Asus ROG G731G no power, overvoltage protection circuit diagnose & bypass

[@Nizzinny]

21:35 priceless! You should make a short video of those few seconds of fear!

[@washingLad2014SamsungDestroy]

21:35 sorin be careful you can get a heart attack

[@abdomocrim7526]

Lool your reaction to the sound is always fun to watch 😂

[@nadussee]

lol, that startup sound scares you everytime.

[@cfamozcomputermetropolis7191]

Hahaha haha yes me too

[@bukatanki]

Sorin, how did you start removing capacitors, and now you have started surge protection circuits and transistors, I am very much looking forward to the video you will post where you remove the CPU and the laptop will work again. You really are a king..... 😀👍

[@Timpano_Francesco_Repairs]

Hi Sorin, thank for this interesting video... good job bye Francesco Timpano from Florence Italy

[@pjhb_microsoldering_portugal]

Great video, thanks Greetings from Portugal 🇵🇹

[@robertbresler8634]

This video was extremely helpful. Thanks so much!

[@Negiku]

Nice proper repair.

[@strider0303]

Thank you for this video Sorin. you are such a good teacher. ❤😊

[@mastermindesrpr]

I prefer the "Say hello to my little friend!!!!" technique....😂

[@Mr_Shannon]

I enjoy watching your content I learn so much and you very inspirational. Thank you for the content 💪

[@tinkmarshino]

That sound had me cringing to.. what a thing eh? Well your sharp my friend.. I really want to thank you for all of these video's you have done for us.. I have learned a lot and at 73 that is saying something.. Carry on!

[@postfiresaw]

master of masters!!!

[@silvermoney7131]

Great repair Sorin

[@michaelcabilan745]

Newclesson new learning thank you master sorin😁😁

[@technical5880]

loved this one, when you use schimatic i understand whats going on.

[@mugomkelvin6399]

learnt alot on this video thnk you so much

[@Hefaistos95]

Excelent work!

[@ElMariachi1337]

That's crazyyyyyy hahaha! Thanks for the show again Sorin

[@beogeek]

Brilliant repair sorin good work mate

[@blackdotkiller1]

This thingy goes 💥 boom 💥 🤣

[@coetze]

Was that component you removed an optocoupler? Trigged by the transistor at the back of the board?

[@omarsayedahmed951]

Predator like situation. Hard job.

[@jesuschal3802]

Wow! What a lesson :)

[@hugovale8070]

Sorin , take the speakers out next time please , im getting worried now 😅 Nice work, tank's

[@radio-ged4626]

Great result - so much overkill in the design of the power supply.

[@marvinochieng6295]

Sorin for president

[@blackdotkiller1]

I went to the shop and said can you help sorin needs a new thingy 🤣

[@catalinneculai4541]

Love your videos on your style. I was thinking to send you a laptop. Nothing wrong with the laptop, but I was thinking of making lighter by removing components 😂😂.

[@rochedejager7862]

Thanx Sorin

[@wasimaktar2867]

21:36 mini heart block ❤😂

[@BlackLight1478]

That sound takes my soul always whenever it gets opened back automatically. It's creepy, thanks Asus.

[@TataGrassu]

Hi Sorin, thanks for your videos, they teach us a lot about repairs. Any idea why the voltage on the gates of the input mosfets are so high? Usually a voltage of 10-12 volts is enough, there are also logic level mosfets that need less than 5V for the gates to open and to work fine. Thanks.

[@CaribbeanParadise-cn3sy]

Great process / diagnosis . All those little steps got to ' We have Picture ' ... nice one.

[@BootedTech]

21:22 - Its working, without the overvolt detection thou?

[@mharszkietv]

great work and analizing every bit second. good job i like your style.. hoping you can guide me too.

[@8500gtNvidia]

Sorin, would you solve the problem just shorting out the first Mosfet as usual?

[@jurgenkruger3932]

OUVLO supervisor? ESD diode array?

[@winlose3073]

I believe Sorin made the circuit more efficient 😅this signal is coming from a voltage divider between the mosfets gates and the driver pin of the BQ, by the look of things Sorin bypassed this circuit .That IC which is an opamp circuit, probably driving the transistor off when the power is present but the chip is clearly faulty and not doing it's job. I was going to say that maybe a pull up resistor might be needed instead of the transistor but no the resistors exist already

[@glitchy8429]

That thing is maybe an opto? I’m thinking some logic through the BQ chip operates it in order to take 19v and spit out whatever the gate on the power mosfet needs to send voltage. 🤷‍♂️ I’m probably wrong though

[@chumatez]

Nice one

[@ppafan]

Does it matter where you place your voltage injection probe

[@MarvelousMarvinB]

Impressive.

[@mahmoudajjan466]

I THINK THE BLOWN UP CHIP IS AN OPTOCOUPLER AND OF COURSE THANK YOU SO MUCH ALL THE TIME 😊❤

[@emmanuelvalmas5648]

May I ask what's the theory of injecting 19 volts into the input? Isn't that suppose to be a very risky approach? Or because it's the main power rail at the very start of the input it does not matter

[@jimboymaster]

solid idol

[@ultravy]

I hope you put thermal pads as well... they are all gone when you took off the heatsink!!! VRMs and memory.

[@badvoiceallnoise]

ahahah asus 2 sorin 0. they got you 2 times with that sound.

[@leerzeichen1910]

Let’s be honest, his reaction to that sound made our day :))

[@projects4home]

Same with acer predators. Hahaha. Laptops 3 , sorin 0

[@bhoot1702]

😂

[@Teslamaniac]

Could it be an opto isolator for some reason

[@njmust]

genius...

