Machine blowing plug fuse.

hanluc

hanluc

hanluc

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I have a Corsair 1000w PSU running a 3770k, woke up this morning to find the machine dead. The 3 amp plug fuse had blown going to the PSU, so I tried another kettle lead and it immediately blew that fuse.
What would be the diagnosis here?, I know the obvious choice would be the PSU but is it possible that there a a short the the Mobo? though I would have thought that the PSU would have shut down before blowing the fuse if that were case, but I don't know.
 
3A is too low a fuse.

1000w / 230V = 4.34A, you need at least a 5A fuse.

*edit*

Missed the bit where it re-blew the new fuse on boot, I know the is no power saving features actuve while booting but im not sur eif it should be drawing more than 3A when not under load or anything, is the 3770K overclocked? what GPU you got in there? I was assuming you left it on overnight running Boinc or something and it overloaded an underrated fuse but that may not be the case.
 
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OK point taken, but I was drawing around 400w max, and as I said it immediately blows the fuse so it's not that.

Edit

It's mildly OC'd to 4.1Ghz and it has a 570 in it.
It doesn't blow the fuse on boot, it blows it the moment I switch the PSU on, the green light on the MB flashes on for a split second then dies. I suppose the thing to do is disconnect it from MB then try it. Work know so I'll try that later.
 
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