Hp Dell Lenovo, this is one reason why the board is not coming on

[@johnoddvar1967]

It so nice when you invide us in your mistakes. Everybody makes mistakes, but some like to make it seme they are perfekt. You are in a división higher. Thank you Sorin. I learn so much from you.

[@Oak690]

Sorin - this video inspired me to go back and work on a laptop that I had worked on previously. This HP laptop had a bad display cable - I replaced the cable, all was working perfectly then a couple of days later the laptop just stopped. It acted completely dead just like the one in your video. Charge light was on, turned orange when the battery was installed. Really a sinking feeling when something stops like that after you worked on it! Well I discovered I made a mistake also! I didn't fully seat the power button cable in the motherboard socket. It was only in the socket part way which was apparently enough for it to work for a few days. I plugged the cable all the way in to the "line" and all is working perfectly again. I was very happy I didn't have to take the laptop all the way apart again! Thanks for sharing your knowledge with the world and being an inspiration to fix things that are broken!

[@kayondodirisa7153]

May the lord grant you abandantly.... watching from Africa-uganda-kampala city.

[@andyturner1727]

Thanks Sorin , Great to see you in action . : - }

[@stevey1783]

Been watching for a while and wanted to say thank you for taking the time to share your knowledge and experiences with all of us. I know personally your videos have helped me several times.

[@transformateur9969]

so happy to see you again! thank you so much

[@robinchaster933]

Your instruction video's are great. It is just like you were at my bench carrying on a discussion regarding the repair.

[@OverlandOne]

Thank you Sorin. I am now going to check this on my IBM ThinkPad T60 which just shut off one day, and will not restart. I replaced cmos bat., charger, tested the ram, even replaced the motherboard. Still won't turn on. I have 20 volts at the motherboard connector pin but, that is all I checked...I never checked for voltage or short on the center pin which I will do right now. I always learn something from your videos. Thank you.

[@juanchizabaleta2405]

Thank you for your time, those valuable tips, Master Sorin; those types of failures ,are the most difficult to detect. Greetings, from South America, Argentina.

[@geekjit215]

Hello Sorin, I watch your videos regularly and I like your work a lot. I would like to point out some additional findings I have got regarding this issue. Sometimes, without the middle pin connection especially in DELL and HP, the battery will not charge and the laptop will perform extremely slow because it does not allow the CPU to reach its full clock speed. It typically makes the CPU operate at 800 MHz to 1 GHz. In some of the HP laptops, I have seen them to not power on at all without the middle pin.

[@electronicsrepairschool]

Yes, on the old hp laptops

[@parham5246]

My one true beloved teacher. Special thanks from Iran

[@shadrackongeri3810]

Soo amazing! Happy to learn from Africa.

[@simeonmihaylov6123]

Finally Thursday... Proper great time for Sorin :)))

[@andreilucian10]

I`ll love to have a teacher like you, thanks for the videos...i`ll learn so much from you!

[@em0_tion]

Thank you for the advice, Sorin. I'll definitely keep that in mind. 👍

[@ahmedshebl3396]

I really hope to visit Sharm Elsheikh on your next vacation in Egypt to meet you in person...good job..keep going

[@aw0718]

Its Very difficult to find this kind of fault!!!You are Master!Thank you again to share your knowledge with us!

[@Ed31003]

THANK YOU SORIN!!

[@ahmadissa8607]

Great job as usual. Sorin please do one of the check tracing back from battery power in not from main charging port.

[@twingoman2000]

Thanks as always! 😊... I now bought the third broken laptop and first ps4 with briken hdmi port. The first 2 lenovos are back to life and I am waoting for the next jobs 😅.. Besides my soldering station, multimeters and powersupply I also bought a hot air soldering station because without it really is hard. I am a mechanical engineer but love electronics and with your vids I am going to do more and more of fixing things like this. I never biy new things because I love to fix things and save money 🤣... So please go ahead! You inspired me to do much more things like this, maybe I am going to quit my actual job because its boring even I earn a lot of money, I simply don't like it.

