Question psu problem or UPS

[TheHuNtEr_4532]

the problem is first seen two days ago.
i tried to start my pc from mu UPS and it didn't start. then I plugged it directly to my power outlet and it started. again today I tried to start my pc from UPS and the same problem occurred. this time turned off my PSU and unplugged the cable from PSU and plugged again and finally, pc started. my pc configuration is -
Core i7 6700k
ram 16 GB ddr4 with the default speed
gtx 1070 as the graphics card
and corsair VS 650 as PSU
I have ups with Capacity of 650 VA. just to save pc from sudden power surge and voltage fluctuation.
so, the problem is with PSU or UPS?

 

[Masterchiefxx17]

Sounds like a fault with the UPS. I would contact the manufacturer for a warranty claim.

 

[jonnyguru]

Why in the world are you turning your PC on and off via the UPS????