Cannot turn on PC normally, having problems with Corsair 800D and Asus IV extreme

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gonki1

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Jan 16, 2014
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Like the title says, I can't turn it on normally, I kind of have to jumpstart the computer through an extension cord, power button on the motherboard isn't working and neither is the button on the cabinet.

My setup is like this:
Corsair 800D
Asus IV extreme
I7-3930k
2x R7970 crossfire
16gb vengance ram
1TB HDD and 90 gb ssd can't remember the name of the hard drives.
And a xfx 1250 PSU.

I've tried removing the GPU's, 2 of the RAM's, and disconnecting everything in the usb's .Still won't power on by neither of the buttons.
Googled alot but can't find the solution, anyone have this problem or know how to fix it? ..
 
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gonki1

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Jan 16, 2014
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Yep, just got time to try it and confirms the problem lies in the motherboard, what would you suggest? it's only 1.5 years old, 2 year warranty on these things usually right? if not :p a new one doesn't cost that much.
 
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gonki1

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Jan 16, 2014
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10,510


oh btw... I forgot one detail that might be important, i can turn the computer off by pressing the button, but not on. and there is power on the motherboard at all times if it's connected. Don't know why i forgot to add that in the top post..Must have been late.
 
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rolli59

rolli59

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Oct 27, 2007
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Touching the screw driver to the two pins acts like pressing the button to turn it on, that you can turn off the computer with the button means that the button works and if it is powered the pins work to shut it down. The only other thing it could be is the PSU so before dismantling can you try another PSU to make sure?
 
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gonki1

Honorable
Jan 16, 2014
4
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gonna find another psu. might have to snatch my old one, not sure how big it is, i'll just have to remove parts. Will report back when I have time to try it.
 
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raja@asus

raja@asus

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Sep 28, 2011
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If it worked fine before - then something may have developed a fault. A few things that spring to mind anyway:

1) I had an issue in the past where a user was using AMD video cards with display port to connect to the monitors. The DP cables he sued were non-compliant and had a pin connected that passed power from the monitors back into the board. This caused all kind of havoc for the user as the board was getting power in standby it should not have been recieveing. Unfortunately there are a lot of DP cables made wrongly (cheap ones especially). We bought cables like his and checked them in ab and found pin 20 was connected which violates DP spec. When we showed him what we found he went and purchsed some approved cables and all was fine afterwards.


2) If the machine was overclocked, I'd clear CMOS. Also remvoe from case and try on open testbed with bare minimum of components. If it still has issues starting then maybe an RMA is needed.

-Raja
 
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