Dead Micro ATX MATX Power Supply - No Power

Dead Micro ATX MATX Power Supply - No Power - Can We Fix It?

Рет қаралды 22,059

Жыл бұрын

I was trying to fix an All in One PC and the PSU was completely dead. So I replaced it with a new one and now I have the old one. So what is the best thing to do with it? Send it to the landfill or try to fix it instead?
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Richard

Пікірлер: 128

@davematthews414 Жыл бұрын

Some things are completely obvious unless you are unfamiliar, and just hearing you work through this and say "if it reads higher than it should, then it suggests there is a problem with the resistor" really worked for me, and I thank you. Some may laugh at that statement, but I really appreciate the way you just talk your way through these videos (with added text comments wherever needed!) and let us hear your thought processes as you explain how you expect a circuit to work vs what you find as you probe with the meter. I'm not sure you can appreciate how helpful your videos are in enabling people to understand and repair all kinds of electronic equipment, but I certainly appreciate your work and wish you the best for 2023.

@bjornroesbeke Жыл бұрын

The only cost to save this PSU from becoming e-waste was a € 0,01 resistor and one hour of work. Imagine how many poor electronic devices could've been spared from eternal doom if someone cared to have a look at their internals. I enjoyed the clear explanation of how these kind of PSU's work. They don't come with a schematic in the box, unfortunately.

@frankreiserm.s.8039 Жыл бұрын

You are the best teacher of all of the electronics repair technicians who make videos. Frank Frank Reiser Video/Audio Service

@davesdigitaldomain Жыл бұрын

thank you very much Richard this is the content we love, your explanation was excellent and I learnt a lot. I hope to see more ATX power supplies, graphics cards, motherboards, laptops repairs. Etc in the future. Have you considered doing some game console repairs as they do seem to draw a large audience.. Even if you are not familiar or experienced in repairing these you could do trying to fix consoles repairs which I think would be very interesting and entertaining. All the best for the future with your KZfaq channel.it's my number one channel.

@LearnElectronicsRepair Жыл бұрын

OK I will keep that in mind, after all it's all just electronics... yeah?

@johnheaton6705 Жыл бұрын

@@LearnElectronicsRepair Yeah it is, you do spot a few car booty ones so it's something I'd like to see too, PS1 PSU, XBOX everything, N64 PSU, I bet there's some interesting things you can bring home, fix and flip on fleabay using the same methods you value your PC bits.

@bariscosmaz Жыл бұрын

Thanks to the circuit that you have drawn in this video, I was able to fix a 700 watt Thermaltake PSU. It is like you have created a library or an encyclopedia with this channel. Richard, you should publish a book with those circuits that you are drawing in your videos. I would absolutely buy it :D Great work as always, thank you for your help.

@blackterminal 5 ай бұрын

Good job. I love to see electronics saved from e waste.

@darrenbird2526 3 ай бұрын

Another great fix and a great instructional video. I think these are the best electronic tutorials on KZfaq. Thank you for the time you put into making them. Cheers

@jmac213stuff Жыл бұрын

Love how your drew out that typical circuit on paper and then used the knowledge go back to the circuit and explain what to look for and how it all works. almost like SMPS in a nutshell. Really got a lot out of this, thanks. Two thumbs up.

@theforthdoctor7872 Жыл бұрын

Another master class. Outstanding

@lilianapatru5933 23 күн бұрын

Hi. I am so pleased about the protection bulb that you used :) I am using it too, it saved me so many times, I could not count...

@romancharak3675 Жыл бұрын

What a great way to start the New Year! With more knowledge.

@bme-uk Жыл бұрын

Happy New Year, best of luck for 2023 from the 🇬🇧

@icmann4296 Ай бұрын

Great video. It was very informative. I only wish you had included video on the replacement of the resistor.

@binarybox.binarybox Жыл бұрын

Well explained, Richard , and a Happy New Year.

@ajw6715 Жыл бұрын

Very good! Happy New year to you also!

@davidc6459 Жыл бұрын

Happy New year, great video.

