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Computer powers up for a split second but does not turn on

post #1 of 10
Thread Starter 
Hey.

So basically I'm building a computer for a friend. I think I have everything wired correctly, however when I try to plug in the power and switch it on, it seems to come to life for a split second but not actually power on. This happens every time I flick the power on and off, however it will not boot.

Can someone suggest something for me to check? Thanks
RAWR
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RAWR
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post #2 of 10
It does sound like a short or dead hardware.

Did you put in the motherboard standoffs (usually little brass 1/4" standoffs that screw into the case so the motherboard doesn't touch)?
Remove all extra stuff (sounds cards, drives, etc.) and use just one stick of RAM.
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Gunmetal Tower
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post #3 of 10
1. Make sure its correctly connected to the stand-offs
2. Make sure that you have your memory properly seated
3. Make sure that your 4 pin power is plugged in

Unplug everything un-necessary, i've had where an expansion card has shorted the system out not allowing a boot. Once you have everything unplugged, if it boots, start putting one device in at a time until it stops booting again. Then you'll have an idea of which device it is. thumb.gif
The Laptop
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The Laptop
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post #4 of 10
Thread Starter 
Quote:
Originally Posted by IEATFISH View Post

It does sound like a short or dead hardware.
Did you put in the motherboard standoffs (usually little brass 1/4" standoffs that screw into the case so the motherboard doesn't touch)?
Remove all extra stuff (sounds cards, drives, etc.) and use just one stick of RAM.

I forgot to mention, I've had problems with this computer build before, the motherboard was returned and I just got the replacement so I'm trying to build it. I decided to build the computer outside of the case first to ensure that everything works correctly, so standoffs are not a problem. The motherboard is currently resting on the static proof bag on a flat surface while I try to get it working. I will try removing the graphics card and 1 stick of RAM, thanks.
Quote:
Originally Posted by appleg33k85 View Post

1. Make sure its correctly connected to the stand-offs
2. Make sure that you have your memory properly seated
3. Make sure that your 4 pin power is plugged in
Unplug everything un-necessary, i've had where an expansion card has shorted the system out not allowing a boot. Once you have everything unplugged, if it boots, start putting one device in at a time until it stops booting again. Then you'll have an idea of which device it is. thumb.gif

One second, I'll check the 4 pin is in.
RAWR
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RAWR
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post #5 of 10
You shouldn't set it on the static bag. The bag actually is conductive as the whole point is to route any charge around the components contained within. You need to place the components on cardboard or wood, something non-conductive.
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post #6 of 10
Thread Starter 
Ok so I got it working, basically I forgot to plug the 4-pin in :facepalm:

And with one victory comes another problem..

I mounted the motherboard in the case with the standoffs and plugged everything back in. Now, when I turn it on, it comes on fine as expected, however there is no video output to my monitor. I know it should work because it worked fine outside of the case, why has me moving it into the case changed this?

Thanks
RAWR
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RAWR
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post #7 of 10
Thread Starter 
I took out the graphics card and used the onboard VGA and it worked. I don't think the graphics card is faulty, what else could cause no video output when using a graphics card? It's a 6770 by the way.
RAWR
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RAWR
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post #8 of 10
Make sure power is connected to the GPU.
Make sure the GPU is properly seated. (Try taking it out and installing it again)
Make sure the monitor cable is connected.
Make sure that the setting for the video card is correctly configured in the BIOS. (It needs to be set to use discrete graphics card instead of the on-board GPU)
That's all I can think of.
Edited by {Unregistered} - 4/23/12 at 10:55am
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post #9 of 10
And then there is a BIOS setting to enable VGA via PCI EX??? check make sure that is good to go smile.gif (if you are not sure what I jsut said then just reset the cmos, take out the battery from the mobo with NO POWER connected to it and let it sit for 2 mins plug the battery then the power back in and you should be good)

One other thing try a different PCIexpress slot ... some board are weird like that ... and dont try to figure it out cause you will never know why :X

Fun times of learning how to trouble shoot! Man i miss days like that ... sometimes ..
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post #10 of 10
Thread Starter 
It turned out the I forgot to plug the graphics card power in again :facepalm:...

Anyway, got it all working and dropped it off to the friend I was building it for now. Thanks everyone for your help smile.gif
RAWR
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RAWR
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