Reflowing random IC's, can be called a fix? The laptop screen technology, is changing! Lenovo 720s 

"Reflowing random ICs and calling it a fix?" - Well that is what 90% of repair shops do...

Nice one Sorin. Hopefully the customer has access to his Bitlocker key lol. I've had a nightmares with customers and Bitlocker keys. 😅

If the Bios is not encrypted and you can boot from a pendrive, then you can test laptops with a Linux Live Distro on a USB pendrive.

What did I miss. The main power rail is 8 volts. I thought it should be about 19 volts.

Try hit combination with Fn + f-keys to adjust brightness. BTW you can have a stick or external ssd with windows install partition on it, and boot from them to make tests. So you do not have to rely on custommers ssd/hdd. Very usefull to have your own windows on a external storage thing for testing purpose.

Has anyone noticed that the last aprox 10 videos are from the shitiest brand Lenovo. All issues are pointed on that brand! Like Sorin said before, it cannot be nice, it's Lenovo..... 😂

BitLocker recovery usually appears when you fix (or exchange) a motherboard, or change the bios, never seen it happen when fixing a screen. I mean, the system was on at the beginning of the video, I don't understand why it showed up after messing with the screen, especially in that case, it was just a reflow.

Salut Sorin Nu știu dacă are relevanta dar am observat ca o bobina a făcut o basica... cand făceai reflow la cipul al 2.lea. Dacă dai cu o viteza mai mica se vede bine. Se întâmplă la fix 10:46

Reflow fixed the problem? so the new soldering technology is dodgy. and reflow is the fix for it and nothing else !

Actually, from my experience working as a diagnostic tech for Digital Equipment and contractors, sometimes this is the only solution left after the bed of nails tester and logical diagnostics fail to fix the problem. Solder reflow on surface mount components can have some tricky failure modes. A good microscope and patience can lead to success.

Lenovo saw your laptop screen repairs and its challenging you lol nice fix

Salut,Sorin cum pot lua legătura cu tine sunt în Scoția lucrez într-un magazin de telefoane și șeful meu ar vrea să colaboreze pe viitor cu tine pentru ceva reparații dacă ești interesat! Mulțumesc

Strange fault, but a fix is a fix.

Cold solder

"recovery-fingy", a rubber-stripe is a "fingy", a chip is a "fingy" ...I like this flexible word, I can imagine, what it means, but what is it exactly ..a "thing", haha? (I'm not a native speaker)

If a reflow fixed the issue it's a fix 👍

could osciloscope help here?

Many thanks majmune (meant as endearment please don't get me wrong), I have learned a great deal from you and wish you the best. Gott mit uns!

Maybe they watching yours video and remove dim signal.Great video.Thanks

hey Sorin, what temperature did you use to reflow the ics on the screen?

Good job. I have encountered this on laptops where the customer use the laptop with high load but screen closed (external monitor) and the heat from the laptops house is heating the screen. It can even cause the screen to die by heat. My experience that this only happens on laptops where the heating cooler exhales to the screen side. On other models like Asus x55X the laptop even shouts down because of overheating under load.

How about reballing? What is it actually? My laptop died The technician did a "reballing" He charged me the equivalent of 60 dollars for a laptop that cost me 400 dollars brand new It worked for like 10 months then it died again with the same symptom Now the laptop is a paper weight

that is probably OLED... hasn't got a backlight anymore, the pixels are lit by itself, has no more dim signal, is controlled by the image processor.

newer laptops becoming more and more flimsy causing lot problem for second hand and refurb market. older latitudes and XPS never bent

Goddamn lead free solder and BGA chips !!! 😠🔥

They assemble motherboards using a cheap lead low melting point = low cost Company nowadays prefer low cost to earn more.

If You can adjust The brightness, may be taking 3 voltage measurements in both chip pins, at full, mid and low brightness in orden to.identify pwm on the 2nd chip, of course si a lots of time, but just a thought

Was it reflow, connectors reseated, or just some good luck/magic/voo doo? Win some and you lose some. This is a win

ATTENTION SORIN: I found a way to get past the bit locker recovery screen: 1) Boot to the blue recovery screen. 2) When the screen comes up, hit escape. 3) It will show that it is starting bit locker recovery and then go back to a blue screen where it asks to enter the recovery key; don't enter anything. 4) Hold the power button down to power off. 5) Power back up. It will boot the operating system. I've done this on 2 different HP laptops.

One thing Ive noticed lately is that a lot of devices are leaving the factory with a lot of cold solder joints and a simple run of it with my soldering iron or the hot air resolves the issue and the device never sees my workbench again. So yes a reflow is a fix lol

If a replacement LCD was 55 pounds, that speaks volumes in regards to what the actual whole sale cost of the laptop was is/was new (or should I say what it's actually worth). You are a real Trooper (and a Savior) to a Lot of people. At this point it's still a joy to repair laptops.....Only if it's mine because it's a real crap shoot these days. LOL Thanks for another look at what the consumer is faced with (unknowingly) when buying electronics in today's market.

