Hi, I just finished building a new PC for my brother and we gave it a test run. We installed UT3 (The Game)to give our new beast a spin. Everything ran fine for a few hours but suddenly the whole thing just shutdown. To save time I won't go into all of the specs details. I have unplugged everything inside the CPU tower and attached just the PSU to the MOBO but still it won't start when I press the power button. All I see is the power LED for a few seconds on the CPU tower before the LED dies completely.

Is my brand new 550W Crosair PSU dead or is my brand new Gigabyte P35-D series MOBO dead? How can I check to see what has gone wrong without having to take it to a tech nerd.

Thanks in advance.

Here are my system specs which I picked with the help of this forums members a few months ago.

Code:

MOTHERBOARD = Gigabyte GA-P35-DS3R

http://www.directcanada.com/products/?sku=11830BD0443

PROCESSOR = Intel Core 2 Quad Q6600 Quad Core

http://www.directcanada.com/products/?sku=12200BD3212

GRAPHIC CARD = Galaxy GeForce 8800GT

http://www.directcanada.com/products/?sku=24630BD6770

RAM = G.SKILL 4GB / 2 Sticks

http://www.directcanada.com/products/?sku=15380BD0292

PSU = Corsair VX550W 550W

http://www.directcanada.com/products/?sku=11130AC9786

HARD DRIVE = Western Digital 320GB SATA

http://www.directcanada.com/products/?sku=15080DR0838

That's pretty much everything important. I've used the same heatsink+fan combo which came with the Quad Core. Although I removed the thermal paste which was already on it and applied Arctic Silver for better efficiency.

One important thing is that I've done a test built of these specs while I was in Canada, where voltage was 110-120 and everything ran fine. I am now in Pakistan, where voltage is 220-240, and upon powering up the test build everything also ran fine as the Corsair PSU automatically converted from 110 to 240 (one of the features it has due to which I bought it in the first place).
Like I said everything ran fine for a few hours until it completely died. Now when I press the power button, the power LED comes on for a second or two and then just dies. Nothing powers up!

Sorry to bring up this thread from the dead but I've been busy with exams.

So guys can someone please provide some input?

Thanks in advance!

First thing I would do is get a PSU tester.

Here is a general Google:

psu tester - Google Search

Do you have a good PSU that you can test in place of that one?

Try reseat the CPU, RAM as well as the PSU connectors to the mobo, look like to me the PSU may causing the problem as well.

Hope this helps!
Bill