Asus z87 Cold Start Problem

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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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Hello guys. I recently built a new pc:

- Asus Maximus VI Hero
- i7 4770k
- 2x4gb g.skill TridentX 2400Mhz cl11
- Life Psu 600w
- gtx 770
- corsair h80i
- windows 8.1 pro x64

I have a pretty annoying problem, every time I try to start this pc (from NEW) from cold, it wont...
The MB clearly receives power from the psu, start and reset buttons lits up as I turn it on and fans starts spinning for a second then stops.
If I turn off the psu, wait untill the start/reset lights(on the mb) turn off too, and then again turn on the psu, it will finally starts with an error and the bios memory cleared everytime I do this.
I thought it could try changing the cmos battery, I did it with no changes.
Then i tried to swap that "bad" psu with a new one, and I swapped it with a Corsair ax860w, now it's even worse.... It wont cold boot even on the second try, now it's totally random, it will start on the 6th-10th try (turning off-on the psu).

additional informations:
- I can reset it, no problem, but if shut down the system I'll have to do the "trick" again to start it.
- When I start it, using the "trick" above, fans start for 4 seconds, then stop roughly and start again with an error (goes to the bios/press F1)
- bios version: 1301

I also recorder it for a better understanding

YOUTUBE VIDEO

Can anyone please help me find the problem?

Update

I tried to swap the ram with another one, it still won't start, I'll rma the motherboard in a week.
 
Solution
raja@asus
No problem. Just bear in mind there is a wait time on the boards to power up when you get your next one (all that cycling without waiting cant have done the board or PSU much good).
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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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Thanks for your reply.
Yes, no changes at all... I'm also searching for a spare ddr3 stick to try, just in case. I could do a memtest too, but I'm pretty sure it will go fine, I'll let you know.

Once I manage to start the pc everything is smooth, so I'm starting to think that the motherboard is the only culprit.
 
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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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Yes I did it, I tried with both profile 1 and 2. Once I turn power off I won't be able to start the pc again.
 
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raja@asus

raja@asus

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Sep 28, 2011
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1) Which POST code does the board halt at when it won't POST from AC cycle?

2) Set the DRAM manually to DDR3-1333 and return the CPU to stcok just for a debug - let's see if you still get POST issues from AC cycle that way. If you do, we need to dig deeper. If you don't then some kind of OC related issue.

-Raja
 
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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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Tnx for your reply Raja. I'll try to be precise here... :)

1) I decided to record the motherboard with my iphone because I wasn't able to write down every single q-code. You can see by youself at minute 4:22

YOUTUBE VIDEO

2)Ram to ddr3-1333 and disabled "Multicore Enhancement", it didn't work, no changes at all... By the way, everytime I cold boot, I get a bios reset and the ram will be set to 1333 automatically by the motherboard.
 
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Maurizio Piromalli

Maurizio Piromalli

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I had to watch the video couple of times but here is what i got:

15 - 80 - 21 - 33 - 35 - 39 - 3E - 3A - 3b - 38 - 58 - 58 - 55 - 3b - 38 - 4F - 88 - 61 - 88 - 78 - 69 - 88 - 72 - 71 - 88 - b6 (for 2 seconds) - 79 - 00 - Stops for 3 seconds

Starts again - 00- 14 - 19 - 15 - 00 - 21 - 31 - 35 - 38 - 3A - 38 - 36 - 98 - 58 - 55 - 3b - 4F - 60 - 61 - 88 - 78 - 88 - 69 - 72 - 71 - 79 - 96 - b2 (bip) - 99 - 9C - b4 (3sec) - A2
 
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raja@asus

raja@asus

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Sep 28, 2011
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Hi,

1) I checked th video. Usually on these newer boards you have to wait around 3-4 seconds before pressing the power button after turning a PSU on. The PSU relays can take some time to pull up and the board start up sequencing is usually offset by about 2 seconds after pressing the power button on the board as well.. If you press the button immediately after powering up some of the ROG boards they won't power up. Same goes for if you don't wait a few seconds for the system to power up after pressing the button.


If you are waiting long enough and the board still does not power up then there is an issue with either the board or the PSU. You may need to RMA one or both. I'd take the board out of the case and try it on a non-conductive surface with bare minimum components first. THen you can decide if you want to RMA it and the power supply.


2) The board will return to failsafe defaults if the POST process was interrupted - in the video above the wait period between pressing the power button after AC power cycle and the speed at which you turn the PSU off could register a failed POST attempt which means the board will POST in safe mode when it does power up.

-Raja

 
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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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Well... I didn't know that but totally makes sense to me, it could explain why it takes about 5 minutes to start everytime. I actually don't remember if I ever tried to wait before I push start.
Thank you very much, I'll try it as soon as I can.
I also have this problem with a different PSU, I think we can exclude it.
 
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Maurizio Piromalli

Maurizio Piromalli

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Feb 15, 2014
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It's solved finally.

I don't know why but my motherboard came out without a cmos jumper(is that even possible? I know what it does, I didn't remove it for sure...), and it was so strange that I decided to buy one by myself. I was surprised as hell but it actually work!
The PC starts on the first try with an error, if I set the ram to XMP it will reboot straight to windows. Tnx a lot for all your answers.
 
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