Newly built computer occasionally does not power on after using case switch unless PSU power is cycled

rmi05

Reputable
Sep 9, 2015
8
0
4,510
Hello,
I recently built a PC with these specs:
CPU: i5 6600k
MOBO: MSI z170 Krait Gaming
GPU: MSI R9 390
HDD Samsung EVO 850 256gb SSD + 2 tb HDD
RAM: 16 gb g skill
PSU: EVGA NEX750B 750watt

The machine runs fine when it is functional. Intermittently, when pressing the case power button to power on the system, the machine does not power on at all. I have tried shorting the pins on the motherboard and using the reset switch instead to no avail. The problem mostly presents itself after extended inactivity (overnight, after coming home from work, etc.) The solution is solved when power cycling the PSU.

The problem also occasionally presents itself when trying to wake the computer from its low power standby state, but not every time. After this happens, power cycling the PSU and turning on the computer again with the case switch wakes the computer and resumes all my programs as normal.

I have temporarily bypassed these issues by powering off my PSU every night (should this be done)?

I have my computer plugged into a surge protector.

EDIT: After looking at the PSU tier list could it be that this PSU isnt suitable for Skylake or is just poorer quality? Should I consider returning it and replacing with a better PSU prophylactically? I am unsure if this is a Motherboard or PSU problem. There is a BIOS update for my motherboard but I am hesitant to flash as it seems like a risky proposition.

Any help is appreciated. Thanks.