Brand New PC Build On Death Bed!

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.

Here are my system specs which I picked:

  1. MOTHERBOARD = Gigabyte GA-P35-DS3R

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

  3. PROCESSOR = Intel Core 2 Quad Q6600 Quad Core

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

  5. GRAPHIC CARD = Galaxy GeForce 8800GT

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

  7. RAM = G.SKILL 4GB / 2 Sticks

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

  9. PSU = Corsair VX550W 550W

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

  11. HARD DRIVE = Western Digital 320GB SATA

  12. 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!

All help appreciated!

I would like to see pictures too. As i am also going to build my PC and your specifications are very near to mine.

Well it's un-assembled right now due to the above mentioned problem. Help me fix it and I will surely post the pictures of the rig :D

@unstopabl3

Try temporarily replacing PSU. I suspect PSU fault.

.

I took my rig to a friends house. Although I couldn't test his PSU on my MOBO as it was not compatible but I did test my PSU on his MOBO.

Surprisingly enough, his MOBO did boot up and ran just fine. So does that mean that my MOBO is indeed dead? If so then how could that be considering if the voltage difference were to be the case shouldn't the PSU be the one to be fried?

Secondly could it be that maybe another part of my built is malfunctioning i.e RAM, Video Card etc. without which the MOBO won't boot up so I can't test to see if that is the case by removing them from the MOBO.

Aggggh, I'm frustrated and don't know what to do. I don't want to spend money on a new MOBO because MOBO prices in Pakistan are through the roof and I know I won't find exactly what I need.

Your input with be greatly appreciated as you guys have never let me down before!

[quote=", post:, topic:"]

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.

Here are my system specs which I picked:

  1. MOTHERBOARD = Gigabyte GA-P35-DS3R

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

  3. PROCESSOR = Intel Core 2 Quad Q6600 Quad Core

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

  5. GRAPHIC CARD = Galaxy GeForce 8800GT

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

  7. RAM = G.SKILL 4GB / 2 Sticks

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

  9. PSU = Corsair VX550W 550W

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

  11. HARD DRIVE = Western Digital 320GB SATA

  12. 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!

All help appreciated!

[/quote]

The momentary power up indicates a few possibilities

1. CPU overheating. The bios is shutting the comp down to prevent the cpu from burning

2. Short on the mobo. Sometimes a screw gets stuck somewhere it shouldn't be and that causes a short. Not so likely given that you removed the mobo from the casing and still its not working.

3. Defective power up switch. Recently I had the same problem with my long running and very stable system. I suspected that it was caused by the casing SWITCH. I confirmed this by shorting the power pins on the mobo to power on the system. The system remained powered on after that.

Just look for the power pins using the mobo manual and short them using a screw driver. If the comp stays powered on then your casing switch is defective. In that case set "power after power failure" setting in the bios to "on" so that simply applying mains power will bring the computer alive.

Another thing you can do is to connect speakers to the mobo audio out or use the pc case speakers. The BIOS may beep during boot up and that could tell you what the problem is.

Best solution in such a scenario is to individually verify that each component is working fine by replacing each component with a working one in another system.

Also, try using a single RAM stick and booting it instead of with both of them. Try this with both sticks.

Open your PC switch it on (Not the main button to turn on the system, I mean the power switch.). Now most mObos have led lights in them to indicate that it has power so check that. If it blinks then there is power coming to the Mobo and there might be another component that is causing the problem. If it doesn't blink then your Mobo is busted good. Don't connect the ram and or other components, when testing.