Samsung NP400B5C flashing screen - Let's diagnose this & Fix this backlight issue

Рет қаралды 24,598

2 жыл бұрын

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Пікірлер: 110

@MilekaRobot 2 жыл бұрын

"Unpluging the batteryyyyyyyyy" 😁😁😁😁 really best of the best men on youtube fix scene 🦾🦾🦾

@MindYourBusiness1970 2 жыл бұрын

Last week I watched a bunch of old videos of your channel and the lesson about Power supplies was one of this videos. The point Is that you started the video saying this is not a video for beginners , this Is a video for advanced ( for me it was Easy) I have to thank you, I owe you my knowledge in Electronics

@Pirelli. 2 жыл бұрын

Another great vid Sorin. Guys, bring all your broken equipment to Sorin, he will fix it🧑🏻‍🔬and you will smile again!!☺️

@Trustsimo07 Жыл бұрын

never give up, Sorin .... Samsung lord of screens !!!

@digitalghost7381 2 жыл бұрын

I really like your videos even though I am near 0 with electronics knowledge :)

@spacecy 2 жыл бұрын

Great work! Thank you.

@ivomagalhaes1 2 жыл бұрын

well done, sir Sorin

@dellodel9502 2 жыл бұрын

it can be a faulty MOSFET . any way thanks , we learn from you as always . you are the best Mr SORIN.

@harrysthescientisttherapis2375 2 жыл бұрын

Wow you a great job 👍 Thank you for sharing your ideas 👍

@thekingofdakness8192 2 жыл бұрын

great content thanks for sharing

@zx8401ztv 2 жыл бұрын

Well done :-D That was a good mod, it works and no odd side effects. Some of my temp voltage injections have created odd side effects, still helpfull though :-D.

@JunPTechnician 2 жыл бұрын

Watching here sir with full support thank you for sharing

@computersrepaircotesaint-l7407 2 жыл бұрын

the best of the best tech

@rfr653 2 жыл бұрын

well done mate.

@ODRACLIVE 2 жыл бұрын

Thank you for the class, master Sorin!!!

@MrYosek 2 жыл бұрын

Nice master of electronics

@knightwar3 2 жыл бұрын

nice job

@koffibanan3099 2 жыл бұрын

Does the brightness control still work now? Thanks for the video!

@nakipelivan4007 2 жыл бұрын

Mr sorin magic man

@mustaphahammad1196 2 жыл бұрын

Nice one sir I love ur pro reasoning and I love more the doge ones

@johannbiker8803 2 жыл бұрын

nice to see you 👍👍👍

@Electronics_Repair_NZ 2 жыл бұрын

fantastic!

@mshezaan 2 жыл бұрын

Awesome 👍

@gimenaaustin7152 6 ай бұрын

Thanks, good video. I have the 3v but not the 12v... they don't come from the mother... maybe a cut cable. That's why I have an image but without backlight.

@Keksklopper 2 жыл бұрын

Hi there... I like to see how to fix stuff. I have a good idea for the next laptops and so on: I do it faster than you - when I see any outer damage like brocken connectors and so on and the laptop is still dead I remove the battery, BIOS battery, RAM (if possible) Keyboard and touchpad and other connectors from the mainboard. Only powerbutton, powercable and monitor stay connected. In that case you can check the naked motherboard for functions. It must beep eight times and any picture or other reactions. Then take one new RAM and test it with that part - picture should be visible - but still BIOS error. Sometimes the BIOS Battery is nearly dead and when you check it you'll see 2.9V or more when not connected. Connected it goes down to less than 2.5V. Most time the BIOS Battery is underneath the right or left side next to the touchpad.

@108Marlin 2 жыл бұрын

Good modification .possible weak battery??

@loizostheochari1509 2 жыл бұрын

Sorin are you suppose to remove the battery before disconnecting or reconnecting the display ribbon. So not damage the display.

@pilipinaskungmahal5881 2 жыл бұрын

wow your a good tech..can i do work or an ojt sir sorin?its a nice explanation...