[@dexternengomasha7579]

My story as well. I am a boilermaker but I have fixed TVs, laptops and desktops cause of him

[@zoltansudar6674]

Thank You Master.

[@adimaxt6030]

Thx vor sharing from Germany

[@drgigioeaas]

Buenas tardes desde Mexico Maestro Sorin!!!

[@ricdelrosario9383]

Hi I really love your works I'm from phillipines.

[@tinkmarshino]

outstanding! very good information Sorin.. I would have not thought of this but now I will pay just a bit more attention to easy jobs..

[@eleimon]

Hello Dear Sorin. Thank you very much for the effort you are doing explaining everything from the a to z.. it is pretty cool the way you are showing everything!!!!! Can you pls make a video explaining the inverter what is it what is doing and what fails can find on inverter. Greetings from Greece !! I am a fan of you and your job

[@marko176schneider5]

Super Video.Danke!

[@doomdylan]

I had a similar problem with an universal power supply by trust. The plug for HP fried TWO TIMES the SuperIO chip, because it had the middle pin connected to +19V. Long story short, I had to change it 3 times before figuring out what was the problem. And all this because the customer didn't bring his power supply together with the laptop. I modified the plug of the universal power supply with a resistor on the middle pin, and now it works safely. HP are not all the same. Some tolerates 19V on middle pin, some doesn't start, some just get broken.

[@DumahBrazorf]

So basically if you play with its middle pin this laptop shows you the middle finger...

[@timothyokunola1518]

ahahahahah... people here are really funny...

[@protonx80]

LOL

[@gile849]

:)

[@Dr.muthanna]

Interesting info. Thank you Sorin

[@alor6643]

What cable is the middle pin? And u can show us how to do it? Please!

[@hazimhazim9235]

Thank you for this nice video Sorin 👍🏼🤝

[@glenperez6015]

Thank you for all the lessons

[@muhsinimruma802]

very useful videos thanks alot..

[@kanegomalcolm7218]

Great video, Educational

[@blink4you4]

Hi Sorin good point, one suggestion in case you do have an extra power connector with cabel check it first with yours and see if the laptop is working then replace.

[@ArRkDr]

Very humble..

[@MrRvdbeek]

Thank you for the video great info for making a mistake and still not working only power light 💡. 🤷🏼‍♂️😉

[@markpenn4831]

Excellent ! Thank you very much indeed !!

[@johntonelete]

Thanks!

[@peerlessgain204]

Nice Video Sir

[@7207691302]

Ur exllent practically tiching 👌👌👌sir

[@vicmartinez5603]

muy buenos videos colega saludos desde mexico

[@jxmai7687]

I just fixed one HP, the 19V DC-in connect with one transitor and provide about 3V back to the middle pin to tell the power supply there is not shot or power drop.

[@CamRecorde]

Thanks for your videos 👍

[@ibnelkhtaib9709]

u r my god father 😍😍😍 How cloud i support you ?

[@RRan-dk7ct]

Indeed...Thanks.

[@dijango2007]

First of all congratulations on the channel, I have been following this channel for a while and I like it a lot, it also helps me a lot, I wanted to ask for a favor, I needed the wiring diagram of the LA-C811P motherboard. I would be very grateful if you could help me.

[@shiftctrlhack]

HAPPY THANKSGIVING!!

[@Dmiliunas]

Priceless.

[@afghanoutsider]

Sir please when you work on chip level would you mind showing us what you do with your zoom in glass. So i can understand what or which chip or cable you repaired thanks

[@lesleymunro4964]

I'm not a fan of these new PSU "DRM" connections. You should look at that line with an oscilloscope, if you have time for a lesson. Many of these new laptops and PSUs have a onewire dataline, and it checks if it is a charger from the manufacturer. That's how some Dell's can tell they have a "Non-Genuine Charger". It's like the apple way of doing things, and locking down the parts with a code. End result, a captive market, and more expense for the consumer.