@eamonhannon1103 Жыл бұрын

Nice analysis and repair . Happy New Year !

@jrmiller034 Жыл бұрын

Happy New Year! Great Video again. Thanks

@litzonemcneil-spence791 Жыл бұрын

Hi This is Stargate Electronics herein Uitenhage in the Eastern Cape in South Africa. Sorry for adding this info only now

@p4spooky Жыл бұрын

Learnt something and very nicely explained along with systematic trouble shooting. Excellent.

@Meancat3 Жыл бұрын

Thank you my friend! Very informative. Happy New Year mate!

@wherami Жыл бұрын

glad to see you talk about the safety concerns. very good.

@LearnElectronicsRepair Жыл бұрын

Yeah, if subscribers keep watching videos I get some income from the advertising they watch so I figured it's a good idea to keep them alive 🤑 That was a joke by the way, before anyone starts chewing my ear 🤐

@wherami Жыл бұрын

@@LearnElectronicsRepair lol.

@antoniorivera7337 Жыл бұрын

Thank you for sharing your knowledge! And happy New Year to everyone!

@geoffedwards189 Жыл бұрын

Thanks once again Richard. Best wishes for the New Year.

@maksberlec4832 Жыл бұрын

Happy new year to you too, Richard!

@peteunwin9663 Жыл бұрын

Happy New Year to you Rich.

@timstanford3443 Жыл бұрын

Thanks for the awesome video Richard! Happy new year from 🇺🇸

@englishrupe01 Жыл бұрын

Great explanations and troubleshooting, thanks Richard, and a very happy New Year to you too.

@markkalembelembe323 Жыл бұрын

Happy New year great teacher. Step by step explanation.

@johngregory1803 Жыл бұрын

Happy New Year Richard. Another super video and brilliantly explained.

@stevex3976 Жыл бұрын

Happy New Years to you also.

@daz41262010 Жыл бұрын

fantastic explanation Richard :) happy new year to you :)

@zarzarel1910 Жыл бұрын

Thank you, professor, and "Happy New Year" for 2023

@TheDurdane Жыл бұрын

Great lesson, thanks!

@tonyedwards5782 Жыл бұрын

Great explanation thanks for taking the time to explain why the different components are used and what to expect when testing. Happy New year

@smig72 Жыл бұрын

Many thanks for all your video’s and explanations Richard and a very happy new year to you and your family 👍👍

@jkboyett2 Жыл бұрын

Thank you for the video and Happy New Year! Keep up the good work on these very informative videos.

@shagreobe Жыл бұрын

I really like how you explain things. Keep it up

@Ghost572 Жыл бұрын

Happy New Year to you also.

@bluethunder7814 Жыл бұрын

what a good repair thanks for the video happy new year

@MrPnew1 Жыл бұрын

Very nice walk through, explanation and repair of this PSU. HNY to you and your family too

@darkdepth1991 Жыл бұрын

Happy New Year Richard, watched the full recording. Learned allot from this video, I hope I can put this into practice one day !

@jozsefizsak Жыл бұрын

That's very satisfying. I wish I could say I'm now ready to fix a few of these but maybe someday!

@Xorat Жыл бұрын

Great video Richard! Directly knew where to search for and found the problem! I learned quiete something in this video!

@mr.gathuru828 8 ай бұрын

Thank you very much, I wish I had discovered your channel earlier, it has been a big blessing to me. Once again thank you very much and continue sharing your Wonderful knowledge on electronics

@r00t_sh3ll Жыл бұрын

This was amazing, Thank you so much for taking the time to make these video's.

@goober650NX Жыл бұрын

Just discovered your channel last night while searching for content to test and repair a digital ballast for a failed flourescent light in the garage. I understand very little of this but I love watching your diagnostic technique and find this type of stuff fascinating. I'm struggling with a printer power supply at the moment and also a car battery charger (digital type) out of lidl. 😄 Thanks for making the video and for taking the time to upload and I wish you a happy, healthy and prosperous new year.

