Changing Capacitors on a bad PSU, Will it make a difference?

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  1. Posts : 2,047
    Windows 7 Home Premium 64-BIT
       #1

    Changing Capacitors on a bad PSU, Will it make a difference?


    Hi guys I'm just curious if this would make a difference. I found a shop that repairs PC power supplies that is just a few blocks from our house. My PSU gives stable voltages(Haven't failed even the load is 240W) but I can't trust it's Caps no more. I'll be replacing the caps of a 250W power supply.
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  2. Posts : 143
    Windows 7 Home Premium 64 bit
       #2

    Running a PSU near it's peak rated wattage/capacity is pretty much asking for a meltdown....; a few new capacitors would hardly seem the solution compared to the $40-$50 spent on, say, a new 430-450 watt PSU?
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  3. Posts : 2,047
    Windows 7 Home Premium 64-BIT
    Thread Starter
       #3

    The power supply doesn't do a meltdown at near or peak wattage and I just want my power supply to last longer
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  4. Posts : 143
    Windows 7 Home Premium 64 bit
       #4

    Some PSUs will handle running at max-load spec better than others; all I am saying is that running a PSU rated at 250W (that rating would be when it is new, out of the box, by the way) at constant 240W load will likely shorten whatever service life is left in it. If you disagree, then, by all means, sir... add a few more USB drives to it, all defragging at once, to run it at 260-270 watts load....when it does 'let loose', let us hope there are no voltage spikes to damage anything else, and that only the PSU is lost.
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  5. Posts : 2,497
    Windows 7 Pro 64 bit
       #5

    Why do you believe the capacitors should be replaced? Capacitors in a good quality PSU should last beyond the useful life of the computer. Replace them in a cheap PSU and you still have a cheap and unreliable PSU.

    It may be different in the Philippines but where I live it makes no sense to do any kind of repairs on a 250 W PSU.
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  6. Posts : 13,576
    Windows 10 Pro x64
       #6

    Just buy a new PSU :)
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  7. Posts : 4,198
    Windows 10 Pro
       #7

    In my personal experience if you replace capacitors with same frequency and uF of higher grade/quality capacitors they'll work just fine as long as expert solder the capacitor back on the pcb.
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  8. Posts : 2,973
    Windows 7 Professional 64bit SP1
       #8

    I wouldn't trust a PSU that has had components replaced by anyone except the manufacturer. If it's under warranty and it fails, or acts hinky in any way, send it back for repair.....if not, time for a new one. They have dropped in price so drastically, it makes no sense to try to get extra mileage out of a vital component like that when you can get a quality PSU for around $60.
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  9. Posts : 5,915
    Windows 10 Pro X64
       #9

    I think a new PSU is the best choice.
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  10. mjf
    Posts : 5,969
    Windows 7x64 Home Premium SP1
       #10

    Definitely I'd go for a new PSU.

    After a reread it seems you wouldn't be doing the replacement yourself - potentially very dangerous.
    Still I'd dump the old one and buy a good new one.
    Last edited by mjf; 13 Dec 2014 at 23:03. Reason: Misunderstanding
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