new build computer is not powering on

December 28, 2011 at 13:19:57
Specs: None yet - will be Xubuntu, Pentium G840 / 8Gb
Hi! i just bought a new computer system for a custom build and having installed everything according to the various manuals, the computer will not boot.

When I hit the power button, both the case fan and the cpu fan start momentarily. I have checked all the connections several times now and they seem to be correct. I have found another article identifying a similar problem, but the individual did not specifically state what the problem had been after tedting all parts individually.

I have attempted to remove the ram in order to at least get the speaker to work, but that did nothing. Here aresome of the details of my build:

- Intel Pentium G840
- Corsair Vengeance DDR3 8Gb 1600MHz
- Gigabyte H61M-S2PV motherboard
- Antec High Current Gamer 400W power supply
- Intel 320Series SSD
- WD Caviar Green 2TB HD
- Coolermaster Elite 330 computer case
- Stock CPU fan

It doesn't appear to be a complex build, but this is my first in nearly 15 years...

Any advice or further questions would be greatly appreciated.

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December 28, 2011 at 13:32:28
Are you using the onboard graphics?

Did you apply thermal paste or thermal pad according to directions?

Is the auxillary 12V power (4 or 8 pin) connector to the motherboard connected?

Is the CPU fan connected to the correct header?

Is the heatsink installed correctly?

Are motherboard standoffs installed ONLY under hold down screws?

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December 28, 2011 at 13:51:08
Reset the Bios and it should start working.

View the Motherboards Manual. Find CMOS CLEAR. There will be 3 pins there.

Pins 1 & 2 are normal mode and pins 2 & 3 will Clear the CMOS.

Just remove the little cap from pins 1&2,
connect it to 2&3 for about 10 seconds,
then remove the cap & connect it back to the first 2 pins.

Hope this helps.

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December 28, 2011 at 14:19:49
If you wish to try clearing the CMOS be sure the power cord is unplugged. Also helps to depress the start button a couple of times to discharge the capacitors in the power supply.

Is the link below to your power supply?

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