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Computer turns on for half a second then turns off with new PSU

Last response: in Components
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April 6, 2014 12:26:58 PM

Hi, I made a new build about 2 months ago but recently my seasonic X-850w PSU died so I bought a Corsair RM850, my problem is that it will only power my computer for a split second, everything will turn on and spin for that second but instantly turn off. When i turn on the Corsair PSU my motherboard led lights turn on and stay on put when i press the power button all the lights turn off. I tested my pc parts with an old XION 700w PSU and everything turned on fine. Could it be my bad luck and got a DOA psu?

Hardware specs
Case: Cooler master HAF X
CPU: Intel i7 4770k
RAM: G.skill ripjaw X DDR3 1600
SSD: Samsung evo 840 750GB
CPU Cooler: Corsair H100i
GPU: Nvidia EVGA GTX 780 Classified
Motherboard: Asus maximus vi hero
Windows 7 home premium

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a b ) Power supply
April 6, 2014 12:31:06 PM

if your system is working with other PSU as you said and if you plugged all connectors properly (on the PSU) so PSU gone bad
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April 6, 2014 3:33:29 PM

Yeah, the PSU is prob bad.
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