Computer Power Supply Repair – DEAD bad capacitor No / Flashing Green Light

Computer Power Supply Repair – DEAD bad capacitor No / Flashing Green Light

Good replacement power-supplies on amazon →
How to spot a bad power supply and how to fix it. This one has a Flashing / Blinking Green Light HP P/N. 5188-2622 BESTEC ATX-250-12zZ REV.:D6R
This is an exact replacement for mine→

Repair a dead computer.

Categories: Computer System

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  1. Bravo Six Going Dark
    Bravo Six Going Dark 25 November, 2021, 23:43

    wow you actually touch the capacitor D=

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  2. Rizvi Ahmed
    Rizvi Ahmed 25 November, 2021, 23:43

    Can you please tell me the name of the component that is wrapped in black heat shrink tube and connected in parallel to the big bulk capacitors as shown at 1:57. My one is completely blown so could not look for a part number.

    Reply this comment
  3. frizstyler
    frizstyler 25 November, 2021, 23:43

    you should wear nitrile gloves for the hand dryness

    Reply this comment
  4. Cube Computer Channel
    Cube Computer Channel 25 November, 2021, 23:43

    You can use down to a 6.3V capacitor to replace this particular capacitor. Usually, Bestec installs a 10V capacitor, but some revisions such as yours had the 16V part. This circuit carries 5V. I've reused 6.3V 2200uF parts from motherboards to replace that cap. It's that one and sometimes the nearby 220uF 25/35/50V capacitor that will cause these units to act up. Also, the caps over on the secondary tend to fail. The Bestec units tend to have capacitors from Jamicon, Teapo, or Capxon in them. The Jamicons usually last longer. I've recapped enough of these 250-12Z units to lose count. The one unit to avoid fixing altogether, is the 250-12E… this unit has a faulty 2-transistor design 5VSB controller that fails with time and takes out the motherboard. eMachines were notorious for these units burning up, sometimes violently.

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  5. dazz khan
    dazz khan 25 November, 2021, 23:43
  6. Retro Prime
    Retro Prime 25 November, 2021, 23:43

    Those solder balls are bigger than a set of hairy ones 😀

    Reply this comment
  7. Truth fears no scrutiny 123
    Truth fears no scrutiny 123 25 November, 2021, 23:43

    I have replaced obvious bad capacitors on like 5 different PSU and I never have any luck at all.

    Reply this comment
  8. Skywirefan
    Skywirefan 25 November, 2021, 23:43

    Its people like you on youtube that make this website great. Good video, man. I didnt even need this video but it was interesting and I learned, thank you.

    Reply this comment
  9. Nick DelVecchio
    Nick DelVecchio 25 November, 2021, 23:43


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  10. Anwar Shiekh
    Anwar Shiekh 25 November, 2021, 23:43

    Better to stick with 105C rating and not go down to 85C

    Reply this comment
  11. CrowdPleeza
    CrowdPleeza 25 November, 2021, 23:43

    My computer doesn't turn on after power outages until about 2 or 3 weeks later. Any ideas on what I could try replacing on the inside?

    This has happened with my computer about 3 times now. I have a Compaq Pressario. I tried replacing that battery and that wasn't the problem. Also when the green back light comes back on there's usually no problem with the computer until we get hit with another power outage with the computer on.

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  12. SevenDeMagnus
    SevenDeMagnus 25 November, 2021, 23:43

    Hi. Is there a fuse inside the HP power supply. It's LED isn't lighting at all. Any fix?
    Thank you.
    God bless, Proverbs 31

    Reply this comment
  13. FunGames
    FunGames 25 November, 2021, 23:43

    I have seen quite a few PSU videos and this is the most informative. This makes me wanna unsolder all the capacitors off my dead PSU to save them for later.

    Reply this comment
  14. john smith
    john smith 25 November, 2021, 23:43

    Ya next time you can subtract the solder by using a braided wire (and i would recommend resin flux NOT acid flux..) Otherwise good video…

    Reply this comment
  15. Apsara Aruna
    Apsara Aruna 25 November, 2021, 23:43

    how did you know exactly that capacitor not working?

    Reply this comment
  16. gtasa261
    gtasa261 25 November, 2021, 23:43

    My psu fan working 100% all the time any ideas; its a new corsair hx850i

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  17. Colin Maharaj
    Colin Maharaj 25 November, 2021, 23:43

    dog, your hands are really dry….

    Reply this comment
  18. Kesha Borja
    Kesha Borja 25 November, 2021, 23:43

    You need to make some changes. Check Avasva Solutions if you want to make it right.

    Reply this comment
  19. pk presents
    pk presents 25 November, 2021, 23:43


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  20. gajera gopal
    gajera gopal 25 November, 2021, 23:43

    sir, i have an dell t3500 working station and few days ago when i start the pc its gone turn off automatically in 2-5 seconeds so..plzz help how can i repair???????

    Reply this comment
  21. Jello
    Jello 25 November, 2021, 23:43

    FIXED MY DAD'S TOWER POWER SUPPLY and it is still going strong. Thank you very much, we saved a lot of money and hassle.

    Reply this comment
  22. Florian Iberhysaj
    Florian Iberhysaj 25 November, 2021, 23:43

    is it weird that i ripped out 2 broken capacitors outside of a dead xbox one s and got it working with a atx psu??? shouldnt SOMETHING happen? there were originally 3 capacitors but 2 of them were dead so i ripped them out and the console works completely fine with only one capacitor near the power plug near of the apu?

