Dell 15r No Power, Charger Turns Off - LFC
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- Опубліковано 16 гру 2021
- Board repair time! Spoilers down below. Sorry about the clipping audio again, mic has been adjusted for future videos!
Shorted capacitor on Battery Charger, found with power injection and replaced.
Funnily enough, I worked on this model of motherboard four years ago when I first started learning board repair (LFC#112), and it was exactly the same capacitor. Back then, I found it through trial and error, this time, I've got the equipment and knowledge to pinpoint the fault.
Aneng AN8008 Multimeter - This guy is a little high in price atm, but that's kinda the state of the world right now :(
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Mate, don't be afraid of making long videos like this one.. the amount of information per minute you share is unbelievable... Just the "V, I, A" clarification is something I (not native english speaker) have been struggling to understand since forever (not sure why it's not pronounced via). Amazing stuff! Keep up the good work, cheers!
Maybe you already know this but you didn't make a point of it. For those not old enough to remember, the meaning of "B Plus" comes from the era when electronics used thermionic valves, which have cathodes that need heating to emit electrons. Circuitry would require two batteries, the "A" battery to power the heaters or filaments in the valves (usually a lead/acid accumulator like one or more of the cells in a modern car battery) and the "B" battery to provide the HT or High Tension supply (typically 120V or more) that would power the main circuitry and do the actual amplifying. Even after the advent of transistors which don't have heaters and so don't require an "A" battery, the main power supply is still often called the "B" supply. It's history, or tradition, or something.
Thanks for the clarification.
Interesting!
Greetings. Interesting. I have studied electronics. However, I honestly didn't know that. I came into electronics when vacuum tubes were almost completely phased out. I did not have anything to do with with vacuum equipment. It was always B+ and or VCC for me. Thanks for sharing. That information does not help in fixing anything, but it helps for conversation.
I am glad i found your channel mr Graham, you are such a cool dude who really wants people to learn, which is awesome! I love to fix stuff, and i am happy that you are a good teacher! Never stop doing this! Stay safe Mr!
This is one of those rare UA-cam channels where I go back and rewatch old videos just for the fun of it.
Awesome! Thanks for taking the time for a thorough explanation and going through the logic as well as showing it on the diagram. One more option to find hot spots that I like is the upside down can of compressed air to put a layer of frost on the suspected parts. Apply a bit of current and the frost melts off.
I too was wondering why it booted but then remembered that it was the onboard 32GB ssd that was a feature of the Intel Rapid Storage Technology (RST) designed for the times. When the RST drivers were installed, it'd use the onboard ssd as a cache. In this case, it seemed to have stored the boot manager. It likely then crashed on handover to the OS.
this is why i subscribe to your channel. i bet you can fix this laptop less than 20minutes.... but you took the time to explain to us what your actually doing and how you go on about it. very nice job👍🏻
Just gonna leave a comment, fixed my dead laptop thanks to this tutorial. Could imagine going to a service center and they'll call it a dead motherboard and have me replacement. Worth a burnt finger for this, hail the touchy feely method
Thank god you know how to explain stuff like I'm 5 yo. I feel like I'm learning soo much stuff every minute of your videos, and I like your methodical approach of error finding. Please keep it up :)
You are like a regular laptop Louis Rossmann with cheaper tools, great job mate.
Great video! Thanks for all the detail, I'm really learning a lot from watching you!
Amazing work man, learning from you every single video I watch. You said you are no the best...I known people that say they are the best and man...they don´t even come close to the sheer volume of knowledge and expertise I get from you in the vids. Thanks again and keep it up.
I have a Lenovo laptop with the same problem.. after seeing your video tried to fix the laptop...on the second attempt i fixed the laptop...the way you teach is amazing...Thank you..
Well done repair video. I'm very impressed with your style of teaching, and methodical diagnostics. I'll be back for more videos.
I give lectures as part of my job and I have to commend you on your teaching skills. Outstanding.
I love your commitment to explaining things in a understandable way. I've said it before and I'll say it again; I've been into pc-hardware since I was 14 decades ago and with your video's I've gotten deeper into things and got the convidence to actually fix my HDD and recover my data (yes I didnt backup :P), by getting a donor board and understanding what I saw and having the bios chip transplanted and have it just work again.
