In the repair business, always think out of the box, Laptop screen backlight circuit repair

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[@essambakhashwein]

Lol sorin you made it vice versa by saying , "It happens when you try to replace the BATTERY while the SCREEN plugged in" 😂 0:42 But i got your point Sorin, God Bless you.

[@FrankMartin160]

Hahaha. Saying it so confidant. Lol.

[@ayaya123451]

the other guy did not Notice

[@ytdarsch84]

It's nice to see you happy and relaxed again

[@simeonmihaylov6123]

Sorin, do you know what surprises me every time? When something like this comes to me - I feel slightly anxious about how much I will have to spend to repair something like this, what I've learned from you is that the only limit is in our mind...if we concentrate and relax - everything is absolutely manageable... Thank you again.

[@branislavlonginov6797]

Dr Legend says most important rule: Don't trust the customer!!! Check by yourself first!!!

[@sup2069]

Same thing House said!

[@chainbreaker]

That's a VERY important lesson most of us learned the hard way. Is not really about "trust in the costumer", is more about "certainty of the state" of the things you are dealing with. keep it up Sorin, you are the best teacher in youtube (at least that i've seen so far). cheers from Argentina

[@danielbayugar4856]

The return of Sorin : The Master!

[@tinkmarshino]

I used to think of the laptop as such a delicate and untouchable thing.. Now when I look at them I know what I am looking at for the most part and it has become less a mystery and more of a puzzle.. thanks Sorin

[@DanielsGameVault]

The main power rail (after battery or adapter) is called B+...easy to remember :D

[@metalacos]

Master is back, thank you for all your videos!

[@bbg00000]

0:40 tare inversiunea :) spor la traba!

[@TheMausebert]

We should get more Sorin joking around and showing more his personality

[@anjrittuladhar1992]

it's really really worth watching your videos Sorin 'cause it makes us feel good. Let's say it refreshes everything around us! :)

[@amnesiagreen214]

Respect my friend. Blessings from Belgium 🙏

[@nilomyki]

Fascinating Sorin - great thinking and an insightful lesson here.

[@VladimirMarkovic]

As Dr House said "Patients always lie" so Sorin has his own rule "Customers always lie" :D

[@juliusvalentinas]

This is the truth even if you fix for your friends.

[@Sadenki]

Thx god you're realy back, I can't work at shop if I can hear you're voice on background :)

[@mogazymogazy1599]

شكرا على هذا الشرح نتمنى لك السلامة Thank you for this explanation. We wish you safety

[@Jan3Sobieski5]

Another great video Sorin. Diana not back yet?

[@medicfour9268]

Welcome back Sorin!

[@abuubakarosmanaweys9106]

Thanks for sharing your knowledge 👍👍👍👍

[@ohmware2020]

you said it well sorin... very nice work. greeting you nice day ... from philippines

[@RuiRex]

What about adding a fuse on the new connection? Maybe next time someone replaces the screen and "remembers to disconnect the battery", some magic smoke might escape :D

[@laboratorioassembler]

Why to an always "on" power line? This mean that the 14 v are always on screen circuit board... also when lid is closed... isn' it better to find a b+ that come to 0v when lid is closed?

[@gargantula3274]

The 3v power that turns on and off is probably connected to a transistor that acts as a valve to allow that 14v to power the screen when it's open. It's kind of like a car stereo, it always has 12v going to it, but it doesn't turn on until the ignition switch activates the accessory power.

[@kameshprasad150]

Nice conversation sir

[@giorgostexnikos6976]

amazing video.thenks for lesson professor.

[@smilemore209]

Thank you for this video Sir. Keep up the good work!

[@herrlip72]

If no check you will have, 'it was OK before I brought to you'

[@SolveElectronics]

i see its colleague roasting day today

[@__anil]

Thanks for providing your valuable information.

[@markkalembelembe323]

Is it possible to use brutal force (Current injection) to find a short in main board for TV?

[@zx8401ztv]

Ha ha you have to pull his leg :-D He wont make that mistake again lol.

[@jakubmrozinski1273]

Hi Sorin Thank You for your next Video

[@medicfour9268]

@electronic repair school I have a graphing multimeter that runs off of 2 D cells will the LCD screen have 19v also? It will not power up, I think, so I want to test the screen to see if it is still working but unsure of correct voltage to apply. 💚💖

[@jalal76]

you are still the best ........ thanks

[@mjustinmeyase1568]

Hahaha such a fun work place. Love u guys

[@grizzli211]

Hi and thanks a lot for another good video

[@miagi84]

Haha, hold him accountable Sorin.

[@remu3881]

Great video again thanks

[@GeekBii]

This 12v line is Always on. The backlight also stay on all the time even when the computer is on sleep.

[@kohiteteketrepa7669]

Good lesson . Thanks

[@SmoothJaZzFusion]

Sorin Best 2020 "No light no life"

[@Shashika800]

Good job

[@kriswillems5661]

Is the screen still as bright as before? Are you still able to adjust the brightness?

[@rezakianpour9668]

yes it's gonna be fine it had another line from B+ to the screen but it wasn't too promising now it happens to have a new proper one that can handle the amperage that the screen needs

[@rezakianpour9668]

and about the brightness it also is going to be fine since he didn't play with the LEDEN an LEDPWM signals

[@kriswillems5661]

@@rezakianpour9668 For brightness not only PWM is important, but also voltage, not? There must be a reason LED-screen power supplies are 19V and not 12V, because having another supply makes the design more expensive. Does the screen have it's own step up converter, and if so, will that converter survive the input voltage change.

[@pihmusik]

[@jamesattanah9699]

Lol...it's never fun when something breaks in your hand

[@ronaldchami1566]

Hello, how can i send you my laptop to fix it? Do you have a website or shop page? My laptop is asus rog gl753vd turns on and off immediately. It used to turn on after 20 attempts but now not coming on at all.