Flux and boil baby. You know it's right

On some laptops you can adjust brightness in BIOS.

That flex on the LCD! Good grief this things almost made out of butter.... what happened to laptop's with actually DECENT construction???!!

E bobina din stânga sus de lângă cipul mai pătrat

there is a little sound in you last videos like biiiip where does it come from

I give 6 month ++ repair And maybe i said a lot time

We need a repair about microsoft surface laptop

Master of electronics

I learn a lot through your videos. Thank you

Lead-Free Strikes Again...

When are you starting your repair course?

looks like Lenovo is your main client..:)

Cracked solder probalby.

It’s only a temporary bandaid. I had this putting a GPU in the oven. And the problem would just come back after a week. Sometimes it was very long term and was even able to be sold.

With Sorin we learn all tricks that we don`t find in books.

Some have the lucky touch.

I think it's easier to just replace the whole screen :)

Fair demonstration think that could be common on Tablets, just brought three of them with screen crashed for ten euros. Two are Ipad, lol, one is a 11'' from Huawei, will see what I can do if it's possible to repair for my apps for synths with the teaching you made by past about tablets. Mine I learned about battery locked, not charging and relation ship between charging current and amps needed. Also usb mess as everyday I plug and unplug the USB c, that's actually the fourth cable I buy. Helpfully, a light on the cable indicate when it is not charging well. The last screen I opened seems having no problem, but I will verify the three currents like you shown, but first I have a oil liquid damage through the left loudspeaker to the screen connector, one component is damaged the board seem's working, no short anywhere. 🤗So I have a New job! This is a nice laptop, brought on the weekly city outside market for dvicy levas in Bulgaria, wich is near ten euros. 🙏🧡💚

bad contact on solder.

I miss secret component

the experience had to kick in on this,wow thanks

hi can you please help me find key buttons to unlock advanced bios tab 🙏 device model is lenovo L340-15IRH

If you can’t verify if there’s power being drawn by back light, can you try placing a length of wire inline on the positive side of the display power feed. Then take you new owon oscilloscope and a split core amp transformer (from a small amp meter) . Attach the scope probes accordingly then try cycling the dimmer button? Or just use the scope probe to back probe terminals to try to find the dimmer signal. Maybe oscilloscope can detect when dvom can’t. Cool video as always!!

Just wondering if this is just a Lenovo screen (no dim) mod or if others are going to do same. That bezel is more like just a piece of tape - what crap! My guess is that the reflow is only a temporary fix - these 'cheap' laptops aren't meant to last more 2 years. They probably made the screen that way intentionally so it would have to be replaced. Would be interesting to know how long the reflow lasts. 🤔 Good to see you show us a workaround fix for this fault.👍

You can say what you want about screws ... but they're damn handy to open and close things up ... shrinking stuff too much leads to a heap of extra problems

Noice

I had the same problem under Win 7, the icons were flashing, disappearing, the start menu stopped. The cause was the bad battery, showing the X. By regularly starting the laptop on battery, leave it to drain, stopped the problem, and didn’t happen again.

Alt+F11 or Fn+F11

Great video

Yes is a repair.

Maybe this laptop has got hdr screen and the extra chip is for backlight brightness - in picture brightness adjustment or something

with those very thin laptop it always fixed by reflowing. we shouldn't try these type of laptops

You won't be able to boot in the os until you put the bit locker key, best you can do is to swap the drive with one you own and that has an os on it (or a usb stick with "windows to go" on it, you can make one with rufus after you downloaded the windows iso with ms's tool). It's very annoying, but what you can't do anything about it.

A lucky ducky 🦆👍

Hope its not a floating bug, when its problem return sometimes.

haha nice!!!

It seemed to be a floating ground issue. Somewhere between the chip and the screen

Trop fort le Sorin comme d'habitude, merci...

Nice fix Sorin, I always enjoy seeing your expertise in action! One question: this panel has LED backlight, so why would it be driven by an inverter circuit? Surely it would just be driven by a DC regulator (with PWM control for brightness)

Soon you will need to connect the leds directly to the main rail.

If its no longer broken, its a fix haha

"I will not say nice". Phahaha! Damn it!

you can test adjusting brightness in bios

Hello🤝🤯👍👍👍👍👏👏👏👏👏👋👋👋👋👋

Hey man that's the way it is sometimes🤷‍♀

Skill and luck all in 1 sorin

fantastic

Hello, Good work, as usual, Mark, Cambridgeshire

What did you use to replace the sticky tapes under the screen? Hot glue? ;)

👌👌👍👍

For testing in cases with no access to the storage, you can just boot a live usb windows/linux OS.

Most people will say Sorin was "just lucky" but we know its not , its called experience !

Mulțumim pentru lecție! Poți să-ți faci un stik cu un liveOS pentru teste. Sper că ești bine! Sănătate!

First ❤❤

hi I want to know, how could I fix the overheating of motherboard.

Hi Sir Sorin. Awkward as it may seem I just have to reach out and ask if you may be generous to share with me any one of your old cameras even the worst of them all I will greatly appreciate. It will be a great help to me.