Random shutdown, GPU fan @ full speed, Now, not starting again.

[kmr1154]

Hello

My PC is custom build and here are the specs

intel core i3 530 cpu
intel dh55tc motherboard
8 gb ram (2 + 2 + 4gb)ddr3
hd 5830 1 gb gpu
corsair cx600 v2 smps

So the thing is these weird random shutdowns these days, whenever i regular work on my PC basically, my pc shuts down itself, first monitor goes off then gpu fan goes to 100% speed (maybe more than 100%), HDD led goes very dim, power led stays off, led inside motherboard stays on. To shut this thing down i have to forcefully cut its power source.

The main thing is my PC doesn't even starts again after a shutdown like this, when i press the power button to start it again, all the components inside cpu starts for about a second then goes off and hdd led stays on but very dim.

To start this thing i have tried a lot of things including cleaning up the mess of wires, cleaning up dust, removing and re-placing the ram, replace sata cables. At last, i thought it is my smps which has given up (bought this april 2012) but i tested it with hair pin test and it worked perfectly (connected atx green wire to any of the black ones).

The trick which worked for me is that, i removed atx connector from motherboard than pushed the power button(i know it won't start) then turned off the power and re-plugged the atx connector to its place, now my PC started like before after pressing the power button.

Now i want to ask the expects what do u think is the problem? Is it hardware related (My GPU or Motherboard) or some software incompatibility? I am asking about incompatibility because i am using windows 8 release preview since 4 months, i never had such an issue with windows 7 or any previous version of windows.

Now this problem is expanding, whenever i shutdown my PC, it is putting me on the same situation like when that random shutdown happens. I have to always remove atx plug from CPU to start my machine. Please tell me any permanent solution to this. How do I know if my gpu or motherboard is bad or some other hardware?

Please help me if u know anything about this problem!!!!!


Thanks in advanced

 

[Onus]

That the PSU starts doesn't mean it's good. The Builder V2 series was made by Channel Well, not Seasonic, using inferior Samxon capacitors from a line known to experience early failure. While that may not be what has happened, ruling it out by testing with another PSU makes sense.
Links: start here, and follow the referenced link to the badcaps.org forum: http://forums.hardwaresecrets.com/not-so-tough/8805?threadid=8805?goto=newpost

 

[kmr1154]

Thanks for your reply,

You mentioned my psu, but I tested it with hair pin for about a week and it ran flawlessly without any problems, if I am about to replace it, what do I say to the service person? He won't believe me that this smps is bad, so no replacement without any proof of damage.

Also I don't have a spare smps equivalent in power of cx600 v2. I only have generic cheap w450 smps which can't even run my second hdd, so no way it can run my hd5830 which is a power eater card.
So, any good suggestions?