    Reply this comment
  23. Stefan Payne
    Stefan Payne 25 November, 2021, 23:43

    Voltage rating is important because it has to be filtered. But capacitance is not. A Capacitor has other parameters as well. Capacitance is just one of many!
    And CapXon KF is a so called "Low Impedance" series wich is made especially for higher frequency stuff. And there are no 85°C Types from any half way decent manufacturer that are Low ESR or Low Impedance. So replacing that with an "85°C" Cap means that replacing a good low Impedance type that is rated for 2000mA Ripple Current (or more) with some garbage that has half of that or less!!
    You can not replace different types of capacitors!! You have to replace a low ESR type with another Low ESR type, you can NOT replace those with General Purpose ones like its done here.

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  24. Felix
    Felix 25 November, 2021, 23:43

    Nice Video, but bad soldering Xd

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  25. BaccaClench
    BaccaClench 25 November, 2021, 23:43

    That looks so identical to mine!

    Reply this comment
  26. The Card Plug
    The Card Plug 25 November, 2021, 23:43

    My PC made a small explosion sound and I smelled smoke. I just don't remember exactly if it happened when I plugged in the the power cord to the wall outlet or if it was already connected and it happened after pressed the "on button" on the PC but I was something like that. Anyone have any idea what can be wrong?

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  27. Strategic Thinker
    Strategic Thinker 25 November, 2021, 23:43

    Put the solder on the tip and remove any excess before you then touch the connections.

    Reply this comment
  28. Sharif Sircar
    Sharif Sircar 25 November, 2021, 23:43

    Ah you're supposed to pull it out while it's heated, I was trying to remove the solder first and hoping it would fall off

    Reply this comment
  29. Adurite King
    Adurite King 25 November, 2021, 23:43

    how do u open up the whole pc and do an autopsy on it?

    Reply this comment
  30. Dhayani Melendez
    Dhayani Melendez 25 November, 2021, 23:43

    Where can I find the schematic of this power supply model?

    Reply this comment
  31. Tiny Goliath
    Tiny Goliath 25 November, 2021, 23:43

    can you use those aluminum solid state caps of same value? instead of electrolytic

    Reply this comment
  32. HVinduction
    HVinduction 25 November, 2021, 23:43

    You can't just replace capacitors. You also have to look at the temperature rating!

    Reply this comment
  33. Hawk
    Hawk 25 November, 2021, 23:43

    my psu making buzzing sound what could be the problem ? thanks

    Reply this comment
  34. MattMinimal
    MattMinimal 25 November, 2021, 23:43

    I replaced the wrong capacitor with the same one and it's still doing this flashing :/

    Reply this comment
  35. Rock Fenland
    Rock Fenland 25 November, 2021, 23:43

    Absolutely superb tutorial. My old compaq pc power supply had exactly the same fault and the same dead capacitor.made the replacement as directed and the pc is now working perfectly. I cleaned both fans while it was dismantled and it now runs quieter than ever. Can't thank you enough for your instruction. Pete.

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  36. knayle
    knayle 25 November, 2021, 23:43

    when I try to open my pc and fan spins but keyboard and mouse have no sign Also the monitor says no signal do you think it's my power supply?

    Reply this comment
  37. Learn Dodo
    Learn Dodo 25 November, 2021, 23:43

    pls can u tell the schema

    Reply this comment
  38. Bozidar
    Bozidar 25 November, 2021, 23:43

    throw away that bestec power supply its going to damage some other component

    Reply this comment
  39. Jalatto_
    Jalatto_ 25 November, 2021, 23:43

    While i was using my cpu, there was a mini explosion like a Pack sound and now my power button won't turn on. How do i fix this?

    Reply this comment
  40. Chris Bouwhuis
    Chris Bouwhuis 25 November, 2021, 23:43

    a solder suction/removal tool and wicking spool set is only abt $10. Will be well worth your while even for occasional projects considering your troubles here. good job otherwise.

    Reply this comment
  41. Tyler Sanders
    Tyler Sanders 25 November, 2021, 23:43

    Does your Ac input Amps have a impact on your PSU turning on i have a
    evga 500W 80 plus. That won't turn also i had a 600w that did not turn
    on so i exchanged it for a 500w power supply. Would a power strip help
    with the problem?

    Reply this comment
  42. justsomeguytoyou
    justsomeguytoyou 25 November, 2021, 23:43

    The proper way to solder is to heat up the joint with the iron, and then touch the solder to the joint—never touch the solder with the iron.

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  43. 0Ellestrid0
    0Ellestrid0 25 November, 2021, 23:43

    A couple of mine capacitor's are slanted

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  44. Benjamin Esposti
    Benjamin Esposti 25 November, 2021, 23:43

    Be careful with this bestec PSU.
    When the capacitor goes bad, the 5VSTBY (purple wire) can go unregulated – I've seen it go up to nearly 30V!
    It WILL fry a motherboard in that sad state of operation…

    Reply this comment
  45. Mir studio
    Mir studio 25 November, 2021, 23:43

    Its planned obsolescence placing the capacitors near heatsinks .
    Replace it and cover it with some heat resistant reflexive tape . (white glass fibers tape)

    Reply this comment
  46. TechnologyKing
    TechnologyKing 25 November, 2021, 23:43

    I would never do this. Too high of a risk, I would just buy a new psu and there only $40 these days

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