[@jxmai7687]

Also the problem is those charger hard to find even in ebay.

[@rogermoody2660]

It sounds really cool, ‘ I’ve got a new Dell, ya it’s really cool, in black plastic’ !!

[@lesleymunro4964]

@@rogermoody2660 If you're buying a computer to "sound really cool", you're doing it wrong. ;) :)

[@michaelmcdonald2348]

HP genuine replacement charger direct from manufacturer is cheap. The ebay fakes are actually dangerous. Many contain no protection and can cause fire. Ignore any power supply that has wording like "replacement AC adaptor". Watchdog in UK covered this some time ago. Also often come with an unfused plug (UK) and fake CE markings

[@lesleymunro4964]

@@michaelmcdonald2348 Genuine chargers are not cheap. Although that does depend on which income bracket you are on. Might be cheap to High value employees in the USA, Not so much to minimum wage workers in the UK, or worse, Poverty stricken Indian or chinese people. "Cheap" to you, could be a year of saving to other folk. As for protection and fire risk, you are right, there are many dangerous supplies out there, and I think everyone knows now that the CE marks are meaningless, especially from china. But this doesn't mean all of them are dangerous. There are actually some good Chinese PSU manufacturers, who use quality components, and sound design. But the difficulty is finding them. Buying manufacturer supplies is easier, but aftermarket supplies can work for people not as well off, and willing to do a bit of research.

[@davidlguerr]

That is why with those laptops that have a DC plug with cable to replace the DC plug + cable set, and you can buy them already soldered from factory, just needs to plug in. And it is not that expensive.

[@timmy5267]

I love your channel hope you and the family are healthy! One question, why don't you have a British accent? Where did you learn English? Other than your use of dodgy you could be in the US.

[@appiahishmael5340]

Great sorin

[@CHIWIS-Tv]

What did you do to the Red wire pls. Before it now turned on? Disconnected it?

[@luisvilleza2687]

Thank you it happen to me also now i can fix the motherboard that has the problem

[@AMAVOIN]

thank you very much

[@UsiraK]

Hello Sir, Is there possibility of damaging video graphic processor which embedded with the processor chip (in most of new laptops) if there is short in the power port of a laptop ?

[@donggoncha4128]

Really thank you for your kindly explain. So at this time I really wonder that the reason why hp, lenovo,dell using a middle pin in charging port? What is the middle pin 's function in this laptop?

[@paulodagraca3469]

The function of the 'extra' pin in the middle is to sense the voltage delivered to the laptop (inside the laptop). So normally the power supply adaptor will supply the 19.0 volt for the laptop, however cables are not perfect and connectors are sometimes dirty and all this will result in resistance and so loss of voltage to the laptop. As example, It can happen that the laptop will have only 18.6 volt not 19.0 volt. Some power supply adaptors will always output 19.5 volt as compansation. Better would be to make sure voltage is always 19.0 volt inside the laptop and not inside the power supply adaptor. This is where the middle PIN is used. It will connect internal in the laptop to the power rail en sense the voltage. If the voltage is too high or low it will pass this back to the power supply adaptor and it will compansate it back to exacly 19.0 volt (inside the laptop). Also cable breaks or short in power, all can be detected and be used to control the power to the laptop, so laptop will not die. Not all brands will have the same functions, they can have under-voltage protection or over-voltage protection or cable break protection, things like this. It is also feeding this signal to the super IO for information to controll the voltage and shut down if it is not okay. Also here not all laptops are the same, on how they have this connected. Where some are sensitive and others are olmost bulletproof. Hope this does help you understand the middle pin.

[@donggoncha4128]

@@paulodagraca3469 Wow.. thanks you for your detail explain. Wonderful. I read your reply twice.^^ i am a beginner in this field and it's really helpful for me. Also there are so many good persons in the world. Thanks sorin & paulo

[@ysabella6406]

@@paulodagraca3469i dont understand the problem and solution.. the middle pin is missing 19v so he make a jumper to the other pin with supply 19v?

