Asus P9X79 PRO wont boot Q code 00

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MrRadu

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Dec 7, 2013
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10,510
Hello,

I have just assembled the following components in a new build:
Motherboard: Asus P9X79 PRO
Processor: Intel Core i7 4930K
Graphic Card: Asus GTX 770 Nvidia GeForce
Memory: 1xCrucial 8GB DDR3 CL10 1866Mhz
SSD: Crucial M4 128GB
PSU: Corsair Proffesional HX 1050 Watt

I am not 100% sure but I think that there is a bent pin in the processor socket on the MOBO, this is how it came – I did not touched those pins.
The problem is that I cannot get into BIOS, nothing shows on the screen, basically the screen is not used – stays in standby.
When I am turning on the MOBO is powers for a few seconds (shows the Q code 00) then it turns off automatically for a few seconds and then turns on again and stays on.
When I power on the MOBO, a red LED turns on (CPU LED) on the bottom left corner of the processor and the Q code shows 00 (Not Used according to the Manual). The case does not have a speaker therefore there are no sounds.
I have done a lot of reading/research online and some say that Asus P9X79 PRO is not compatible with Intel Core i7 4930K but I have looked on ASUS website and is seems they are compatible:
http://www.asus.com/support/CPU/1/42/P9X79_PRO/C20130902153843/
I was not sure what version of bios the MOBO came with, therefore I did a USB BIOS Flashback to the latest version: P9X79 PRO BIOS 4502 from 31.10.2013 – still the same problem I cannot get into BIOS when I power on the MOBO.
I have tried to move the RAM memory to different slots – nothing changes.
I have tried to move the graphic card on different slots – nothing changes.
I have tried to switch on and off the EPU and TPU – nothing changes.
I have tried to clear the CMOS and MemOK – nothing changes.
I have tried to disconnect each component one at the time to see what – nothing changes. Only when I cut the power to the CPU the Q code turns off.
The screen is connected through a HDMI cable and I do not have different cables to test them at the moment.
Can you please let me know if there is anything you can think off that might cause this situation and/or how can I fix it?
 
Solution
raja@asus
You need to use a Fat32 fortmatted flash drive in the correct USB port AND the file needs to be renamed properly for the flash to work.

To find out which version of UEFI your board shipped with, take a look at the last 4 digits of the serial number.
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This is very nearly the exact same issue that i'm having now.

My hardware varies a bit, but the issue is the same, and i've done everything that you've listed as well.

Sorry that I can't help, but hopefully someone else can!




 
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You need to use a Fat32 fortmatted flash drive in the correct USB port AND the file needs to be renamed properly for the flash to work.

To find out which version of UEFI your board shipped with, take a look at the last 4 digits of the serial number.
 
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Solution
Hello,

Eventually I fixed the problem ...
The problem was that the version of the BIOS the MOBO came with was not recognizing the processor.
Apparently the first time I thought I did the BIOS update did't went well, therefore the BIOS was the same old version.
After experimenting a few more times I have managed to solve the problem and now I am typing from the above PC.

I hope this will help others that might experience the same issue.
 
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I have the same problem with an Asus P9X79WS mobo and 4930 CPU. I am now on mobo #2 (sent from Asus) and have changed out every other compoent (memory, graphics card, etc.). I've followed the BIOS USB update procedure closely but still get no boot (no post), no Q-codes. any ideas?

Bob
 
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Raja, the sticker by the power connector indicates a 3407 BIOS version. But I have USB-updated the BIOS with Asus newest version (4505) to no avail. I download the 4505 BIOS from the Asus web site and rename it P9X79WS.CAP, place it on the USB drive in the white colored USB connector, press & hold the BIOS button until it starts flashing. It takes a couple of minutes, flashes faster, then not at all. Isn't that the correct method of updating the BIOS?

 
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That sounds fine. It means the issue potentially lies elsewhere - CPU, PSU or memory perhaps. Try using a single memory module in one of the proper memory slots (manual will tell you which to use when only using one DIMM in a channel). Make sure the module latches on both sides of the slot as well.

 
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I have done that - used 1 stick of memory in B1 and another in D1. Tried Corsair Ares 2400Mhz DDR3 (which I intially put all 8 sticks in), then went and bought 2 sticks of PNY 1600Mhz DDR3 just to test with - same results. Also remember - I am on CPU number 2 - a replacement - and I am very careful about installation. Same result.

 
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Have you tried another PSU?

If you have, then the only thing I can sugest is RMAing the board to ASUS, and asking them to update UEFI for you before sending a new one (we can arrange a pretest if you are located in North America).

-Raja
 
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Thanks - I solved it - the auxiliary power cord (8 pin) was unattached. If it is not attached, there is not enough power for the CPU. Always something "simple"!

 
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Heh thats one of those things we expect users to attach - at the most by the time someone posts on the forums the most is usually a loose connection.Yes without that plugged in there is no power going to the CPU VRM, so it cannot power on. It's a mandatory connector on all modern platforms that consume a moderate amount of current or greater.
 
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