@Stuff_And_Things_0 Жыл бұрын

Great video and explanation. Thanks!

@avi4828 Жыл бұрын

You are blessed with so much knowledge and experience. You are fantastic teacher!

@it-sd Жыл бұрын

Happy New Year!

@markbaker594 Жыл бұрын

Richard, here's another thought: if you have spillages on any of the motherboards use a bottle with 80% filled with isopropyl alchol and 20% water, why because most spillages appear to be water soluable. Then use a toothbrush to clean it off, better still use a motorized one. Also you could use what is called a flux & boil routine, where you use flux and your heatgun! (I pick my ideas from elsewhere, to help you out.)

@johnmarchington3146 Жыл бұрын

Many thanks for an excellent video. I thoroughly enjoyed your explanation throughout and I've now subscribed to your channel.

@khx73 Жыл бұрын

Nice one Richard! I was expecting the usual power device failure.

@bhok5228 Жыл бұрын

Wow, great content, nice to learn form a very experienced guy, thank you very much

@johnheaton6705 Жыл бұрын

Great video Richard, I always learn something new - happy new year to you and your wife, all the best from Bradford UK.

@alanbenson1505 Жыл бұрын

Great video, Richard.

@ruudb72 Жыл бұрын

Wow! Very nicely explained. Thanks!

@peterbaldwin6573 2 ай бұрын

Great channel 👍

@Radek__ Жыл бұрын

thank you. That was nice peace of knowledge.

@tomluque Жыл бұрын

Wonderful theory of operation is very helpful for troubleshooting. Thank you.

@BoB4jjjjs Жыл бұрын

Nicely done and explained, you also covered the fact that a circuit is not always true to how you would expect it to be.

@RickL_was_here Жыл бұрын

Happy New Year 🎆

@cinkoxid Жыл бұрын

Very nice fault finding. I have a few faulty PSU-s as well...maybe I'll check them again with your methods. Thanks for the videos.

@jdshenanigans9265 Жыл бұрын

Happy new year from devon uk

@andymouse Жыл бұрын

This should be required reading......cheers and Happy New Year !

@uquarosh Жыл бұрын

Thanks for a very informative video on an interesting subject. With no advertising. Hint. Keep up the good work and all the best for 2023 to you too.

@LearnElectronicsRepair Жыл бұрын

Glad you enjoyed it. The amount of advertising you see is nothing to do with me, this video has exactly the same monetization settings as all the other ones.

@uquarosh Жыл бұрын

@@LearnElectronicsRepair I wasn't referring to KZfaq advertising. These are filtered out by the casting plugin. The sponsors like "PCway" etc tend to detract from the true subject of "Electronics Repair". This is not a complaint. Just an observation.

@jkkba Жыл бұрын

Happy new year

@Dutch_off_grid_homesteading Жыл бұрын

Heya, yes 1 more good explained repair video learning every vlog

@louchitchat Жыл бұрын

thank you very much, it was very informative

@VLPAB Жыл бұрын

Thanks, great video !

@stevedebeukelaer1424 Жыл бұрын

Hi Richard nice fix

@METHIERO Жыл бұрын

Thank you!

@CliveTrezona Жыл бұрын

Very interesting. Thank you.

@jamesgrant5945 Жыл бұрын

Absolutely brilliant

@juanfethi Жыл бұрын

Exellent tutorial ,I have the same problem with ATX power .sply and this is an idea to start the repair thank's mASTER

@salageansorin Жыл бұрын

Thanks for your post.

@craigcousins6718 Жыл бұрын

Happy new year richard love the videos! By the way did you ever fix that powered mixing desk? Waiting for a part...... I dunno 10? Lol

@tonyquinn3941 Жыл бұрын

Thank you HNY👍

@edwinwaugh Жыл бұрын

Great watch. Still non the wiser (my fault) great to see you fixing it. Well-done.

