PC Hardware forum


Power supply issue

by ethtrh465yt5t5 / April 23, 2013 10:53 AM PDT

Hi, I bought a new power supply for an old computer that has been without power for a few years. (1.3Ghz Duron)

The PSU powers up the computer and everything seems normal, for a little while. Then, randomly, it just powers down. Then it stays off.

I have another computer that works just fine and I put the new PSU in it to see what happens. Same thing.
Works for a little while then it powers down and stays off.

Also, I took the power supply out of my working computer and tried it in the Duron, and it worked just fine without issue.

So I have concluded that the problem IS the new PSU that I purchased for the Duron.

It's really confusing though, because how does it "gain" power to eventually power the computers it is in for a little while? I mean, once it dies, it won't work. But if you leave it for a while, it works (for a short time).

Very strange. I am scared that the store will test it out when I take it back tomorrow and find it works and disregard the fact that it WILL power itself off within a few mins or a few hours.

Please help! Thanks!

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All Answers

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Those models were very picky about power.
by R. Proffitt Forum moderator / April 23, 2013 10:58 AM PDT
In reply to: Power supply issue

It took "Athlon rated" supplies and it's pretty rare to find such supplies today. The best I can do is get a PSU double or triple what you think you need and hope.

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Dust bin
by Willy / April 23, 2013 10:30 PM PDT
In reply to: Power supply issue

New PSU but no clue to what it is, as in specs, etc.. You basically did the real test and it fails, no need to figure out why, it powers down then OFF, just RMA it and replace it. If the shop tests it, then explain your results and leave it at that.

Now, if this is a cheap or bargain PSU, now you know why cheap is cheap. I can't recall any PSU doing what you stated other than failing entirely. Since, this is an old AMD based PC, you shouldn't need a fancy PSU and not even a powerful one, but you do need a decent brand or one if generic, at least in the 500W range just to cover demands. There is the outside chance your old PC somehow causes a PSU failure but that's a guess. Some older PC's had separate voltage regulator as a big part of the mtrbd. it maybe causing an issue but again that's a guess. If you get into rebuilds of old PCs don't fret too much because its better to pitch a part than fight it, because it's old. worn and/or toxic combo with other parts causing weird problems. Shocked

tada -----Willy Happy

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by ethtrh465yt5t5 / April 24, 2013 12:26 AM PDT
In reply to: Dust bin

Thanks, Willy. I just wanted to remind you in regards to you "old computer" comment, the PSU powers does the same thing to my other computer which isn't as old.

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PC 101
by Willy / April 24, 2013 4:12 AM PDT
In reply to: @Willy

In your OP, you stated you installed in old PC, which may have caused a problem. Then installed in newer PC which reflects same problem. In other words, you're old PC may have taken it down and now it repeats the problem. On the other hand, it may have been bad to to begin with, regardless of which PC its installed in. Let's hope the replacement does the job. Also, I stated in older PCs they can have issues having sat in the "closet" or become old and worn after prolonged use even just typical use. good luck

tada -----Willy Happy

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Maybe the PC is just bad...a new PSU wont 'fix' that.
by VAPCMD / April 24, 2013 9:21 AM PDT
In reply to: Power supply issue

Like the forum message says...please provide the PC mfg, the series and model number ..... and approx PC age. Without specific info ...we're really really in the dark.


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