New power supplys not working

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Joined
20 Jun 2016
Posts
6
Hi,
I have an msi nightblade 85c..I decided to upgrade the graphics card. I now needed a bigger power suppy..I went out and bought a silverstone sx550 80 gold rated psu..i fitted it in connected all the cables etc back..When i turned it on the system fan spun for 1/2 a second then nothing..I tried every possibe thing and the same thing happens but nothing will make it work..I came to the conclusion that it must be a faulty psu So i took it back and bought a different brand..A corsair 600w 80 bronze rated psu..Plugged it all in etc turned it on and the same thing happened,system fan spun for 1/2 a second then nothing..The stock psu works fine..What the hell is going on here? Will these pc's not work with any other psu?

Thanks
 
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