@LearnElectronicsRepair Жыл бұрын

Just stick around here and one day you will have a 'light bulb' moment in your head and everything will all come together and make sense

@temyraverdana6421 Жыл бұрын

Thanks a loto, great lesson

@nonsuch Жыл бұрын

Nice work. 🥂

@shai1985 Жыл бұрын

Thanks for sharing🙏

@Dicofole Жыл бұрын

Thank you so much for sharing all this knowledge, I have so much since subscribing to your channel. What usually causes a resistor to fail ?

@baghdadiabdellatif1581 Жыл бұрын

Thank you very much

@wybuchowyukomendant Жыл бұрын

This is brilliant

@sagebrushrepair Жыл бұрын

I'm actually learning so much from you. I love this video, you are a Wonderful teacher. PSUs are low value devices, but a high carbon footprint. Would you recommend a repaired power supply over a new power supply? Would you recommend a repaired power supply to a hospital? I likely would given the chance to choose higher quality components. What are your thoughts if you have a second.

@marcellipovsky8222 Жыл бұрын

Thanks Richard, I have a computer with a non standard PSU and this might help me with the fix. I haven't expected a resistor being a culprit. That was a surprice for me. Please find another one to fix so we can see a different kind of PSU not working problem. 😍😍😍 THANKS! And a happy new year!

@LearnElectronicsRepair Жыл бұрын

Hi Marcel, I've made a lot of PSU repair videos on the channel - check out the playlist kzfaq.info/sun/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi I also have another new PSU repair video to publish tomorrow 😉

@marcellipovsky8222 Жыл бұрын

@@LearnElectronicsRepair Thanks Richard, I still have a lot of videos from your collection in the queue. This one was very interesting mainly because it explains the basics of the PSU's inner workings. Till now I avoided the 320V stuff coz safety, but now I am warming up to it. ⚡⚡⚡

@fabrice934 Жыл бұрын

Hello from france. Happy new year to all. Thank you for the vidéo, your explanations are excellent, my english isn't very well but i undestood everything ;-) Could you explain more psu basics?

@LearnElectronicsRepair Жыл бұрын

I've made a lot of PSU repair tutorials - here is the playlist, and enjoy kzfaq.info/sun/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi

@dedr4m Жыл бұрын

Worth noting my own experience of being shocked by the bulk capacitor on the mains side, on one case, I embedded one of those power-brick style PSUs into the workshop wall from how hard I threw it... No thought, just felt pain in my hand where my hand completed the circuit, the next second I see the PSU sticking out of the wall where the heat-sink went in by just under 1cm (prob 5 or 6 mm). Of course, I've had many other electric-shock incidents including building a DIY battery pack and backlight CCFL circuits, etc... Not fun to mess with. Some helpful tips (albeit not the best advice): ATX PSUs typically need full rail mains voltage (90v to 250V AC, 80V to 300V DC) to start switching, though I did have an exception with one that started (Chirped) at 60V, It seems about 40% of the power-brick (Laptop PSUs, typically the 90W or less ones) on average will start up and stay running at full load below 30V, though don't keep the load on it too long, in 4 of the cases I did this, the windings being too anemic on the mains side would overheat and short causing the FET to fry, the other two cases were 5V 4A and 5v 6A bricks that the PFC windings got hot but if I inject 30V into the bulk capacitor, seems to run cool enough at full load. Don't ever try to run an iron-core 60HZ transformer on DC..... Should be obvious why, but I'll say it in case someone didn't know. The lowest I got a Lenovo 90W power supply to start up on was 25V and the point it stopped switching was at a little over 5V. The 120W and above typically need at least 60V or more. Worth knowing if the PSU has screws holding it together and one wishes to use safer voltages to work on them, but worth knowing it's not always the case and that you'll be stressing components (ie. too much current in the primary of the transformer). Edit: Clarification and forgot the number-unit for wattage.

@andrewgjkgjk 5 ай бұрын

It would be helpful if instead of waving around in the general area with the probe leads, you placed the probes on a given lead or pin and clearly stated what it is you are pointing at, particularly after flipping boards over.

