5V 1.5A via USB, and it started to power on. I gradually increased it to around 19-20V, then increased the amperage to 2.2A... it started to charge. I left it for a while, then I unplugged it... after which I plugged it back in without lowering it to 5V... short circuit... spark... and pretty much done with charging. :))) Now, my question is, did the chip ultimately solve the problem?

[@GROGGALORE]

Wouldn’t you want to replace the resistor in serial mode as well? From here it seems somewhat dodgy and also has a hole!

[@polburoyagustin6616]

Hello Sir, Good day just want to ask that did you able replace the ic isl 9237hrz? did you fix the lenovo yoga 910, because I got the same problem. I bought a new power board but i got the same issue.

[@armunro]

New Lenovo laptops use usb c charger which has variable voltage up to 20v. This seems to be a bad design; they have gone mad creating complex charging for laptops when ~ 20v is fine! You can use 2 usb connectors for charging and you would think they would put one either side of the laptop which is a great for convenience but they dont!

[@patriciaoudart1508]

Very interesting fine!

[@cjmendoza8599]

Hi Sir Sorin have a nice day.I just want to ask help from you, coz I have a repair of laptop HP Pavilion g6-1a69us.There's a power light,but when i press the start Button power is cycling loop Then when I disassembled the laptop there's no BIOS on board. I thought the technician who previously repaired the laptop removed that. Now I do not have a donor board to compare what's the number of the bios.So I'm asking for your help if you know what is the bios number for HP Pavilion g6-1a69us.I googled it already but there's no exact Schematic diagram.Thanks in Advance.

[@ortizpassos]

Hi, I found schematic, but I need Lenovo Yoga 910-13IKB - CYG50 NM-A901 Boardview. Do you have this?

[@pendehos8845]

Have you ever worked on a laptop with MXM port and Desktop CPU socket, like the industrial big laptops with removable RTX and Desktop CPU chips?

[@candabi]

Why so often do you measure voltage with inverted polarity? Is there any reason or is it is only casual?

[@widyahong]

every i saw parade chip is always about hdmi/mhl and now displayport.. yeah its only about external display.. and about wowstick electric screw driver, please dont use manual if the motor cant turn the screw.. it will break the gear inside.. with PJ you can disconnect or connect powerrail without damagging the soldermask..

[@shahfx1235]

Great work. Would using a thermal cam help you to find this issue faster?

[@gianseven]

Look at 1:04:21, when he injects voltage and the chips starts becoming hot. In this case there was not a 0 ohm short, when he injected voltage it started becoming hot but there was some resistance and it was only taking 500mA, which is too much for the chip itself but it's probably not enough to be detected by a thermal camera if you don't already know where to look for

[@Infiniti25]

@@gianseven He injected 2.68v at 540mA...that should be over 1Watt of power, it certainly would be a visible difference on a thermal camera

[@shahfx1235]

@@gianseven Thanks for the reply. Injecting voltage earlier on at the capacitor Sorin attached a wire to, may have revealed the same issue much earlier on. If the heat can make the alcohol dance like that, its releasing more than enough heat to be detected on a decent thermal camera.

[@mariodistefano2973]

Sorin, I think you should re-adjust the microphone thingy, so we can ear also the beeping... now we can't ear te background noise, but nothing else apart from your voice.

[@almerodupreez]

Where can I get that electric screwdriver?

[@Shadow_Demon_X]

How does a component disintegrate like that? As soon as you touched it it turned to dust 🤣 I suppose a better question would be, how do any of these components fail? Is it just a sudden surge or something else?

[@mahmoodsahab7321]

very good

[@wass77]

hello sorin good to see you, i have a question, what is the usual temperature when you use hot air?

[@gile849]

360-370c

[@wass77]

@@gile849 thankyou! 🙏

[@giorgostexnikos6976]

amazing video

[@thomasunsworth425]

Hi .... I just watched your solar set of vids from about a yewar ago. Very interesting and informative. Any chance of an update as to how the system is workin please ? At the start of the series, you went on about how a buck converter can use enery with a voltage of around 4 volts but in you final system, you didnt use one . Why not ? I thought you plan was to grab as musch power for as lon as possible from your set up. Can you let me know if you plan to add a buck converter to the ststem ? Kind regards ... T

[@michelk1445]

Why not use an thermal camera to find the overheated part?

[@TecHService]

Skills are important then thermal camera. Old school.

[@geonylove]

Am ametit pe circuitul asta 😎

[@DAVIDDAVID-85]

I have a problem with my Samsung 8s phone, strange malfunction

[@stevedebeukelaer1424]

Nice fault finding

[@robinsonsoto8471]

Usb-c chip ( controller) on both motherboard may be faulty. I know you are a good tech.

[@manojkumar0191993]

OLD IS GOLD 🪙🪙 🥇🥇

[@mufidayya.5904]

Can anyone here provide Mr. Sorin's shop address in London . Thanks.

