Power Supply Failure??

[imablackhat]

I just built a mITX i5 Kaby Lake w/ 970 & 1 SSD, 16gb ddr4... anyway I have a AX750 Corsair PSU.. my current issue is.. I'll be using my computer then poof randomly turns off and won't turn back on until the next morning....... The PSU I did buy was a refurb from Corsair but really...................... Help

[Altecice]

do you have any signs of life ( power LEDs etc) ?

[kelvinhall05]

3 minutes ago, imablackhat said:

I just built a mITX i5 Kaby Lake w/ 970 & 1 SSD, 16gb ddr4... anyway I have a AX750 Corsair PSU.. my current issue is.. I'll be using my computer then poof randomly turns off and won't turn back on until the next morning....... The PSU I did buy was a refurb from Corsair but really...................... Help

 

If it's refurb, it probably was returned because of this issue. I would check that all the cables are plugged in well, check temps, and contact Corsair if everything else doesn't fix the problem.

[Mr.Humble]

41 minutes ago, imablackhat said:

I just built a mITX i5 Kaby Lake w/ 970 & 1 SSD, 16gb ddr4... anyway I have a AX750 Corsair PSU.. my current issue is.. I'll be using my computer then poof randomly turns off and won't turn back on until the next morning....... The PSU I did buy was a refurb from Corsair but really...................... Help

Also if you happen to have a spare PSU around or if you can borrow from someone you know to see if it is the power supply and not for example a motherboard issue

[Aniallation]

If your computer RANDOMLY turns off it is likely not an issue related to PSU, rather something with motherboard or another system component. If PSU isn't enough, it will shut down abruptly when put under heavy load.

[STRMfrmXMN]

4 hours ago, kelvinhall05 said:

If it's refurb, it probably was returned because of this issue. I would check that all the cables are plugged in well, check temps, and contact Corsair if everything else doesn't fix the problem.

Refurbished Corsair PSUs are refurbished in-house so I doubt OP was sold a defective PSU.

 

4 hours ago, imablackhat said:

I just built a mITX i5 Kaby Lake w/ 970 & 1 SSD, 16gb ddr4... anyway I have a AX750 Corsair PSU.. my current issue is.. I'll be using my computer then poof randomly turns off and won't turn back on until the next morning....... The PSU I did buy was a refurb from Corsair but really...................... Help

As @Aniallationsaid, PSU failures are often the culprit when the system shuts down under stress when the PSU is suddenly no longer capable of providing the load the system needs, which it may have been capable of at one point. 

[DarkKnightVFX]

5 hours ago, imablackhat said:

I just built a mITX i5 Kaby Lake w/ 970 & 1 SSD, 16gb ddr4... anyway I have a AX750 Corsair PSU.. my current issue is.. I'll be using my computer then poof randomly turns off and won't turn back on until the next morning....... The PSU I did buy was a refurb from Corsair but really...................... Help

Word of advice: don't buy refurbished PSU's..

 

Either way, troubleshoot to see if you can fix the issue. More than likely if your system is shutting down then it is indeed failing, I had the same on one of my old PSU's. I'd RMA it, assuming you haven't already voided your warranty. Corsair is great about replacing PSUs

[mcc1961]

I had a Corsair 430 watt PSU and if it was cut off overnight or for a long time it would cut off in 5 or 10 seconds into the startup sequence.Also it would cut off randomly in the boot process. Corsair had me a new 500 watt PSU in just 2 days.