@followthetrawler 3 ай бұрын

I could watch you repair SMPS all day :)

@user-qp5xb2fd4w 11 ай бұрын

richard you do great job there , please make more videos about power supply, so we can learn more about faulty types , if there no short anyware could be resistor , good i didn't expect that , my power supply is FSP 850w gold Hydro G its very complicated it have 6 board inside and have 1450 ohm on green and black what you think its the problem thank you .

@soranblue 6 ай бұрын

Brilliant, can you provide schematic for your lightbulb circuit, I know it's basic stuff, but wanna see different implementation

@DCniner Жыл бұрын

Have an amplifier that went down during a brownout a few years back. It was powered on but not in use. I’ve checked all the obvious (fuses, caps, connections) but have no idea where to begin. Any vids of repairs to circuits taken out during a brownout?

@davidv1289 Жыл бұрын

Great technique for handling switch mode power supplies Richard. Complacency will kill you! Have you ever tried connecting the input of a SMPS to a low voltage DC supply for testing? Thank you for another interesting video. Regards, David

@LearnElectronicsRepair Жыл бұрын

I've sometimes used my bench supply to power the smps controller chip to see if it oscillates (with no AC input) and also sometimes used a transformer from an old amplifier, I think it was about 90V, to power a SMPS. I actually have an isolation transformer on my bench power socket - the one I use for the the device under test - and this also helps make things safer. Isolation transformers can be a bit hard/expensive to find, but most SMPS will work in the range 85V-240V I would recommend anyone living in a 240V region to get a used 110V site transformer - those yellow things that builders and similar tradesmen use - and power the SMPS from that while working on it. This makes it considerably safer. You can pick a high powered one up for about £25-£35 in the UK - these are actually sold prices on ebay www.ebay.co.uk/sch/i.html?_from=R40&_nkw=110v+transformer&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=ST3+4RP&_sargn=-1%26saslc%3D1&_salic=3&_sop=12&_dmd=1&_ipg=60&LH_Complete=1

@davidv1289 Жыл бұрын

@@LearnElectronicsRepair I was referring to actually connecting a DC bench supply to the AC input terminals and running the SMPS as a DC to DC converter. The main advantages are lower voltage on the high side and the "hot" ground can be grounded and then a grounded piece of gear such as an oscilloscope can be used for troubleshooting. Of course the SMPS must not have a load on it. I have used this technique when repairing bench type SMPS with regulation, intermittent operation and noise issues - probably not necessary for short circuits.

@sipansibabdreddknot5179 Жыл бұрын

hi can you elaborate or give schmatics on light bulb idea ? ive seen this on electronics repair for finding shorts but not knowing the schematics on how to create one thanks.

@orion310591RS Жыл бұрын

44:06 - I wanna ask something about power of resistors or diameter, since you found the fault, would it be better to use higher wattage resistors but the same resistance? Since that wattage obviously failed? I think its good to good to use higher wattage resistors.

@LearnElectronicsRepair Жыл бұрын

There is so little current flowing through 40 Mega ohms that even if the IC or capacitor was short it would cause almost no wattage. I think there is something about high value resistors in high voltage circuits that causes them to gradually go high resistance, because this is quite common in valve (vacuum tube) circuits which are also high voltage low current. I honestly don't know the physics of this problem, just how to diagnose it.

@orion310591RS Жыл бұрын

@@LearnElectronicsRepair I agree, but if we multiply working hours? How many years then months then working hours we get from PSU? Its natural that all components go crazy over some period.

@ddjazz Жыл бұрын

Great video , I have a question my pc starts there is the powerled and restarts after 1 second , i checked for shorts on the motherboard atx connector but all is good. What could be the problem? Sometimes 1 in 10 times it starts completely and keeps working.

@colin5064 Жыл бұрын

Hi, could you answer a question that is puzzling me? Normal calculation for circuit protection by fuse in plugs 3 pin as per UK standard. Would see a 3 amp fuse in an electrical appliance of 450 Watt.Ref 450 watts divided by 240 volts = 1.875 So why do l find my ATX PSU of 450 watt fitted with a 6 amp 20 mm quick acting glass fuse?