PC blows house fuses

[Gunnar_22]

Hi guys,

This morning I tried to power up my PC. So I pressed the front power button. My PC turned on for like a millisecond and then instantly shut off. I tried pressing the power button again, but nothing. Then I discovered the house fuse was blown out.

I narrowed the problem down to my PC. I unplugged everything, turned off my PSU and surge protector. I tried two different outlets on two different electrical groups. When I turn on the power button of my PSU the fuse blows out.

I suspect my PSU is defect. It's a OCZ700MXSP (so 700W). I have used it on an older build before and it worked fine until this morning. The weird thing is: the night before I turned my PC off like always. I only turned it on after a woke up. So nothing happened in between as far as I know. I don't understand how a PSU could suddenly stop working like that. The only reason I can think off is: a few months back there was a lightning strike close by which caused a power outtage. It screwed one of my HDDs. Maybe it screwed with my PSU as well, damaging it. So could it have been dying ever since? I'm really at a loss, because I don't know if its really my PSU or some other component in my PC. Any ideas?

Specs:
i7-5820 3.3GHz
GeForce GTX 970
ASUS X-99A motherboard
4x Kingston HyperX DDR4 4GB
OCZ700MXSP (700W) PSU
Mugen 2 cooler block
Samsung 256GB SSD
2x Seagate HDD 1TB

UPDATE:
I simply replaced my PSU and haven't had any problems since. So it seems my old PSU was just faulty.

 

[chegalhavara]

Yup. Can happen. Everything is working untill it stops working. Test it on another computer to be shure if you can.

 

[sykozis]

Electronic devices typically fail during "power on" because there is a sudden voltage spike when power is first applied to components that make up the device.

I used to have the OCZ700MXSP as well. It's not what I would consider a "high quality" unit....

 

[CountMike]

Keep on testing like that and you are likely blow the rest of computer too (if it wasn't damaged by now) !!!
Take PSU out, connect to power plug and with a small wire connect Green and any black wires on the 24 pin connector. Don't worry, there's only 5v there. But, rest assured there's nothing else except PSU in the computer that can blow house fuse so it has to be bad PSU !!!

 

[heavyartillary9]

unless you have pushed the fuse/breaker to its limit with lots of other stuff, it happened to me a while back in my old house, the breakers were low voltage and ran a bunch of stuff, if the psu is good then it may be your breaker is overloaded