[@mohamedchafiq4191]

Mr Sorin or The best Quality/Price. please let me don't say more

[@mira5751]

I think thats an output USB the charging port is the other one.I have not seen all your video so I can be mistaken

[@youssefmh]

What can cause unstable voltage in a tv motherboard ? The tv turns on but i have an horizontal line and a voltage in a coil moves between 9V - 8-V Can some help?

[@Knebebelmeyer]

what kind of tv? which one exactly?

[@youssefmh]

@@Knebebelmeyer iris model 43e2

[@Knebebelmeyer]

@@youssefmh sry but i cant anwer u censorship vanish the whole comment

[@raymondgalland8074]

Sorin my buddy has a camera that has Precious photos that He needs to Recover can I have your shop contact info for Him to talk to You Please?

[@ΣπυροςΓιαννας]

To the question what would I do in this case, my answer is I would watch what Sorin did 🤣

[@rosch448]

that's the problem with usb-c trying to be everything

[@redwinedrummer]

Thank you for the lesson, Sorin. This case has great resemblance to the common USB-C charging faults among Macbooks. Louis Rossmann has a recent example of a USB-C controller failing to negotiate the proper 20V charger voltage ( kzbin.info/www/bejne/o6S7nmOne9CWm5I ). In Macbooks, this is done by a CD3215 in most cases. The fault in Rossmann's case also only pulled 5V. Replacing the USB-C charging IC fixed the problem. Looks like this Lenovo unit followed the Macbook design.

[@intrax2tv]

Yep making things more complicated so prone to faults and not charging as all charging is now shifted to usb-c ! 😈

[@gianseven]

NorthridgeFix has some videos of fixing HP laptops with USB-C charging management ICs too. I don't understand the good of usb-c for charging a laptop, only added failure points as far as I can see Edit: this one I think m.kzbin.info/www/bejne/hmGafGuMnJmofNU

[@markuslohse1453]

@@gianseven It does have advantages, like I no longer need to carry a power supply around: At home I plug in an external monitor and the monitor also takes care of supplying the laptop with power and at work the docking station does the same job :)

[@CarloTheImmortal]

funny I was hoping you had a video on this model, well I have a similar one it's a910-13ikb but its limited edition apaprently has the # on the palm rest, kinda cool but seems to have just died, seems like there's a lot of these motherboards on ebay that are just broken. Lenovo seems to have been going down the shithole for years. A lot of people seem to have trouble with these 910 Yoga models. definitely weary of ever getting a Lenovo ever again.

[@weerobot]

Interesting One..

[@reggyforest5299]

just reset it by putting a pin in that little small hole for 10 second , mine had the same issues after an update i did

[@zubairahmed1368]

I been watching all your video and I have left several message I like to have your shop address I have computer if anyone know any idea how to get please I would appreciate anything anyone can

[@Ryan53799]

Get a thermal cam and inject voltage and see what gets hot

[@hakanturkoglu9344]

Yoga 390 have same problem

[@TTT-V]

👏

[@danielbayugar4856]

Mr Capacitor!!

[@ch2o2]

"...when everything is good and if you even have spare-parts it is still not working ...this is an insaaaane job" ...haha, welcome in the club of eternal insanity and daily frustration

[@oohardivy7571]

where is your repair shop? I spill water on my new pavilion and now it is dead. Very interesting videos but too much for my simple brain.

[@g8sbs944]

Hi Sorin you could have saved a lot of time if you only followed the normal practice ALL WAYS do a full BOARD INSPECTION FIRST

[@theflowbox]

Ohhh yes? you are so smart but wait a moment, where are your video? i see nothing in your channel

[@g8sbs944]

@@theflowbox i don't need to post anything

[@theflowbox]

@@g8sbs944 hahaha I see you are anonimous and too smart, everyone can guess from the use of capital letters in your post

[@gianseven]

@@theflowbox Repair shops are everywhere, not only from people on KZbin. What he said it's true, if he had done an inspection under the microscope he could have saved some time, (but he probably would have found it later as he first checked one side trying to understand the circuit) many times something this tiny can be overlooked and when you understand what the circuit does you start to look closer for broken stuff around that suspicious IC, but you always could have noticed that before reverse engineering by just looking at it for 10 minutes. Happens all the time with lifted pads/broken traces in vintage hifi equipment. Look at the schematic, try to test a transitor that could case problems if broken and discover one leg is not soldered or its pad it's not connected to the trace anymore, could have started by touching random stuff with your fingers but have been sucked into the black hole of schematics/reverse engineering

[@theflowbox]

@@gianseven Ma se cerchi di capire il senso del mio primo commento dove ho fatto notare che l'utente non ha video nel suo canale... proprio per far capire che questo "è un video in youtube" e non una riparazione fatta in un qualsiasi laboratorio per fini commerciali, a me capita anche di rifiutare riparazioni un po complicate che richiedono troppo tempo e che non sono economicamente vantaggiose... ma io non faccio video per youtube (solo chi lavora in riparazioni e deve pagare arffitto, tasse e bollette può capire) ma non per questo critico i video in youtube che hanno tutt'altro scopo.

[@onetimelifebigcamera1607]

😍😍😍❤

[@aksuli1]

Where's the time stamp you find the fault? Too busy to watch entire show.