Howto repair switch mode power supplies #1: basics, and block diagram of a PSU

I bought a Nox Urano II 630w atx power supply, but it never turns off, with the fan always running without being connected to any motherboard, I think the green Power On wire is short circuited with the black wires?
How can I solve this problem ?

please be precise, short and to the point.

Very well explained, thanks !

Thankyouforexplainingwithsimplewordsandaveryeloquenttalkingthattomeitshouldbethewaypeopleintheenglishspeakingworldshouldtalkfromnowon.

Great video thank you very informative 🎉

❤❤❤ good explaining about how this works

The first few presentations may seem slow and laborious. But stick with it. It comes together at about the fourth or fifth video. Don’t skip these beginning lectures.

Please share ppt of this video

Very good video!

great

I shorted my ender 3 3d printer power supply, when + and - touch the machine off, then i remove the short and its on again, but now the voltage only 19v, its supposed to be 24v, can you point me what is wrong with my psu?

Good one there!!!

Excuse me Sir is NTC polarized or Non?

Thanks you sharing, very impactful knowledge

Donkey reading electronic articel seems like expert one but I think not Donkey😀

Why are there no subtitles in the videos?

Thanks!

Good video

thank you so muchhhhh

Yes. Very complete and basic instruction. All thumbs up for an excellent thorough job. Thank you so much. I look forward to more of your videos.

This is the approach I've been needing and trying to find online without luck until now. You make great videos and explain wonderfully, thank you for this!

Excellent video!

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Fantastic Content! well done!

many thanks !

are u hungarian?

wow ..you explanation is wonderful

Terrific....keep it up, Thanks v much.

are you know what you saying????

Excellent

🌺🌹🌺🙏

Great video, loved it, one question though: Iz there eni kvestcsön? Köszi

I have a power supply that input volt 110 to 240 and out put 14dc, the problem is it working in 110AC BUT NOT WORKING IN 240, Please help me to find out the problem

Wow great video thank you

Part of these these power supplies is directly connected to line, so there are floating high voltages that could be dangerous to manipulate, especially in places with 220 volts. Even unconnected because of the charge of some capacitors.

Excellent presentation ""despite"" or maybe thanks to not using unnecessarily complicated diagrams and animations.
Thanks for sharing Your knowledge :)
Best regards

What a great Video. Thank you.

I subscribed yr channel pls keep upload new video

Sir can pulse be sent to igbt gate by only two transistors (8550 and bc 548b) in smps ( without microcontroller or pwm ic) if yes then how?

Super sir

Hi bro, please do a video on this topic or please farward some information,What can cause a power supply voltage to exceeds it's settings And how to find the cause and rectify the problem.🙂

Thank you very much my friend. I'm trying to learn about power supplies and you saved me! Thank you very much for your video class! Congratulations from your Brazilian friend!!!! 🇧🇷🇧🇷🙏🙏🙏😁😁😁

Nagyon jo video,koszonom szepen!!!

saludos muy interesante la funcion de cada parte de la fuente conmutada..

Great video! Very well explained which made it easy to understand. Thank you!

Jaj, baszam, de nehez halgatni eszt!

very nice, clear