Everything You Should Know About Voltage Injection - LFC
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- เผยแพร่เมื่อ 14 พ.ค. 2024
- One more thing of note, while this video covers text-book cases, keep in mind that there are always many edge-cases. Some more modern GPUs can read less than 1ohm at vcore, so great care should be taken to make sure a less than 1ohm short on the main rail isn't the same as the less than 1ohm of resistance through GPU vcore. Likewise, you can also have partial shorts, where a capacitor or even a fuse can be shorted, but still offer some resistance.
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Chapters:
00:00 - Intro, What is Injection
03:21 - What is a "Short", How We Measure It
07:58 - Low Resistance Circuits
10:00 - Equipment & Setup
16:06 - Assessing a Laptop
25:05 - Preparing for Injection
30:48 - Looking for the Hot Spot
36:01 - Removal & Replacement
41:55 - Testing & Conclusion - วิทยาศาสตร์และเทคโนโลยี
One more thing of note, while this video covers text-book cases, keep in mind that there are always many edge-cases. Some more modern GPUs can read less than 1ohm at vcore, so great care should be taken to make sure a less than 1ohm short on the main rail isn't the same as the less than 1ohm of resistance through GPU vcore. Likewise, you can also have partial shorts, where a capacitor or even a fuse can be shorted, but still offer some resistance.
Graham you would be one hell of a tech teacher you explain everything so plain and simple so everybody understands what you are saying .
He IS one hell of a tech teacher.
My thought exactly. What do you think he is doing...teaching
@@DMP413 he is basically teaching us on youtue but he could be a great professor at a tech college he explains everything in simple terms anybody could understand .
He is one “heaven” of a tech teacher.
This is the best video explanation I have found on TH-cam Thank you!
Thanks Graham, there are a few you tubers that go strait to voltage injection - they probably get it wrong a few times and call it a no fix and say better than factory when they have actually broken a fixable device 😀 I really like this logical approach. I prefer to take my time and get it right than rush in to save time. Many thanks for the videos 👍
I think I know who you are talking about😂 its never a fun thing to see an item being dismissed because its not worth the time or voltage injection wasnot done correctly
the bridge
It is good to use a current limited supply, but if you stay under the rated voltage of a circuit, YOU WILL NOT fry good components because if they're not shorted, they'll only draw what they need
Those old methods do still hold their wieght in the sense that if your thermal camera ever broke you have backup options.
Also I saw on northridge fixes channel he was trying to sell these voltage injectors but I was wondering what the hell is he going on about, he said he broke a channel on his power supply (not sure how someone that experienced didn't use a current limit) and that somehow a power supply isn't designed for voltage injection (like what??). That's exactly what a power supply does, it supplies (or injects) voltage,current and energy into a board.
It's like every video he's trying to sell you something or even better guilt trip you into buying his stuff.
Again....This is the ONLY video that explains this. Everyother video just shows someone injecting voltage, something glows, they replace it and look like a God.
best to use is a low ohm's meter that has a range from 2 ohm to 0 ohms .. they are expensive but super accurate for short finding
Just a multimeter with 1 mohm resolution would do the trick. They are mostly found in bench multimeters but you could also use 10 mohm res.
Also ALWAYS cross the probes and set voltage/amps before linking up to add power injection as some bench power supplies spike before stabilizing to set voltage
Especially if using an smps. It drives me nuts that you have to intentionally put so much strain on your bench supply because they're too cheap to add the ability to current limit another way. My wife got me a 3 output siglent for Xmas (which blew my mind) but it's spoiled me for setting current limit at the touch of a button. I have a longwei and kaiweets pair that are virtually identical except for paint color. I paid a fortune for the longwei and now it's less than half price. Kaiweets sent me the other for free out of the blue with an email (I signed up on their site because of discounts as I've given their dmms away as gifts) then demanded a review. Haha sure I told them. I was gonna start a channel this month for a local club I'm involved in but decided not to. But they sent this over a year ago. Weird ehh. I heard they did it to others as well. Someone gave me their ht208d clamp meter as a gift and it's one of my favorite meters and probably the most expensive one they sell. I have a fluke clamp that was twice as expensive with half the features and zero input protection on the probes. I've since donated the fluke as I believe they are not worth the money with brands like brymen making more feature rich meters at half the price.
Sorry for windbagging. Europeans are spoiled for choice when it comes to brymen. I had to order mine from Germany to Canada from welectron on ebay. I'll never buy a thing from welectron again. Their service is horrible. Stereotypical Germans as described by marco reps lol. Wouldn't except a promo code I had and wouldn't honor the warranty after 1 month.
Very educative video you should make more like these really liked this one thanks
Yup, I'm planning on doing a brand new Board Repair Basics series to replace my old tutorial videos that aren't super relevant to modern systems, and from a time where I had significantly less experience.
Please do.
@@Adamant_IT I would love for you to start with Dell (your favorite brand and mine too). All the best.
