Second dead psu in a month, is it the system?

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Devinchellberg

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Oct 31, 2013
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Hi! Two weeks ago I came back from a day of work after having turned off my pc the night before to find it not powering on - tried a new power cable, checked all internal connections, and didn't find anything amiss. Replaced the power supply with a new TX750 and it started up with no problem! Then after working perfectly for 2 weeks it wouldn't turn on again last night. First time attempting to turn it on the HD spinned up, but neither the cpu or gpu fans moved at all. It powered off after about 20 seconds and wouldn't come back on. Don't have a green light on my mobo, have checked everything I know.

Did I just get a faulty psu, or is something in my pc burning them out? Have a fairly new Intel mobo with an 2500 series i5, a radeon 6850 graphics card, a ssd and an HD.

Thanks for your help!
 
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If you have a volt meter check the power from the wall first. If you are in the U.S. it should be 120V +/- 5%. If it is out of range you have a home wiring problem. If you aren't in the U.S. ch3eck what it should be in your country.

If that's OK, check the PSU while not connected to anything but the wall outlet. And I mean wall outlet - no extension cords. Search "computer PSU paperclip test". If the new one works OK check the one you replaced also.

If both are good then it's something inside the computer. Strip it down to the bare essentials to boot and try it. If it still won't boot then it is something still in the box. If it works OK, start adding things back in until it won't boot again. Then the last thing you put back in is the...
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thx1138v2

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Jun 18, 2011
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If you have a volt meter check the power from the wall first. If you are in the U.S. it should be 120V +/- 5%. If it is out of range you have a home wiring problem. If you aren't in the U.S. ch3eck what it should be in your country.

If that's OK, check the PSU while not connected to anything but the wall outlet. And I mean wall outlet - no extension cords. Search "computer PSU paperclip test". If the new one works OK check the one you replaced also.

If both are good then it's something inside the computer. Strip it down to the bare essentials to boot and try it. If it still won't boot then it is something still in the box. If it works OK, start adding things back in until it won't boot again. Then the last thing you put back in is the faulty part.
 
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Solution
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Devinchellberg

Honorable
Oct 31, 2013
3
0
10,510
The only other psu I have available is the one that stopped working a few weeks ago. As soon as I get home I'll wall test / paper clip test them both and see what that returns. If either of them are good I'll start booting my way back to a full pc, thanks for the advice!

If the psu(s) are actually dead, could that be caused by something in the pc, or will replacing it again completely solve the issue?
 
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rolli59

rolli59

Titan
Oct 27, 2007
47,790
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Quality PSU's like the TX has internal protection so it should not damage from component site even the AC side on a active pfc should run trouble free on 100-240volts AC at 50-60Hz. It is more likely that one of those protection is activated because something is wrong on the component side refusing to start the PC.
 
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