@MrRvdbeek 2 жыл бұрын

You did take the screen cable off with battery 🔋 crashing…..😂 but if the battery is bad the screen flipping off so maybe replace the battery only? It’s a nice job don’t misunderstand it. Thanks again

@fluffyblue4006 2 жыл бұрын

This is useful info if you have a broken screen that is still able to light up but just shows garbage. You can make a lamp from it, by peeling off the layers of LCD material, until you're left with just the backlight layer and the inverter board that can power it. When applying power to this lamp, the inverter will not start if there's no input. So, you can do a resistor divider from the supply voltage that outputs 3.3V. Feed that into those inputs and your screen-lamp will light up when you power it. This laptop probably has some additional liquid damage, probably on the super-IO's 3.3V supply. I think it's just barely working on 19V and not able to work properly on the 12V of the battery. That's why the screen won't stay on and the power button doesn't work when on battery.

@davidasare6841 2 жыл бұрын

wow.... thanks for sharing this knowledge

@Evhen_Velikiy Жыл бұрын

Few years back i have made couple advertising screens that way. But for 3v i used 1117 regulators.

@Opapa-Jan 2 жыл бұрын

Can you please help me. Which microscope stand do you use, and where can it be bought?

@DanielsGameVault 2 жыл бұрын

That's not an inverter IMO - inverters are for CCFL lamps. That's an LED driver (probably a boost converter) :)

@tanishqbhaiji103 2 жыл бұрын

LEDs have inverters for driving the LED pixel array bias voltage but the backlight does only have a driver.

@StromboliKicks 2 жыл бұрын

curious about the brightness adjustment. is it working Sorin?

@weerobot 2 жыл бұрын

Quote of The Week.."Electronics is Beautiful..."

@konsehfelembomrex5839 2 жыл бұрын

I had a laptop that had a white screen and after testing I discovered the 3.3 and the 19 volt was present on the screen. But tcon had no signal. Any help please

@bustenarule 2 жыл бұрын

Hello.. More vidéos please...

@shamshadansari1765 2 жыл бұрын

Does that 3.3 screen voltage you bridged related to the power button. May be

@tanishqbhaiji103 2 жыл бұрын

It is indirectly related

@SmoothJaZzFusion 2 жыл бұрын

LCD_EN 3V3 connected directed no light control but work

@em0_tion 2 жыл бұрын

Sorin - just flip two letters - Rosin. Coincidence? 🤔😁

@tobiasmangoma9566 2 жыл бұрын

It can't be a good job unless we secure things with hit glue lol. I copied from you and I use it a lot.

@sharkshift 2 жыл бұрын

have you ever fixed a laptop fingerprint ?

@PhoneRepairRO 2 жыл бұрын

That AT19 display is a pain in the ass :)

@themanieq 2 жыл бұрын

What about brightness regulation? Will it still work?

@kisszoltan3108 2 жыл бұрын

And weak up standby of battery?

@MrDinakdakan 2 жыл бұрын

probably not but sorin did mention its the cheapest way, bridge or buy lcd or inverter

@tanishqbhaiji103 2 жыл бұрын

No, probably

@robbirobson7330 2 жыл бұрын

this could also be a bad resistor, if you run from adapter the voltage on the board is higher so maybe even with the bad resistor enough voltage is passing with the lower battery is no more enough to pass through. or bad contacts/ corrosions

@sergelavallee913 2 жыл бұрын

@robbirobson7330 2 жыл бұрын

@@sergelavallee913 yes especially when brightness is turned down when running from battery

@robbirobson7330 2 жыл бұрын

@@sergelavallee913 what do you think it is and the proper way to fix?

@sergelavallee913 2 жыл бұрын

@@robbirobson7330 If it would be a resistor the jump wire that Sorin soldered would not work and it does work so it's not a resistor. Sorry!

@robbirobson7330 2 жыл бұрын

@@sergelavallee913 the resistor might be on the mainboard not on the displayboard from the super io or 3.3v or supply voltage and transistor switch going to the display. i had this case with liquid damage exact same problem, flashing display from battery, cleaned and resoldered the corroded area and everything worked fine

@onetimelifebigcamera1607 2 жыл бұрын

❤❤❤❤❤

@sebastianretecki8278 2 жыл бұрын

Hey Everyone! I Wonder, if the issue may be related with battery itself?

