Custom-built computer wont boot no POST

May 29, 2010 at 19:38:43
Specs: Windows 7
I put together a new Rig with new everything except a power supply and when i turn it on it comes one for a bit no post no nothing than it goes off and the power light will start blinking, constantly, once a second or so. I hit the power button, nothing happens. I unplug the computer, plug it right back in, and still the same problem. So i took it apart but together my old Comp using the old power supply it works fine i'm on it now.

So i took it back to the store the did a test it works fine there soon as i get it back home the same thing happens whats is going wrtong can any one help?

Specs

New Comp Old Comp

>CPU : AMD Phenom 2 x6 1055T > AMD Phenom x4 9600 BE

> Mobo: Msi 890gxm-g65 >Gigbyte GA-M57SLI S4

>DDR3 4GB >DDR2 4GB

I use same Video card in both XFX Radeon HD 5770


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#1
May 29, 2010 at 20:09:20
No power supply listed.

Did you benchtest the new hardware before installing it in the case? If it works outside the case but not inside the case, you probably have a motherboard standoff in the wrong spot & it's shorting out the underside of the board.

You realize that will will probably have to reinstall Windows due to the hardware changes, right?


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#2
May 29, 2010 at 20:10:50
Did the store use your power supply or their's?

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#3
May 29, 2010 at 21:52:45
The power supply im using is 450watt and the one at the store they used was 550watt. I think your right i might be a motherboard standoff I have to cheack on that thank you for all the help will keep you up to day

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Related Solutions

#4
May 30, 2010 at 05:19:13
"The power supply im using is 450watt and the one at the store they used was 550watt"

Useless info. 450W isn't necessarily bad, 550W isn't necessarily good. We need to know the brand name & the amperage specs.


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#5
May 30, 2010 at 11:21:50
Ok I got the Computer to work windows installed. but soon as i ran a Windows performance test it shut off and now it will not POST i unplugged everything but the Memory to see if it boots and it still a black screen the cpu fans is on the LED phase light are at phase 4 and it still will not go to POST. I took it out the Case like they did at store and Still no POST. What should i do

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#6
May 30, 2010 at 11:52:24
I tried it with one Memory stick too. the Os is Windows 7. The Motherboard want beep on start up u know how it gives that one beep

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#7
May 30, 2010 at 18:08:15
I would think that you need to get a really good power supply.

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#8
June 3, 2010 at 01:33:02
Thank you for all the help it was the Mobo I got a new Mobo and all is good thank you so much

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