Lenovo ThinkPad T490S No Backlight Repair - Screen went Dim after replacement
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- เผยแพร่เมื่อ 9 ม.ค. 2022
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Thank you for all this content and inspiring me to take up this skill instead of sending things to the recycling plant I can bring something back to life.
Visual inspection and diode mode measurements. Great video as always.
Rear opportunity to view the methods and skills of critically analyse and SMD repair work. Thanks for enable us to view and experience yours skills Alex!
Any Repairment's Videos you've posted always gave us some lessons sir..
thank you for sharing
Best tutorial I have ever watched on youtube. Bro you're HERO. Thanks for teaching the worl.
Imagine if you bring it to other shop and then they replaced the whole screen but they only fix the fuse. Thanks to Alex we learn a lot from him.
Same here in Holland.
You would be surprised how many shops are doing this. In all domains.
Actually he didn't fix it the fuse don't blow it self
Most of us will try to fix, fail and tell the customer a chain of technological phrases, trying to get the customer to pay for a new board. Northridge Fix repair and ship it back to a happy customer.
I want to compliment you on your saying, it doesn't matter which of the two connectors for the screen... I like that.... Job well done....you nailed it big time..
Well done Sir. Your work is really neat and I really admire your skill.
Nice job it was really satisfieing and clean.
Thanks for the work you do to educate the world in technology, May the Almighty reward you abundantly.
Do you mean to say that they charge for a screen replacement but only replace a fuse? That would be a dirt bag move on the part of the shop. I know they have to diag the problem but they should not be dishonest.
Remember also that fuses typically won't blow just because there was a reason that it blew
@@j.m.5995 who said that to you?
@@ahyaan2552 What you mean about that?
another great information video.. not just ordinary but extraordinary info for me as DIY technician. i can learn more and more how to troubleshoot and where to start troubleshooting when something same like in the video.. thanks
Lenovo seems to be a good choice overall. My Lenovo ThinkCentre was manufactured way back in 2009, but it is still fast enough to watch a screen resolution of 1920 x 1080 at 60 frames per second. So there is no problem watching YT videos or NETFLIX at this resolution and fps, and also movies and TV shows that are 100% free at a website that I found. I bought the Lenovo as a refurbished computer. So it only cost $200 CAD ($157 USD). Anyhow, the CPU stays between 40 - 55 C temp, the GPU 38 - 50 C, and the SSD about 27 - 31 degrees C. Good enough for me.
Many times an easy fix is the best fix!
It gives more time to work with more difficult jobs
Nice one Boss, always something to learn
This man is the lord and savior of electronics repair
Hi. I usually never comment anything on youtube what so ever. But i just wanted you to know my appreciation on your videos. I dont have any technical skills regarding your work, but i find your thought process and person amazing. Its just a great combination. So yea well. I wish you , your family - and obviously big boss the best
Mike I suggest watch a 13 part series called _What on earth happened_ by Ewaranon to learn that the earth is not a globe.
I got it in my about tab.
Nice work Alex. Sometimes you do get the easy ones, Hiroshima ones are interesting to watch as well.
Nice of you to start adding humor to your videos, keep it up
nice to see somebody like his job, can't fake that smile in the end of video :D
For reference if someone is going to replace your screen: Be sure you disable or connect your battery before disconnecting your display, it blows the fuse.
Wdym connect
Pls teach me
Great work as usual my friend. Thanks for sharing
nice work,fast ,effective ,efficient
Thank you for sharing all your hard work, help us alot to learn. Quick question, i have lenovo x1 carbon, its not powering on, power button blinks 4 times, fan spins once but not turning on. Any suggestions. Thanks in advance
great job, sir
it's great to see you dont have to replace the whole laptop just for the broken fuse
🤣
Awesome content, I'm really learning a lot when I go through these videos. Random question but how much would you normally charge for this repair?
I wonder what caused that fuse to blow in the first place. nice find 👍
Good job as always
Very good Job 👍🏻
i always watch your vid sir Goodbless from Philippines
Wow just wow awesome fix ones again Alex. Another tiny cheap part that fails and makes the whole laptop unusable crazy... we need the right to repair so we can get scematics. In the mean time we are lucky to have you and you knowlegde 👍
The fuses are even indicated on the silkscreen, such a refreshing change from Apple devices.