@bblod4896 2 жыл бұрын

I thought about that too. I would have checked voltage without the power supply to be sure.

@charbelbatour8664 2 жыл бұрын

king

@Customer22374 2 жыл бұрын

Turn off intel power saving when on battery , you will see this option when you install the intel hd display driver

@eliadsavel8015 2 жыл бұрын

if you look on the youtube is only one video of how to repair the power supply module of beatbox beats by dr dre PLEASE MAKE A VIDEO FOR HOW TO FIX THE POWER SUPPLY MODULE OF BEATBOX BY DR DRE, MANY beatboxes by dr dre have problems with the power supply module

@tanishqbhaiji103 2 жыл бұрын

Use enamel coated wire Sorin and you didn’t remove the battery while handling the screen

@pendehos8845 2 жыл бұрын

I am not sure how this is considered fixed, if the battery cannot hold current to turn the laptop on but holds current pretty good when the laptop is on, that should mean the battery is sort of working fine unless tested more under load which you did not do to eliminate the assumption the battery is not good. So currently the customer has a laptop with working screen since it takes 3v from a different rail instead of the one that suppose to be provided to the inverter, which the battery supplies fine, so how is this a battery issue? I am confused, this by no means is a fix.

@laboratorioassembler 2 жыл бұрын

Sorin you placed 3.2v randomly ( on a selection of 3 pins ) on a chip without any scheme i can understand that probably is a low voltage ( and you lowered the Amps) and nothing (hoping) can burn... but how you can release a pc without checking the datasheet of this chip ? Just to have a confirmation that everything is OK... and also... what is causing the missing signal ?

@lordred7462 2 жыл бұрын

who cares as long laptop is working and job is cheap.

@laboratorioassembler 2 жыл бұрын

@@lordred7462 maybe next month the chip ( or the sio ) will burn... but who cares

@lordred7462 2 жыл бұрын

@@laboratorioassembler maybe it will maybe it won't. I'm pretty sure if Sorin occasionally burns customers laptops with hisn"dodgy" repairs that business he works for would be soon closed and there will be no "electronic school repair"

@laboratorioassembler 2 жыл бұрын

@@lordred7462 work as an employee make people not considering consequences of random tests and dodgy things... when I repair a laptop on my own shop every laptop is managed like mine. I do everything I can... to understand what is happening .. maybe I can't fix the laptop... but I want to be sure that no one can do a better job ( on my city) Looking at other members of the shop ( burned fuses... turned mosfets changing iPhone screens... ) Sorin is a god... and probably the entire business of the shop is based on him.... no sorin... no business. He can do what he want.

@Radek__ 2 жыл бұрын

@@laboratorioassembler yeah you're right. and the funny thing is that Sorin is very often saying that he NEED to do the job in the cheper way, or very fast, and by using only that things what he has. So he covers or stands behind those lies, but the truth is that, he can do what he wants to do. I bet if Sorin say to his boss - boss I need order 50 powerfull diodes for tv boards, and few mosfets, fuses, set of typical capacitors, and wires, flux, tweezers, etc. then I bet - one Sorin's word and boss is saying OK, no problem. BUT I don't know why, Sorin is lazy (he doesn't create a note what parts is missing during repair, to buy it for the future reparirs) and don't care about quality. My english is not good enough to say it more cleary, but I know what you said and I agree with you .Sorin HAS a power to easly increase job-quailty of this shop and power to ask for better tools. But he is lazy and he gives a shit ( i mean doesn't care). Watching his videos I',m very often impressed and angry in the same time. I don't understand for example -when he is doing good job with the hinges, and very close to his hands there is a cpu/gpu heatsink with fan full with dust and blocked heatsink ribs, and he is doing a sandwitch with hot glue and back-cover. Why the fuck, he don't care to spent 30seconds to flush that heatshing with compressed air or suck out the duct with vacum cleanner. and then customer will not open that cover easly because it is a sandwitch with glue. so WTF?

