Is this motherboard crazy?

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rarzer

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Jan 20, 2015
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Okay, PC works fine. I can enter Windows and do anything. Problem comes when I turn it off. After a minute or so, leds and fans will turn on automatically for a fraction of a second and turn off again on a loop. I tried removing the case pin connectors thinking there could be a short but still the same. Ideas?

Asus x99-e ws
i7 6850k
Zotac 1080 gtx
gskill ddr4 32gb
Seasonic 750w x-gold
Samsung 950 pro m.2
Silverstone RV03 Case
 
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You're welcome. Also, you're running a very high quality power supply that should not develop these types of issues until at least five years of heavy usage has passed. I would contact Seasonic and ask for their opinion on whether or not they think this may be a sign of a possible developing malfunction. If they say anything other than a flat out no, simply take advantage of your warranty.
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rarzer

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Jan 20, 2015
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yeah windows 10. The only way to stop this loop is either to turn on the computer or to unplug psu cord.

Update: It's not only when turning off, but always. sorry for the confusion.
 
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weberdarren97

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Aug 10, 2015
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Please clear CMOS on the motherboard. This is done by turning the machine off, unplugging it, pressing and holding the power button for three seconds to drain any remaining power, opening the case, and removing the CMOS battery from the motherboard. Note: the CMOS battery may be hidden under any expansion cards you may have installed.

After five minutes, put the battery back in, turn on the machine, boot into BIOS setup rather than Windows, set the date and time, restore any custom settings you may have had, save your changes, and boot into Windows.

Since your issue seems to happen mostly when Windows is not running, go ahead and shut down once Windows boots and see if this erratic behavior is still present or not.
 
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rarzer

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Jan 20, 2015
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Thank you for your help, tried CMOS already with no luck. My guess is that motherboard might be shorting with the case somewhere. If nothing helps I'll just try to take it outside from case and see ehat happens.
 
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weberdarren97

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Aug 10, 2015
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That was actually going to be my next suggestion.

While you remove the motherboard from the case, check to see if any cables that may be behind the motherboard have been speared by sharp solder points on the back of the board. My solution to this issue: put a piece of construction paper or card stock behind the board so that it cannot make direct contact with anything else. A few pieces of paper will also work just fine.
 
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rarzer

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Jan 20, 2015
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Okay I found out the reason. Removed the case, left only the GPU and didn't do the loop. Plugged secondary ssd and that's where it failed. It was a bad peripheral power cord connected to that SSD. Replaced it and worked fine. Thanks for your help anyways :)
 
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weberdarren97

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Aug 10, 2015
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You're welcome. Also, you're running a very high quality power supply that should not develop these types of issues until at least five years of heavy usage has passed. I would contact Seasonic and ask for their opinion on whether or not they think this may be a sign of a possible developing malfunction. If they say anything other than a flat out no, simply take advantage of your warranty.
 
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Solution
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rarzer

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Jan 20, 2015
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Ouch. It's happening again.

I removed it from the case again and keeps doing it. I've ruled out everything except for PSU, motherboard and CPU.

Tried to add two graphic cards and stress the hell out from it, GPU rendering at 100% usage and also rendering with CPU at the same time, trying to see if power supply would fail with so much drain. After more than two hours it didn't crash at all and it remained cool and quiet. . One hour later, while reading mail it shut down and started the loop once again.

Could it also be a motherboard issue? I might RMA both mobo and PSU, but I live in a very remote island in middle of no where and it's going to take long weeks, not to mention the high postal fees.

Something else I realized: After the loop, it will only work again when I unplug all cords from the PSU and plug them again.
 
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weberdarren97

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Aug 10, 2015
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I'm stumped. Hopefully someone more helpful will stumble across this post and offer you their assistance.
 
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littleleo

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May 8, 2009
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Try turning off the "quick start" mode and see if that helps.

 
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rarzer

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Jan 20, 2015
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Thanks for your replies. In the end, there was a point where PC would no longer turn on anymore. Someone lended me another PSU for testing and worked. So I have to RMA mine to Seasonic. I wouldn't expect a so reputable brand (and model) could die so quickly. Thanks for your help again!
 
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rarzer

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Jan 20, 2015
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Yes, there are common here. As well as lighting storms. I have an APC pure sinewave Smart UPS and a power surge for that matter, but I guess even with all this protection there's always some risk involved. Thanks for your help, I really appreciate it.
 
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weberdarren97

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Aug 10, 2015
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Is this plugged into a 3-prong outlet that's properly grounded? If not, it won't able to counteract a surge. When there's a surge, the electricity has to go somewhere. If there's no ground for it to go to, it will only have one route to travel and that's through your equipment.
 
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