Hello,

I actually bought mine from Microcenter. The issue is that the computer is left alone and when I come back the computer is asleep and the power light on the case is blinking (normal behavior), but when I touch my keyboard to wake it up nothing happens. Hitting the power button does nothing. From there I try holding down the power button to discharge the capacitors and I try to disconnect the power and nothing ever works. The first time this happened I returned the PSU thinking it was dead and got another refurbished one of the same model. But then after trying those things for a while I push the power button again, it springs to life, and I'm back at my Windows desktop as if it just woke up from a sleep.
Then I built a new computer using this new PSU and this happened again. I don't know exactly what fixes the problem, but eventually it works again. Now it's happened a third time and I want to find out what is going on. 99% of the time it goes to sleep just fine and I wake it up with no problem. What could possibly cause this?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://arstechnica.com/civis/viewtopic.php?f=11&t=1368193
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Thank you.