@ricardoacostatorres1350 2 жыл бұрын

I had this issue... but not having the equipment I replaced the screen 100€

@petartomic9783 2 жыл бұрын

So if that 3v are coming from super i/o, even if you put a new screen it still wouldn't work, you would still need to modify it. Correct ?

@electronicsrepairschool 2 жыл бұрын

right

@petartomic9783 2 жыл бұрын

@@electronicsrepairschool you also talked about internal resistance of batteries, and you were saying that with bigger internal resistance current is lower, so that also means that this laptop battery has big internal resistance beacuse lot of usage and can't deliver enough amps to start laptop, correct ?

@MilekaRobot 2 жыл бұрын

@@petartomic9783 Struja punjenja je manja zbog veće unutrašnje impedanse/otpora. Loša baterija i dalje može da uključi laptop (ako već nije toliko loša da ni to ne može) sve dok on ne izvuče struju...

@petartomic9783 2 жыл бұрын

@@MilekaRobot Ok ali u jednom trenu otpor postane toliko velik da nemože isporučiti dovoljno da pokrene računalo, ispravni me ako grjesim ?

@MilekaRobot 2 жыл бұрын

@@petartomic9783 Tako je, takva baterija vrlo verovatno više i ne može da se puni jer već dugo unazad laptopovi imaju zaštitu gde kada jedna od ćelija padne ispod određene vrednosti (poraste impedansa mnogo) prekida se mogućnost punjenja.

@widyahong 2 жыл бұрын

after watching ers now i never use hot glue gun, no i use hot air gun for melting the glue :D

@eliadsavel8015 2 жыл бұрын

POWER SUPPLY MODULE is defected on my beatbox by dr dre do you repair them if so please give me your address to send the module or should i send all the box ...thank you

@adaniel69 2 жыл бұрын

So now the problem is, you cannot start the laptop if is not plugged in... I don't think that is the battery... Most likely superIO or something else on mainboard... Not really repaired... Just make it a little bit better than before...

@electronicsrepairschool 2 жыл бұрын

U r perfectly right, but the idea of the video is fixing this particular issue, not actually the latop getting repaired

@2bad83 2 жыл бұрын

I had the same fault with this laptop....It was the battery.....You say it`s not the battery but 100% try a new battery without your Mod....

@2bad83 2 жыл бұрын

The battery has 6 18650 cells 2 in parallel with 3 pairs in series one cell has gone into protection the voltage is still 11.3v but there's not enough Amps you answered the questions yourself at the end??

@laptopibjelovar5144 2 жыл бұрын

Coil in led driver 95% cases.!

@mardina1a 2 жыл бұрын

Don't you have any testing screen to see if the problem is on lcd or mainboard? This type of repair disables brighness control.it will set allways max bright

@seckinseckin3919 2 жыл бұрын

if he had this tool, he would use that. i have TV160 7th TV Mainboard Tester Tools is it okay to test laptop screen ??

@Evhen_Velikiy Жыл бұрын

I bet main issue is a liquid damage on a motherboard.

@bogdanmustata5310 2 жыл бұрын

Ai scos si ai băgat mufa de la ecranul laptopului fără scoți bateria.....😀 Atenție. Sănătate din Iași.

@electronicsrepairschool 2 жыл бұрын

Cred ca ai ratat asta kzfaq.info/get/bejne/ZtWmhdBk2J_bk5s.html :D

@bogdanmustata5310 2 жыл бұрын

@@electronicsrepairschool La minutul 28:50 mă refer...😀.Nu am spus-o cu răutate.

@electronicsrepairschool 2 жыл бұрын

La asta ma refer, lipseste 19v cand e oprit, daca lipseste atunci pot scoate mufa fara probleme

@bogdanmustata5310 2 жыл бұрын

@@electronicsrepairschool Aaaa scuze

@electronicsrepairschool 2 жыл бұрын

@cagataykilic7978 2 жыл бұрын

Looks like you keep on losing weight, still on no carb ?

@MikeB_UK 2 жыл бұрын

"You think we can fix this?"... Every one of your regular viewers knows you can fix 99% of the laptops you get. The interesting part is how deep into the bag of dodgy tricks you need to go in order to find that fix. :)