Dead PSU?!!

[Johnatron 101]

Just bought a brand new corsair rm850 modular PSU of Amazon and when I put it into my system, I could hear a very quiet buzz coming from inside the PSU when I attempted to turn it on and the only thing that would happen is that the motherboard would light as usual but nothing else would happen, and when I pressed the power button there would be a small click from the psu and then nothing. No new lights, nothing. I suspect that the PSU is dead as prior to the upgrade there was nothing wrong with the system. Any other ideas on what's wrong before I return it? 

[Juular]

Are you sure you've connected all the required power cables ? Try clearing the CMOS, there were reports that this sometimes helps, no idea why tho, maybe smth related to sleep states and such.

[penguin1]

Go and borrow a psu from somebody else and check and see if it is something else like the motherboard. I upgraded my rig and thought is was the psu but it was the board. I would suspect it being something else if the lights are coming on but nothing else.

 

[Spotty]

18 minutes ago, Johnatron 101 said:

I suspect that the PSU is dead as prior to the upgrade there was nothing wrong with the system.

What was your previous power supply?

[Johnatron 101]

11 minutes ago, Spotty said:

What was your previous power supply?

It was an Evga 600B and it worked without any fault I only bought the corsair unit because I wanted modular cables and a bit more overclocking headroom

[Johnatron 101]

19 minutes ago, Juular said:

Are you sure you've connected all the required power cables ? Try clearing the CMOS, there were reports that this sometimes helps, no idea why tho, maybe smth related to sleep states and such.

Not sure how clearing the cmos would help but it's worth a shot! 

[chartkor]

8 hours ago, Johnatron 101 said:

Just bought a brand new corsair rm850 modular PSU of Amazon and when I put it into my system, I could hear a very quiet buzz coming from inside the PSU when I attempted to turn it on and the only thing that would happen is that the motherboard would light as usual but nothing else would happen, and when I pressed the power button there would be a small click from the psu and then nothing. No new lights, nothing. I suspect that the PSU is dead as prior to the upgrade there was nothing wrong with the system. Any other ideas on what's wrong before I return it? 

Might be a silly question, but have you plugged in CPU power source in top left corner of mobo?
I know I often forget about it despite building many systems

[Guest]

9 hours ago, Johnatron 101 said:

It was an Evga 600B 

Isn't that PSU semi-modular?  You're not using any of the orignal EVGA cables with the new power supply, are you?