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Motherboard shutting down shortly after power up

johnspack

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Honestly I'd look at the psu as well. What is that?
Cute responses, was trying to be cute myself as I've never heard of that psu... I'll remember not to do that again...
 
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I cleared the CMOS, got the motherboard out of the case , and it still does shutdown. However when not plugging in the 12v cable it stays powered on. I tried with and without the ram, graphics card and every other component. Can we for sure say that the problem comes from the PSU ?
Have you trying using just 1 stick of RAM in each slot? If one doesn't work in all the slots,try another one ;)
also: push all the wires into the power plugs for your mobo.
LEPA is made by Enermax and..has some cheaper parts.
JonnyGuru did NOT like it. :fear:
Where can you get parts from?
 
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I've never heard of that psu...
You've never heard of a LEPA PSU? I find that pretty hard to believe. They've been around for a while now.

Here I am wondering what is that? Or those? In your avatar. Here's your chance to make me look naïve as hell too.:fear:
 
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It displays 00 and instantly turns off.

I had an issue before with an Asus M5G although mine would just keep on restarting. Tested the CPU on a different board and it would display 00 on the Q-Code LEDs. I tested with parts, different PSU, different RAM (tried 1 stick, 2 sticks, 3 sticks, 4 sticks, different locations), different motherboard, different CPU, tested the parts outside the case and inside the case, and flashing the BIOS. After testing, it turned out that the motherboard and CPU were both dead. If you have a friend in the area who has a similar build, ask if you can test your parts on his/her PC. Bring it to a local computer shop if you have to check as well.

Edit: Here's the link to the thread for my problem before. It might help.
 
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So I had the chance to test another PSU, had the same issue I encountered with the other one, shutting down of the motherboard less than 1 second after powering the system up. So I guess the PSU is not the problem, maybe the CPU is faulty. In this case , what can I do ?
 
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CAPSLOCKSTUCK

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Pick your board up and give it a sniff, if any part is fried you will smell it, my bet is still a faulty/cooked BIOS chip.
 
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Pick your board up and give it a sniff, if any part is fried you will smell it, my bet is still a faulty/cooked BIOS chip.
It doesn't smell fried at all. It smells neutral, like "regular hardware".
 
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You've had the computer for 3 weeks but never had a problem until you cleaned the cpu. If that's the only difference between it working, and not working, I guess you killed the mobo cpu socket or the cpu itself. No way of knowing until you get working parts and test. I hope you figure it out. Not sure why 3 week old paste needed redoing in the first place.
 
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Not sure why 3 week old paste needed redoing in the first place.
It was pre applied thermal paste from the waterblock, I wanted to see if the temperatures would have been better with MX-4. The result wasn't exactly what I expected. :(
 
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It was pre applied thermal paste from the waterblock, I wanted to see if the temperatures would have been better with MX-4. The result wasn't exactly what I expected. :(
Did you see my post regarding the vrms? I thouht I quoted you but seems I didn't.

If the board only stays powered on with the 12v cpu plug removed there's a good chance the vrms are cooked. They need a power good message from the cpu. If you follow the link to legit reviews and read the article you can see that particular board a fault where vrm ocp wasn't working, consequently killing the cpu power on module.

Looks like the initial cause was PSU overcurrent, which would go hand in hand with the JohnnyGuru test resulrs
 
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It was pre applied thermal paste from the waterblock, I wanted to see if the temperatures would have been better with MX-4. The result wasn't exactly what I expected. :(
I can't see how changing thermal paste can kill a CPU unless you removed it completely from the system and damaged it somehow or bent a pin on the Motherboard.
Personally I find it quick and easy to remove the cooler and change the paste without removing the CPU.
as mentioned, it can be damaged VRM's, but I would check the pins on the board if you removed the CPU.
 
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The best way to know which part is dead is to get/borrow working parts and test. You can try to RMA both the CPU and motherboard as well. RMA with Intel (based on my experience) is hassle free although RMA with ASUS (based on my experience) is a PITA. I hope you can borrow working parts to test your system on.
 
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00 on the Q codes of an ASUS mother board=corrupted bios. Here's a link with how 2 instructions.
http://event.asus.com/2012/mb/USB_BIOS_Flashback_GUIDE/
You know, while I'm reluctant to think that's the case, USB FlashBack does let you flash the BIOS without a working CPU or DRAM. It may be a good idea just to flash the latest BIOS just to rule it out. The times I've had a bad BIOS, the board would usually hang, not shut back off, but it's something worth exploring. Good catch.
 
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Thanks all, I will try the bios flashback and report results.
 
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I tried with the cpu and ram connected, it didn't work. So I got everything out and tried with the 24 pin cable only , and it still didn't work. I encountered this problem
  1. If the light flashes for five seconds and turns stable, USB BIOS Flashback is not operating properly. This may be caused by improper installation of the portable storage device, an error in the file name, or incompatibility in file formats. If this is the case, restart the system until the light clears, and check the file name and format.
I tried a USB2 and USB3 key, obviously with the dedicated BIOS flashback port, with the right file name, in vain.
I really don't think what else I could do now... :(
 
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RMA the parts if you're don't have or can't borrow a spare motherboard/CPU to test.
 
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I tried with the cpu and ram connected, it didn't work. So I got everything out and tried with the 24 pin cable only , and it still didn't work. I encountered this problem
I tried a USB2 and USB3 key, obviously with the dedicated BIOS flashback port, with the right file name, in vain.
I really don't think what else I could do now... :(

Did u read the legitreviews article I linked to earlier?

http://www.legitreviews.com/intel-x99-motherboard-goes-up-in-smoke-for-reasons-unknown_150008

Exactly what you've described, to a T. :) OCP failed and the vrm's along with the CPU were fried. Either vrm ocp or psu ocp but prob vrm since same chipset.





 
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I can't see how changing thermal paste can kill a CPU unless you removed it completely from the system and damaged it somehow or bent a pin on the Motherboard.
I agree. If you left the CPU in its socket, that would protect the pins from physical damage. Plus the CPU would be less susceptible to ESD damage. I say less but not immune. You still need to take necessary ESD precautions by unplugging the computer from the wall and touching bare metal of the case interior to discharge any static in your body and put you and the CPU/computer "at the same potential".

I would try one stick of RAM at a time and see what happens.
 
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I agree. If you left the CPU in its socket, that would protect the pins from physical damage. Plus the CPU would be less susceptible to ESD damage. I say less but not immune. You still need to take necessary ESD precautions by unplugging the computer from the wall and touching bare metal of the case interior to discharge any static in your body and put you and the CPU/computer "at the same potential".

I would try one stick of RAM at a time and see what happens.
I did all that. Thanks anyway.
 
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