[@Barbarapape]

Sometimes they over design these laptops and fit protection circuits that cause more issues than they prevent. It is interesting to see how may repairs are due to shorted capacitors which then take out other active components. After all these years they still can't make reliable capacitors. I have been replacing them since the late 60's.

[@mart43]

The main reason capacitors in laptops break more often is due to being dropped soft and hard frequently. In contrast, desktop PC motherboards rarely have cracked capacitors because they remain stationary.

[@Barbarapape]

@@mart43 That might be one cause of failure, but i repair consumer electronics and modern surface mount capacitors are a very common source of failure, even in items that are not portable.

[@mihaioleniuc1642]

Nice! 😎

[@blackdotkiller1]

👍

[@jamesgoodrum8779]

How do you get 25v when the main pwr rail only provides 19.5v???

[@saltcityrepairs5121]

I believe thats the 2nd time you got startled with that same sound LOL 😂. We always think somethings got blown up

[@imedtech1256]

nice

[@supernova1163]

hello which video did you test laptops at 25v? i cant find it.

[@silviuguseila2552]

I did see it, but hard to find

[@GregM]

Please please please change your mouse cursor to a black one so when you go to a schematic we can actually see where the cursor is on the schematic.

[@simisongwenya2442]

😂😂😂😂 that sound Sorin will probably get you down one day

[@johnsmith-mn2pl]

Here's what I think. I think Sorin's hot air works 10 time better than the hot tweezers

[@shahjul4596]

17:48 we have 14.42 Volt and some time later 19:45 we have 1.075 on same ponit how 🤔?? Pls explain me.

[@jameskidd7906]

Perhaps it is a zener diode

[@viralbull8085]

this asus are going to give you a heart attack one of this days

[@candabi]

Hahaha, sorry but I could not avoid to replay the scaring scene five times. I know that sound is crazy, but funny hahahaha

[@senzothebusheletronics8913]

Optocopulor it

[@Pihmusik-PiCh-Expert]

[@hamdiadem5803]

how can i contact you mr sorin

[@aechtabayer5434]

How u knew thats the one transistor you should remove at the end?

[@g4z-kb7ct]

That solder ball on the input mosfet was disturbing. I hope you removed it before closing up the laptop.

[@c_daily27]

I have like this type laptop. Mine was G531G. The problem same, have no power. Was serviced twice. Then the chipset blown. After that im surrender then sold

[@beer_goggler]

What's better than faulty capacitor? No capacitor. What's better than faulty over voltage chip? No over voltage chip. What's better than a good transistor? No transistor. And we have picture.

[@Bruuhhhhhh]

Asus ROG laptops and their boot sound have been terrorizing customers and technicians for many years now

[@OkwalingaYolam]

What are common causes of black screen but the computer runs normally? Looks like it it's coming to BIOS screen but nothing remains black

[@blackdotkiller1]

All I can spot is a raging Volcano 🌋 🤣

[@Alex-zn8ix]

I don't understand something. at minute 17.50 there are 14 V on pin 4, then at minute 19.48 it is 1V.

[@Leon536d]

Do you sell laptop?

[@richeobrador1976]

Looks like opto coupler

[@Jakesssssiter]

Hello guys,I raised the cpu voltage from 0.7V to 1V from bios after it restarts only black screen nothing else.please need help

[@adaniel69]

well, goodbye overvoltage protection for this laptop...🤣🤣🤣

[@SamiTM]

Laptop risen from the dead going at Sorin... BOOOOO! Bu hu huuu 🤣

[@lucataszarek8782]

Hello🤝👍👍👍👍👍👏👏👏👏👋👋👋👋👋

[@richardowusu7536]

I hope someone work on it l think soo😮😮

[@JoeBlogs720]

Gaming and laptop I would not use in the same sentence.

[@Denise_in_progress]

It's a voltage regulator

[@SikandarKhan-dh9ee]

😂😂😂😂 Sorin Your reflex action was LoL haahha

[@rodsco357]

Scares you every time 😅

[@hamadyt956]

Its the third time you got scared 😂😂

[@89jacek]

21:36 :DDDDDDDDDDDDD

[@Luzt.]

I hope your electrician believes in fuses and your plumber in safety valves.

[@wendelljackson1488]

The removed device looks like an optocoupler.

[@ashraffrancis]

Dear Sorin I have two apple macbook not start if I can send to you one frist to fix then the other I live in Holland put no trouble I can send per post and pay per bank then u send back if its possible I will be very thankful Francis

[@GregM]

As Sorin said countless times he only accepts work from within the UK due to huge shipping and insurance costs sending stuff back outside of the UK

[@paparazzo80]

no capacitor no short :)

[@sniper5406]

21:36 AAAAAHAHAHAHAHAAAA this is so fking funny aahahahahahaaaaa

[@florinmacarenco7547]

This is emotional damage... that sound is against Geneva Convention.

[@gower1973]

Yeh it works for now, but next time it overvolts, dead laptop

[@satsumagt5284]

That’s why in spite of my admiration of his knowledge, I dislike his dodgyness

[@silviuguseila2552]

He explained that many times, including in this video, at 22:25. But overvolt how, the charger has overvoltage protection itself

[@silviuguseila2552]

​@@satsumagt5284I think a lot of times, his knowledge is so deep he actually knows better than us what can be left out. A lot of people used to be furious he is not replacing the capacitors, now more and more understand why...

[@OMARENGG22]

We heard it 😹

[@elfolie]

Wire where is Wire

[@ivarsbrinkevics5157]

Nice not working motherboard!

[@Reisskraft]

lol