Sudden shut down problem after 2 months

[cubex]

Hi guys, I have this PC with this spec:

RAM - 2x kingston 2GB DDR3
VGA - NVIDIA GeForce GTS250
MB - GIGABYTE S-SERIES GA-P41T-ES3G
CPU - Intel Core 2 Quad CPU
PSU - SimCool 430W

My problem is that my PC starts to give me sudden shut down problem. no warning, no nothing, just shut down like when we pull the power plug.

I went to the shop where I bought this PC to check for any hard drive error, and they said nothing is wrong with it. they gave me a new power cable, the PC lasted for a 1 or 2 days without the problem.

And then now it started to give me this problem all over again.

Any comments or speculation on where the problem is?
anything i need to know to fix this?

Thanks for the help guys =)

 

[Feuerfrei.x]

It's probably a dodgy PSU - I've never heard of the brand you posted, I looked them up on google but came up with nothing

Thanks xx