Keep up the good work
Been very educational watching your videos. You do a great job of explaining your every move through the evaluation process. I am in the beginning phases of tackling several non-functioning laptop motherboards. Thanks for a great channel.
Excellent job! I'm absolutely passionate with your LFC videos. Kudos to you!
Props on the video. I've already fixed my Dell Inspiron 15r SE 7520 with the help of your previous videos. Thanks!
Just fantastic. Thank you for sharing your knowledge and the step by step approach to fault diagnosis. Very generous use of your time. Have a great Christmas break..
glad i found your channel mr Graham, you are such a cool dude who really wants people to learn making long videos like this one is actually very helpful for us here. ones again thank you.
The quality of your videos continues to improve. This is a very good video for the standard shorted cap fix, well explained and short enough (in time) to be digestible. Well done.
This video is pure gold, particularly 08:00: multimeter on Gnd and the current sense resistor "We've got a short in B+ or main power rail, which tends to be fixable. (...) Resistance is 0 ohms which means a dead short circuit; 1 or 3 ohms would mean via the PCH, or the CPU, or the GPU."
What a pleasure to watch your videos. The amount of valuable information that I've gained is truly remarkable. Great teacher and even greater tech. Thanks a mill
As always brilliant and very clear explanation. Truly enjoy watching your videos and learning as you explain. Fantastic....
Thank you for your tutorial and taking your time to share your knowledge. I’m learning so much.
the detail you go into makes you my fav repair guy to watch along with Rossman. Huge respect dude keep it up
Thank you so much for the training - this is what we need someone who explains step by step - thank you again - and Happy new Year 💯
Thank you so much! Really grateful for this video and the time you took to explain. Much appreciated!
i was able to really understand the search for the bad part and the repair -- THANK YOU Graham
Thanks Adam! very good demonstration and teaching is so good for newbies.
I think they way you talk through every step, explaining as you go like it's the first video you ever made, is actually very useful. It might be seen as being regurgitating information already known (from other videos), but the repetition is actually useful for banking the information in to memory. Well done on your channel, you're doing a really great job.
I enjoy so much your videos, I am learning from your explanations, you made the learning experience really interesting, I love it!
getting above and beyond explaining things, kudos man!
Another excellent tutorial video, methodical and each step explained clearly and easy to understand learnt so much from this and your other videos, keep up the good work
You really good , and a good teacher in same time !!! Top man!!
Very nice repair. I've watched several of your videos and they are excellent!. Thanks
This is an exceptional video for learning the basics, really well done. Thank you.
thank you Adam! for sharing your time and knowledge! big LIKE!
Brilliant content, your explanations are top notch. Thank you!
Fantastic job and elaboration! Thank you so much! I 've learnt a lot from your videos!
Abdolutelt brilliant,faultfinding demo,graham,superbly clear,concise,methodical,and superb videoing,superb sir,very well done.,please keep up the exellent videis sur.
I watch your all vids, Love it Brother. Nice Description and approach. Understandable.
Been following you for quite some time now :) hello from Malta. I do the same work as you, much less board repairs, more IT focused. Keep doing what you're doing, enjoy it, ignore stupid comments, and you're my idol!
It might be worth your time to make up a custom set of voltage-injection cables for diagnostics. The end of the ground wire would be a ring terminal which can be bolted on to a ground hole on the board with a nut and bolt rather than having to solder the wire on to the PCB and then desolder it later and clean it up once you start reassembling the machine.
I have used a thermocouple probe connected to a digital thermometer to identify hot components in crowded PCBs in the past, it saves on burned fingers and it's less messy than alcohol or other workarounds. Some quite low-cost multimeters accept K-type thermocouples (the yellow two-pin connectors) and will do temperature measurements but the individual thermometers are cheap enough from the Usual Suspects (I think mine cost me less than a tenner including a thermocouple).
This is a very informational video. Thanks for the effort!