[@paulodagraca3469]

@Ysabella Sorin has changed/repair the power connector on the laptop. Doing this work he has made some mistake to 'short' the wire of the plus and middle pin of the connector. In this case the HP laptop will check the voltage/data on the middle pin as protection. Because the middle pin was connected to the + (19.0 volt) of the power supply, the internal check in the laptop was wrong. The HP laptop did not want to start because of bad test (protection). Later in the video Sorin has corrected the problem, where he soldered the wire correct to the middle pin, and removed the short to the + of the power. Now the laptop started to work fine. This video was to show what can go wrong if you repair the power supply connector. Also Sorin wanted to inform people about this middle pin and that multiple brands now use this type of check pin (middle pin). This middle pin is not always connected in the same way by all the laptop brands, but they all use it as some check/test for the power supply. Hope this helps you understand 😉

[@xzoli8]

Regarding to your camera freezing, the cable, data or power cable is possible broken somewhere and cause a power or signal missing time to time or the port where is connected or the power rail of the pc, I have had similar issue with my usb wireless mouse glitch and saw similar monitor issues what you cant measure I think, hope this is helpful in some way. 😊

[@Franksxs]

I Miss you when you don't upload videos/Te extraño cundo no subes videos! :(

[@0dium.]

"... cuando no subes… "

[@Franksxs]

@@0dium. irónicamente esa es mi lengua natal y la que escribí mal jajajaja

[@mib1309]

Unde e filmuletul cu pinul din mijloc de la Lenovo ? :) )) Am nevoie !

[@mdGulabAlam-lj3cc]

👍 good sir

[@keithking1985]

I have a question about Lenovo laptops. I'm looking to buy a cheap second hand laptop and if the cheapest is a Lenovo is there a way of fixing the problem you pointed out in an other video with the start up chip being connected directly to the input power be fix with a resistors and 5.5v zener diode because I need a laptop badly.. But if it not worth and the zener and resistor could you let me know??? I would appreciate it it a lot.. Coz I'm a big fan of yours. And learned a lot from you.. Thanks from KEITH from IRELAND. I hope you can help me with this....😬

[@jalal76]

Thanks master

[@cristiansantos5742]

Thanks ( obrigado )

[@pradip123123]

Nice tips

[@MeFixingEverything]

Good one.

[@AnonymousRepair]

Had a Dell where some one shorted the id pin to 19V , blew up the protection ic which blew the super io (EC Chip) pin, the laptop still power on but would not charge the battery because it could not identify the charger

[@olanrewajuakinjola5378]

Good morning,i will be glad if you can assist me with repair tips on HP 620 with power problem issue.if i connect the power adapter it will flash light on led close to power jack and went off.but if you press the power button it will not power on.

[@ManikandanMani-ol7ix]

Thanks sir

[@zx8401ztv]

So it does not kill the super io chip, it stops the machine turning on. At least its better than a dead super io chip :-D

[@robbirobson7330]

it depends on the design, sometimes it also stops charging but powering on fine but its not detecting the type of adaptor. sometimes some diode or resistors are in the way that can be burned. i also came accross broken trace to super io and that was the reason for not charging, sometimes you just need to run a jump wire then from the middle pin to io. also a resistor in the line has gone up in resistance or broke completely

[@kriechllel1067]

My dell Inspiron show ac power adapter cannot determine 45W but i change may dell adapter with new one and dc jack connector maybe i have a bad motherboard? I need help sir Sorin🙏

[@A1999-p3s]

I have a question to a notebook repair! I have in the board a faulty diode and I can't find it in the internet, what should I do!? How I know it's faulty because it getting too hot!!

[@timothyokunola1518]

sir i checked a particular dead laptop. the output from the charger to the charger port was fine but the moment i plug in the port to the PC, it seems there is a short circuit that makes the power on the charger port to reduce the Vin to like 3.5 to 5v . i tried to check if any thing is getting hot...nothing was hot. i tried to check for 3.3 v on the bios and IO Chip but all are dead. the mosfets near the charging/power section are not also receiving any power.... what do yo suggest sir?