Bro, this is one of the great demonstration and explanation by anyone can do their best. I respect your afford taking to share your Knowlege with learners. Hopefully you will be blessed to bring more videos like this in future.
i had the same idea but still a very usefull channel
Respect for showing an ambiguous board most you tubers specially select the clear easy faults and create an artificial idea that what we do is easy and decisive
Great Video and good explanations. Thanks for taking the time to make this.
Great clear commentary on voltage injection. Love the video.
Excellent explanation! Thank you for sharing your experience and knowledge!
An excellent explanation/lesson. 👍Thank you for taking the time to make this informative video!
Super video! Great information, I always learn from your tutorials.
Really well explained and helpful. Appreciate the effort in making this. Cheers
Thank you for these videos! Everything is so clear and comprehensive.
Thank you very much for sharing these tutorials and detailed repair videos. I am patiently waiting for your videos.
Another great video Graham! Thanks for the 10 out of 10 explanation and awesome video work!!
Great video Graham!! Well needed as lots of people interested in voltage injection. Thanks
I was waiting for this coz power injection is a very sensitive area especially on the WHERE to push the amps. Thank you Graham
Amazing Video!!!! Best one explaining Shorts! God Bless you man
Thanks for explaining the short to ground term!
I like my DMM that also *shows* the resistance measured when in continuity mode, so, if I hear a beep, I can just look at the screen and find the resistance measured and inspect closer *if* it's a dead short or not. Props for not jump-cutting to the moment that it eventually powers up. That helps keep things realistic.
I love your graphics and appreciate how much time it takes to include them in the video. You have a way of teaching that captures my full attention.
As always, great content and really enjoy and look forward to your videos. Keep up the good work and my deepest regards
Great Video and perfect explanantion from start to finish including the tools and equipment that you use Graham professional as always.
Amazing...
Cheers!
Good and straight forward explanation...
i find it easy to listen to you and quite explanatory on the things that we should pay attention to so all my lingering question and maybe in the future repair i came backup with the reasoning behind to fix laptops faults or any other electronics, thanks alot!
Awesome!Thank you graham for explaining the gray areas on volatage injection in finding short caps (dead short) Thanks
this is my favorite channel from now own.. very specific. good job for that
Your space makes my space look tidy. I pointed it out to my wife to show her that’s how tech spaces just end up looking. 😂
Love your methodical and analytical approach to diagnosing, troubleshooting and fixing a short circuit. This video is packed with nuggets of good and safe practice. Thank you!
Excellent lesson! Thank you and cheers from Turkey :)
This is gold for who is new in fixing boards. Cheers mate
Love this channel! I've learned so much from you and would like to thank you very much for putting the ti e and effort into teaching us 👌
totally respect you!!! so clear and strait explained, probably the only video ever who made so well! you are legend man
Finally learning what voltage injection's definition is.
Nice and well described! Your video's have gotten a lot better.
Thanks for sharing your knowledge... Greatings from Portugal 🇵🇹 🌟
Very well explained. Between you and Sorin (if you know, you know) I'm going to learn lots from you.
Great video and very well explained! Thank you!
Just watched this video, I do electronics and repair many laptops and I see so many videos of rubbish fixing laptops,PS5,Xbox,Tv, etc and I got to say this is one of the first videos I seen where this guy knows what he is doing and talking about. I give this a full thumbs up and should be more of this. Be careful people because there is so much rubbish on you tube and if you know nothing about electronics then don’t even try to fix anything, go on a electronics course. I been fixing electronics for over 30years and there is always new things to learn. Anyway love your video and fantastic work my friend.
A lot of TH-camrs including myself kinda learned as they went, making videos while they were figuring stuff out. I'm trying to correct my old works now. This video and other ones I have planned I'm running past a couple of veterans on the repair scene and saying "You have the knowledge, I have the audience - is this accurate? is this portraying the information that you guys want people to be learning?"
@@Adamant_IT 2 veterans of a thousand battles as technical support behind you? It had taken a long time young Graham... excellent decision. That will increase your subscribers. All the best.
Brilliant video my friend! I have watched this a couple times now and will review when needed. As you clearly explain the particulars. Thank you so much for this helpful. I like your teaching methods. More troubleshooting! Love it! Cheers Mate! from a friend in Surrey BC Canada.
Just subscribed. I’ve been in this field for a couple years and I’m just getting into more advanced motherboard repair than basic soldering and this will probably help me out a lot. Thank you so much, looking forward to watching more of your videos.
Great video Graham. Definitely cleared up a few things for me.
This is definetely one of my favorite video. Very well explained. Very useful! Thank you for sharing. Exactly Correct as you mentioned. ❤
Wow is this a really great video. Now i understand what a short to ground is en when it is right to insert voltage. Chapeaux 👍
Thank you Graham, a thoroughly enjoyable and educational experience. I've watched dozens of professional repair videos and yours has been the only one to provide very necessary learnings,😇 before I blow-up something by being too gung-ho.
Thankyou, finally sombody explains it properly step-by-step.