I've learn alot from you sir....Sandile from South africa
Sandile I suggest watch a 13 part series called _What on earth happened_ by Ewaranon to learn that the earth is not a globe.
I got it in my about tab.
Nice Thanks for the work
Dear Alex. I watch all your videos. I am trying to fix my sons graphics card (Sapphire R9 390 Nitro) and have determined the problems are a blown fuse, 1 mosfet and for good measure the 5V regulator on the backside. I have ordered all parts BUT I cannot get these chips off at 400c (of course with AMTECH flux). This seems way higher than other boards that I practice on at 350c and remove chips with ease. What temperature do you advise?
I did get the fuse successfully swapped by first adding low temp lead solder. Soldering on the replacement was easy using leaded solder. But I next wanted to do the big 5V voltage regulator and it isn’t budging at 400c. I am worried about damaging the traces if I go further up in temperature. Also I don’t think adding low melt leaded solder would work since this chip is surface soldered underneath. Just for added information, this board is black (not green) so I am guessing this means it can handle more heat than average? Not sure if that means anything.
Could you please advise the best way to get this chip off? I am guessing the last chip mosfet will be the same difficulty since it is also soldered from underneath and must be flow soldered off. I am using a good SMD rework station that can go up to 450c.
Thank you Alex ahead for any advice. Your videos are great & greetings from Canada!
Anyone else who knows the answer please also advise. Thanks! This is a great community.
good job mate.
Thank you!
Awesome helped me out . Thanks
Can you please show how to test more components like capacitors etc. since I’m not sure whether I’ve been taught properly
Awesome job bro keep rocking bro 👍👍👍
thank youuuu!! big help!!
If every job would be as simple as this one, just a little blown fuse. Nice repair. Good video. Thank you for that video. Greets
But the question now is why did the fuse blow? Hope it works forever
Must disconnect battery before replacing screen....
@@chriszahra4755 yes exactly. Always disconnect the battery first and every other power source. Also is it good to push the on/off switch to discharge all components of the board
You are the man👍
What is the best way to size up these bad fuses for replacement? Is it enough to just match up size? I have some other dead lenovos, maybe take the fuse from those? should those be cross compatible? Edit: I used a macbook pro backlight filter (labeled with a "P") and all worked out and my backlight is back!
Like you work... Quite expert...
Nice work
Nc job...sir Alex!
good job!
Guess what you saved me sir thanks so much for this masterpiece ❤
Achoo!! ..and it's gone..into the 9th dimension..lul you should do a vid with some of these components next to a dime so people can get a scale of how small these parts are. Love the channel btw.
Love you man ❤️
hi. I would like to put an external power button on a lenovo 3500 laptop. which way is the best?
I have two old Steelseries Cataclysm mouse that I broke via static from my finger. They dont' make this mouse anymore and used ones are going for $200 and up on eBay. Is it worth sending to Northridge to fix?
Very good knolage thanku
Good job
Lenovo is one of the best laptops. This means the motherboard has been taking care as it should. Just one fuse replacement!
Random but you should do a short where you do that shaking hand trend so I can have hope in being as precise as you or maybe knowing why I never will be
Question. Why old laptops working properly and new laptops have a lot of problems? I have an old Lenovo g550 from 2010 and it's working like first day. Greetings from Romania. I admire your work, I wish I could do the same same work but I can't afford the technology you use.
amazing boards
Good Job
Can you just jumper the fuse if you can't find a replacement? Is there any damage could occur?
Please Sr, I want to know of this item you use to easily unsolder and solder small components. Thanks
always nice to see when you suceed :)
Thank you for the Video, I' have Lenovo Idea pad 5 and suddenly the backlight is gone, I have tried another LCD same issue, tried External monitor and it just worked fine, do you think the fuse could do that? I know if the backlight on the motherboard got bad it should be same result on the External Monitor, right?