Hi there , just i wanted to say thankyou for your tutorial video , your explanation was very simple & easy to understanding, i learned a lots of things from your video .it is very good that you explain step by step . thankyou to spend your time for us , keep it up .
i enjoy watching your channel, I find it educational and interesting, I learned a lot. Thank you for sharing your knowledge and the right approach to troubleshooting and repairing of laptops. More power to your channel
Nice video man, a lot of details and explained down to the root of the issue.
i never get it wrong when i follow your teachings thank you once again
Great video thanks for all the great content you put out.
I, for 1, just want to say thnx and keep up the great content!! You've got me looking into starting an electronics business!! Lol. It all just looks soooo interesting and rewarding!!
Thank God I've found you! Brilliant!
Very nice explained,the cap is cracked as you mentioned...Thank you for another nice video!
Very informative and clear. Please do more videos like this. God bless
I like the reasoning behind a longer than normal vid, maybe a "teaching" series. Tbf I just enjoy the content for entertainment with occasional pearls of wisdom & maybe as in videos before, a shorter version of the same vid. I do however, appreciate that this idea would take up a lot of extra time and energy. That thermal imager is a god send.
Really enjoyed the schematic explanation, more please :)
With explanations like these, i think i might try to repair a samsung laptop that is in the corner, doesn't charge or power up, already tried to find schematincs and was not able to, so with this kind of detailed videos i think will be easier to find the problem and understand how it works.
Keep up with the good work
A great knowledge ! very impressive...thank you from France !
Thanks for sharing that golden knowledge! 👍👌🙂
Thank you man. Nice info! Good luck.
Wow you are really amazing i love watching your videos it gives me a clear knowledge about laptop maintenance thank you very much really appricaite you!
Graham, excellent video!
I have a Dell Latitude E5450 with the same issue. I'd love to be able to fault find it as you have done, but I don't have the time just yet. I'll keep it on the back burner for now as I've yet to purchase a hot air station and some spare SMD components.
Thanks for a very excellent and methodical tutorial.
it is very good and easy to understand , your explanation is awesome anyone can understand . your tutorial videos are different with another videos !!! you explain easy and step by step. it is Absolutely for beginners. please upload more like this video . thnx
Thank You for the video regardless it long or short.
Very intuitive,I enjoyed it,thanks
Happy to find good teacher.
I have that same multimeter,and i think its great. And came with lots of acessories
I prefer your longer videos pal keep em coming 🙂 very informative as ever 👍
like watching your fix it videos gives me so much information so much so they helped me fix a broken amazon tablet 👍
Thank you for showing us !!!!
love the jumper you got on good vid as all ways thanks :)
Nicely repaired.
Commenting to help with the algorithm. Great video as always, Graham!
Great teaching video and it's free!! Thanks!!
I can learn a lot from your video.....very nice sir.
Thank you for sharing this video.
You are a great teacher ❤❤
Thank you for your amazing content. Big big fan
"The long way is the safest way" US Army Corps, Escape & Evade training 101 😂
Thanks for the informative video
Thanks graham for making this video
My first attempt at board level faultfinding advice (for those of you that understand) is to check Voltages and capacitors... There are "in circuit" capacitor testers available that are amazing (with a small learning curve)... From my experience of repairing other peoples PC's, if its not a windows thing- its most likely a capacitor LOL (i suppose i could throw in hard drive/ memory somewhere in here too- BUT thats for u guys to work out)
Very clear thank you for your explanation ❤
Good job. Thanks for sharing
When you said 'maximum airflow' I was hoping you'd say maximum effort 🤣 new to your channel mate very good stuff 👍 I'm gonna be building my very first pc soon 😬 I've always got the parts and asked somebody else to build for me because of how expensive parts are you know! I've left it pretty late in life to have a go at 36 😅
very nice ser, learned a lot..thank you
I prefer these long videos. Great job
I get good information about repairing techinis of laptop .Thanks brother
great job sir, thank you
RIP to that Samsung HDD used as soldering desk! thx for the vid
Thanks for the video!
Thanks for your insights.
Amazing Video, Thank you so much!!!!
Great work.
Nice job again 🙂
Great teacher !!
You are the best adamant
Thank you very much indeed that was awesome