Thank you, I was not even trying to learn anything tonight. I learned a lot which will help if i ever get to the point or desperate enough or I get that new thermo camera and a screwdriver . You made a nice video, I watched it straight through enjoyed every minute
Great video, for those of us who actually understand the basics this was very well explained to get to the next steps 👍
Great great explanation, seriously! Tech teacher quality! I've been watching many electronic repair videos in the past 6 months and I gained a bunch of valuable information and I have a lot of electronics knowledge myself. Thank you
Thanks a lot for your knowledge sharing. A lot of fix videos don't explain how to do a diagnostic but only to fix a common issue on a device.
Thanks a lot for all yours videos.
Best regards, Nicolas
We need more teachers like you. Keep up the video's. They are greatly appreciated. Thank you
All my questions answered in this masterpiece. Thanks a lot.
Very well explained and incredibly helpful. Your are one the best teacher, I have seen ever....
Semplicemente MAGNIFICO! Hai fatto un video di cui avevo bisogno e che in Italia non fanno perché pensano che tutti sappiano.Bravo bravo bravo!
I work with sigma in-circuit test machines daily testing many different pcbs (which I know would be a very expensive way of doing what you do) but you have explained this perfectly. Nicely done and a really informative.
This is what I’ve been looking for how, when and where to inject 👍 you’ve explain it clearly
This is really a great tutorial.
Thanks Graham i really appreciate
Thanks Graham, very good video.
In the 70s we called it the Indian method when troubleshooting radio and television. We checked where the smoke was coming from. 😉
Can't recommend it today. A bit too expensive.
Thanks for all the videos you share. 🙂
actually all electronics is running on smoke. when the smoke escapes it stops working :)
man I am so thankful for your superb advice. My Alienware 17 experienced this failure and I was able find the problem myself thanks to you. Love your work. Thankyou so much 🙏
Important video. I'm glad I stumbled across it. Subscribed.
This is the ONLY component diagnosing video that clearly explains what a short is and how to find one properly on a laptop motherboard. I'm not sure if you knew that, but this is a great video!
Outstanding video!! Learned a lot.
Very good video. Thank you for not talking so fast! It means that those of us who are not very good at English can follow you.
Thank you!!
One of the best educational video's I have ever seen.
Fantastic Graham thanks for sharing your vast knowledge 🦘
Great video. Really good explanations on the do's and don'ts. You have a new subscriber. 😊
Great video. Good to see you demonstrate the difference between mainrail and VRM resistances.
If you ever get fed up with your thermal cam, try the Guide IR PC210 with a macro lens. It doesn't just see a faint glow of heath in a certain area, it sees the component being hot. And that for a fraction of the cost of a Flir.
Top marks, must also know resistance from leads on multi meter before even starting. I understand low resistance and will beep but will not show dead short. Best explanation on this subject.
What a great tutorial. Excellent, thanks.
Fantastic video. Thank you so much.
Awesome video. Clearly explained
Thank you so much, I love your videos!
It was an amazing lesson! thank you!
Thank You Bro, this was a very informative video
Brilliant. Great video.
I didn't even know what voltage injection was. Thank you for the interesting video.
Very well explained, m8! You certainly have the quality of a teacher. You should definitely pursue this career my friend! 10 stars from me.
Reading in Diode mode is helpful and sometimes gives you more info, especially if you check junctions.
Great work 👌👍
Thanks for sharing graham. as always☺
Wow, thanks for the great tutorial 👍
THANKS FOR THE VIDEO. I LEARNT A LOT.
Amazing great job. Thank you.
Now, that was a useful and informative video.
Good stuff Graham! 🍻
what an EXCELLENT job!
thank you it was very very very helpful on every level
Done watching, thank you very much for the detailed troubleshooting procedure. I have learned significantly more troubleshooting & repair lessons in this tutorial video and to your other repair videos as well compared to my ENTIRE 4 YEARS OF COLLEGE EDUCATION. I hope you will soon have a mini-series for Schematic & Boardview-free Voltage/Power Rail Tracing[12V/18-20V Main Voltage Rail, 5V, 3.3V, CPU/GPU Core Voltage Rail, DRAM Voltage Rail, IGPU Voltage Rail, System Agent/Northbridge Voltage Rail, PCH Voltage Rail, BIOS Voltage Rail, Battery Power Rail], Proper method of testing/checking of potentially faulty MOSFETs & ICs/Controller Chips, CPU/GPU/PCH Reballing and BIOS Bin File Editing.
Thank you for the video.. very informative
excellent teaching tutorial!
one of your best inform vids
Nice tutorial, it will certainly help some people.
(24:16 - 25:10) That's what I get for rejoicing in advance: I thought you had fixed the previous MoBo (LFC348) and I even watched each video twice to convince myself😟😔.
However, thank you very much for sharing your knowledge, your experience and above all for your effort and mainly your time invested in the elaboration of this type of content exposed in a simple, clear and understandable way for many (novices and advanced) that reinforces our knowledge about this important topic. A sincere, affectionate greeting from Mexico.
love your videos. thank you!
Great Video. love it. nice explanation