Good laptop in good hands
Very good Thanku
What did you use to test. Can you please tell me that?
Nice Vedio ☮️👍
It did not look like a fuse but a zero ohm resistor you put in?
Can zero ohms resistor be used has a fuse?
Hey brother ....love your videos ..would it be possible for you to mention the cost of repairs please ...we know that your skill and experience is really what a customer is paying but I would love to know
Hi bro do you know about LWS-301 Laser Soldering Station. soldering with laser no heat gun
which model of microscope you do use
There's a menu dedicated to battery connection on the BIOS on my Thinkpad X1 carbon laptop, maybe it's adequate to prevent blowing fuse while changing parts such as LCD
Even my 2021 Lenovo Legion 5 has it. No need to physically disconnect the battery. That bios option will disable the battery power until its plugged in or something.
That was quick one
But why did the fuse blow and what's to prevent the new fuse blowing for the same reason ?
Where did you find out the fuse capacity ?
Can you do a video on the equipment that you use? I've asked before on what hot air rework station you use, but it was ignored.
Weller WX 2021 Soldering Station
Quick 861DW hot air station
So you replaced a 3A (P) SMD fuse with a non fuse Zero Ohm SMD link component ?
Was going to comment the same!
I was thinking about the same here. Does it really make any difference? Could someone explain it?
@@FilipeNeto616 the zero ohm is basically just a wire it’ll blow just like a fuse if the current is exceeded
Since we are unable to call you guys for repairs anymore, I submitted a form to mail in a repair and still haven't heard back three days later oh, what's the best way to reach you guys now?
Can someone tell me what the chip he’s testing at 1:43 please. Thanks in advance
I once blew this fuse when I changed a faulty screen without unplugging the battery. In the end I replaced the whole motherboard as I could get my hands on one for 30€ which was cheaper as letting someone exchange the fuse. Sadly my soldering skills are not up to this task.
With ALL Thinkpad laptops (and possibly most modern laptops), it is REQUIRED to either disconnect all batteries or temporarily disable them within the BIOS BEFORE removing the LCD connector. Otherwise, the fuse blows when the LCD connector is disconnected as the LCD power lines are always "hot" even when the laptop is off. Older Thinkpads did not have this requirement as I was able to plug and unplug LCDs even while the laptop was on (for testing). Not sure when it started but definitely around the T460s and 6th gen Intel Core laptops as I had to learn the hard way. To be safe, always disconnect all power.
I blew a fuse on a T420 by changing screen without pulling the battery. I ended up piggy-backing the new fuse physically adjacent to the original as I don't have the soldering skills to pull off a full replacement. This guy makes it look super easy. Let's pretend it's all in the equipment 😀
Just remove battery. I guess it'll enough. The rule of disasambling electronics is disconnect all power.
You can't disable the LCD in the bios, the backlight power is from the main power rail, it's always present. It's this way from the beginning (from the T410 for sure), but almost all laptops have the backlight voltage direcly connected to the main power rail. (However sometimes you can disable the battery in the bios but it's easier to be careful and take a second to align the connector properly)
Nice 👍🏾
Awesome ✌🏻✌🏻✌🏻
Alex it is!
Good job boss
Hello boss
Nice
Muito bom 👍🇧🇷🙏
Waw i love you bro❤❤
Gd job
When i install a new lcd i take the battery out if not the battery would short out the lcd or led backlights
I watching from Bangladesh
That was quick
Disconnecting the Batts should be a no Brainer. Good job we have the Alex's of the Real World.
Easy one!!
So you just used a resistor as a fuse?
I have a set of PS4 controllers and they all have a problem with the power. The battery does not charge and the LED does not light, although I changed the usb boards. I am an amateur technician and studied this until the middle school. Please explain in a video how I can fix this
Hello, I have my Lenovo T420 notebook which no longer shows images on the very weak screen, I can't see it and with the audio outputs burnt out p2 and headphones, can you tell me where I can find the damaged part?
brazil aqui
ou sim voce tive um esquema eletrico pdf desse placa vai me ajuda muito
This computer fues pack where parching sir pl telme web page & conduct methods sir pl