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Weird problem with Seasonic X-660

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  • Components
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April 30, 2013 12:05:55 PM

I am cornered here. Can't turn my PC off. If I do, my system won't turn on. A few weeks ago I started getting delays when turning on the system, meaning I had to wait like 5-10 seconds until the system started to receive power. After a while, I couldn't turn it on completely. The PC is new so I returned it to the store where they assembled it and after 2 weeks (just to check the damn computer!) the technician told me there is nothing wrong with it and that it works perfectly, and he was right until now.
I have the same problem now. The PC won't turn on or will turn on for a split second. I have managed however to turn it on with the following steps:
1. Short the PSU_ON pin to ground
2. Wiggle the AC cable a bit causing sparks
I have done this 3 days ago, and you really can't tell there is anything wrong after long sessions of gaming and folding all night long. So what's really wrong here? PSU? Mobo????

More about : weird problem seasonic 660

April 30, 2013 12:16:53 PM

Sea Sonic's X series PSUs are the gold standard right now, so I'm surprised that you're having quality issues with one, possibly a poorly soldered joint. I'd suggest contacting Sea Sonic for an RMA
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April 30, 2013 12:21:30 PM

I just can't afford to be without a computer right now, as I really need word and orcad to finish my electronics project. Is leaving the PC on "forever" an option?
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April 30, 2013 5:05:33 PM

jagui said:
I just can't afford to be without a computer right now, as I really need word and orcad to finish my electronics project. Is leaving the PC on "forever" an option?


It sure is
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May 1, 2013 2:44:07 AM

As of today and after 16 hours of full power folding the computer still runs perfectly (aside from the fact it's a bit hard to fall asleep). What's causing this mess??? Is the PSU to blame or something else??
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May 1, 2013 1:06:30 PM

jagui said:
As of today and after 16 hours of full power folding the computer still runs perfectly (aside from the fact it's a bit hard to fall asleep). What's causing this mess??? Is the PSU to blame or something else??


Probably the PSU, but not definitely the PSU. Try testing it on its own with a jumper (short the green wire to a black wire on the 24 pin connector). If it turns on reliably 100% of the time, it's probably okay.

My concern is that you have to wiggle the AC cable a bit to get it running and that it sparks while doing so, this is extremely abnormal and may indicate that the ground wire isn't connected properly.
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May 2, 2013 7:43:56 AM

Pinhedd said:
jagui said:
As of today and after 16 hours of full power folding the computer still runs perfectly (aside from the fact it's a bit hard to fall asleep). What's causing this mess??? Is the PSU to blame or something else??


Probably the PSU, but not definitely the PSU. Try testing it on its own with a jumper (short the green wire to a black wire on the 24 pin connector). If it turns on reliably 100% of the time, it's probably okay.

My concern is that you have to wiggle the AC cable a bit to get it running and that it sparks while doing so, this is extremely abnormal and may indicate that the ground wire isn't connected properly.


You were right. I tested the AC cable ground. No continuity. My computer wasn't even grounded all this time. I changed the cable ( a good one), but the sparks and the problem still remain. *EDIT I am pretty sure the ground on the wall outlet is okay
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May 2, 2013 11:31:15 AM

jagui said:
Pinhedd said:
jagui said:
As of today and after 16 hours of full power folding the computer still runs perfectly (aside from the fact it's a bit hard to fall asleep). What's causing this mess??? Is the PSU to blame or something else??


Probably the PSU, but not definitely the PSU. Try testing it on its own with a jumper (short the green wire to a black wire on the 24 pin connector). If it turns on reliably 100% of the time, it's probably okay.

My concern is that you have to wiggle the AC cable a bit to get it running and that it sparks while doing so, this is extremely abnormal and may indicate that the ground wire isn't connected properly.


You were right. I tested the AC cable ground. No continuity. My computer wasn't even grounded all this time. I changed the cable ( a good one), but the sparks and the problem still remain. *EDIT I am pretty sure the ground on the wall outlet is okay


Excellent. The PSU will not turn on if there's no ground continuity, but it may not require sustained ground continuity to keep running. Keep at it.
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May 3, 2013 1:55:39 AM

I swapped the cable and made sure the grounding is OK, but I still can't get the computer to turn on normally.
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May 3, 2013 10:57:25 AM

jagui said:
I swapped the cable and made sure the grounding is OK, but I still can't get the computer to turn on normally.


Did you check the ground continuity from a point on the chasis that's grounded to the PSU to the frame of the wall socket?
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May 3, 2013 1:50:05 PM

Forgot I had an old crappy 400W PSU laying around. I swapped it with the Seasonic and I have now no problems turning on the computer. However it doesn't fit the case, lacks many connectors and doesn't have enough wattage to power a GTX 670 (or the DVD burner, the second hard drive and the case LEDs). The Seasonic PSU is the problem. I now have to fight for an RMA.
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May 3, 2013 3:45:13 PM
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August 6, 2013 6:04:39 AM

I am having the same issue with a Seasonic X-760. The guys at the warranty are also saying that the the PSU is ok. It really is a weird problem and I'm not sure that I will be able to get it fixed or replaced.
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