[@weerobot]

Lenovo's...Self-Destruct Mode...

[@charithmaddegoda8669]

can you suggest a good laptop brand to buy?

[@paulconstantin7282]

Buna ziua , detin un laptop G70-80 care nu incarca , am incercat si alta baterie tot nu incarca. Arata ca este conectat încărcătorul dar scrie not charging. Am verificat mufa si încărcătorul cu multimetru si l-am incercat si in alt laptop încărcătorul si mufa merg. Ar putea fi ceva pe placa de baza ars ?

[@romadisiregar7123]

Did you use an oscilloscope master? If yes, is 100MHz oscilloscope enough? Thank you 🙇

[@jomeat1259]

Sir I have WDF_VIOLATION on hp envy 360x . I am figuring out for days 😭care to help ?

[@christhackrsy]

Hi where are you based I need a new usb b socket putting on a diagnostic tablet and I paid £100 and it came off board first time I plugged it in. Been watching your excellent work for a while, would like to pay you do it?

[@adibot251]

buna ziua domnu sorin am o navigatie android china care nu mai porneste pentru passat b6 imi puteti da ceva detalii pentru a o trimite?

[@dbss206]

Sorin the heat pipe is slightly dented

[@carolynjones854]

What brand name is best to buy when looking for a laptop?

[@iftikharhussain1962]

Dell

[@drorhaz]

Dell

[@jackgarrison8497]

@@iftikharhussain1962 Yum Dell Pickles sorry I couldn't Help from making that joke

[@AliAhmad-sd4vp]

Hi... May God bless you... Please I like this job but I miss the basic of electronic knowledge... Can you help me with the video which started by the bigin...

[@andrewboraine7322]

I saw an HP logo on the screen for this 'lenovo' laptop 🤣😂

[@wayneslink]

Andrew Boraine obviously that’s not a lenovo laptop

[@santiagomaximiliano6091]

0:50 he say its a hp laptop

[@orange11squares]

it's a hp 255 g4, i have one like this.

[@singeminem2848]

so practically what you do to solve a issue?

[@islamcoherencepertinence.7226]

Can you give courses on line please ? Thank you! I really need it! Thank you.

[@saarike]

Great!

[@boyiyapaboyiyapa2488]

Sir its power button problem i solved it 3 - 2 time this problem in hp laptop first try to start with twiser if laptop come on them go on power button there you will see a 3 pin ic on power button just remove that laptop will be start

[@electronicsrepairschool]

That ic ... is this en.wikipedia.org/wiki/Hall_effect_sensor

[@paulodagraca3469]

Correct, you did mention this hal sensor in the video. 😀

[@manjujain8174]

I m boyapa boyapa with another pho s cause my phone is low battery now i did fix this problem removing that hall sensor

[@reacey]

You could have disconnected the power jack cable and plugged the battery in and see if it powered up

[@bFABIO]

The middle pin is not the plus????!!!

[@syambagaming9718]

Sir I need your help I have a laptop asus X553m series when i turn on my laptop the power immediately gets on and off and i upadated its bios too but still problems persists....... From India

[@jxmai7687]

if go off never be the bios problem, if bios faulty will stay on with black screen. some part of power rail is faulty.

[@Crystalservices]

Hi sorin

[@nanayaw7274]

Hello guys my laptop when plugged in has a blue LED but does not switch on and the laptop has no power when I remove the battery . Help 😭😭😭😭😭

[@MrDinakdakan]

where are you sorin

[@Pihmusik-PiCh-Expert]

[@johnjohn-it1os]

my brown pin on hp laptop is reading 0.7v i have 20 volt on the mosfets in and out i have changed the charging port but no light on the charging port no indication of charging can anybody help

[@tossancuyota7848]

dang these laptops doing doing circus designs just to mess the repair