[@boolfnasa2582]

Hi Sorin, thanks for the alternative but what if the source is directly from the battery? then the backlight will stay on all the time and empty the battery, right?

[@electronicsrepairschool]

Wrong! The backlight on/off or the brightness is controlled by the sio chip. Like i said, there its voltage all the time with or without the modification

[@boolfnasa2582]

@@electronicsrepairschool Makes sense... Thanks...

[@zapatobama8301]

hi, i have a LENOVO T440P i am using a 2.0 ah AC adapter for it and the battery is 99wh and the PC itself require 3.25a -5.5a. so i went for a 4.5a charger. which couldnot charge it for unknow reason. i get some error saying it can only charge when the pc in sleep mode. after i plug back my lower amp charger which was working it does not charge the battery again. the power button blink 3 times then go off. with only battery it work well. without battery and only on my old adapter it also work well. but when on battery and you plug in the AC adapter , the power button led just blink 3 times and it does not show on taskbar nor charge the battery. kindly help

[@electronicsrepairschool]

Hi, please ask on our discord server, thank you

[@zapatobama8301]

i am receiving NET::ERR_CERT_AUTHORITY_INVALID

[@jocelhanz6543]

Did wire directly connected to the pins?

[@HalifaxComputersRepair]

hey how do have 2 webcams running at the same time and doing the switching , i dont get it ?

[@kameshprasad150]

That was very funny one sir lol😂😂😂

[@safetymeasures1984]

I could see on twitch you too Sir.

[@SniffElectronic]

Why would Dell i3 laptop powers on as soon as the DC cable is inserted, and when you shut it down, you cant turn it on with on off button, only bu disconnecting and connecting dc jack from power adapter? Also, fan blows full speed all the time? Any ideas?

[@djtongi]

But Sorin... this is a very simple Laptop and the mainboard is very easy to put out... wouln't it be better to put it out and check for fuses? Now if there is a problem on the screen again, you will have no fuse... i think this is not so good.

[@leakim971]

Thank you!

[@Scalee]

The wires were sent by your discord admins, i believe.

[@kintag4459]

thank you M.r

[@neelbanerjee3086]

very nice 👌

[@SniffElectronic]

Man, you are the best :)

[@marcopaiva_]

Have he apologize? 😆 Hit is his fault, yes it's he have to check before. The old screen it's good?

[@sabsab692008]

what if u take the battery out and turn on the laptop using only charger?

[@MindYourBusiness1970]

I killer a screen 2 days ago, hopefully the tax should be payed for the next season

[@thearsabre]

شكرا

[@FlavioCasimiro.dancer1983]

What if we only have backlight with charger connected? I have a asus x555l that shuts down the backlight when I disconnect the charger. The battery voltage is 8v but without battery I have 12v at the charging circuit. I used a power supply to inject 12v with the battery connected and the screen backlight started working. Do you think it is the screen or a faulty battery? Btw that 12v injection draws 3,5 amps. I think is too high

[@electronicsrepairschool]

Hi, please ask on our discord server, thank you

[@Mr.Smith_Mr.Wesson_andMe]

what is written on the battery?

[@FlavioCasimiro.dancer1983]

Already asked 2 days ago. No one answered. The battery is rated 7,5v

[@AnonymousRepair]

@@FlavioCasimiro.dancer1983 It the lcd screen that is faulty the back light ic on the lcd is faulty had a few with this fault just replace the screen

[@kriswillems5661]

12*3.5A = 38W, that's too high for such a screen. These screens are LED, just imagine staring at a working 40W LED light bulb, that's like a 400W conventional bulb, your eyes would burn ....

[@Pittsburghfix]

At work we have replaced 1000s of screens and only killed 1 or 2 back lights lol

[@bisengimanajeanfidele84]

I have a laptop which has exectry same problem but not 100% but when am using it like 1hour the screen goes off but still working in the background then at the same time to use it i have to connect the external monitor and same thing when i change a screen if some one got my point i need help

[@VideoServicesLI]

Sorry your camera went out at bad time to see end result where the wire went. I missed something maybe, what was the actual problem that was resolved - just a jumper to the screen connector as a qwik fix? Would like to see the actual fault/fix 🤓 Test the device in front of the customer when they drop it off so they can't say afterward "It wasn't like that when I dropped it off".

[@paulodagraca3469]

Just a jumper wire to prove a point, that the supply of Voltage was Missing on the screen. When connected to Voltage, screen worked fine. So Official repair can be done now.

[@VideoServicesLI]

@@paulodagraca3469 Thanks for the confirmation.

[@josuevillasante2546]

Yes is basic rule, YOU MUST CHECK FIRST

[@pauljephte3773]

Thank you so much. Please I need to have a private talk with you. Please.

[@FIXDIY]

Good

[@danielsaturnino5715]

You call those wires, but all I see are oficial brand proper very long fuses.

[@kavumanicholas564]

Fuse==wire

[@omousek]

Master :)

[@weerobot]

Battery issues...lol

[@onetimelifebigcamera1607]

😍😍😍

[@Mattia_22]

Be Smart Dont trust anybody 😎 lol

[@MAKVIPER]

Many people sends u different things//. Can u send me a camera smd amscope will be great if u can help

[@atoms1978]

Lep video

[@anjrittuladhar1992]

:)

[@Maciej.R.]

First

[@Wojtekeleser]

siema :)

[@kriswillems5661]

Dodgy as ever ... In my opinion you should at least have made an attempt to find the fuse.

[@AbdullahBordbar]

bye

[@phonephone-hu3un]

Cheap fix, not a quality job