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ASUS Support Home Location : Forum > Motherboard > P8Z77-V PRO  
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  Topic : [Problem]P8Z77-V PRO Won't boot New Topic
Eric
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From: Australia
Posted:8/23/2012 12:01:00 PM # 1

A few weeks ago I upgraded my PC. I installed a new ASUS P8Z77-V Pro, GTX 670, Some G.Skills RAM (2 x 4GB), a Samsung SSD (O/S) and an intel i7 3770K.

Two nights ago I got home from work and found that the power button is not having any affect. I hit the power button, nothing lights up, no fans spin up, no sound from drives (I have 5 other drives that should spin up) etc - nothing.

The Power LED on the motherboard is on (Green). None of the component warning LEDs are flashing or lighting up.

Twice during the past two weeks I experienced the motherboard to go to sleep and not wake up unless I completely unplugged the PC from my mains power. I don't know if this is related. After the second sleep I disabled the hard drive from ever going to sleep in control panel, as I thought it might have been some new symptom of using a SSD for the O/S drive - this is my first time using a SSD.

I am fairly certain that I shut the PC down last thing before this happened, although I won't say 100% that I didn't hit 'hibernate' by mistake.

Since getting this board I haven't touched the BIOS. I have to check the board revision when I get home before I can tell you what BIOS came with it. All BIOS settings and mainboard switches (TPU EPU etc) are still default.



Troubleshooting steps I have undertaken are:

First I thought it might be a power supply issue, even though the motherboard is still lighting up the power LED green. Last night I bought a new silverstone 750W PSU (Strider Plus) and plugged it in. I'm getting no change with the new PSU.

I've checked all connections - both the 24 pin and 8 pin power cables are plugged in.

I've reset the CMOS jumpers - moved from 1-2 to 2-3 - and then back again - I've done this four or five times.

I've taken out the CMOS battery for 15 seconds - I've done this three times.

I took an old power switch out of an old PC that was in pieces in my bedroom cupboard and tryed it instead of the case power switch. No change.

I unplugged everything except for the CPU and ram and tried to power it on - no change. I also reseated the RAM into the second channell slot/pair (as per the manual). these are the same slots I have had them in.

I tried the USB flashback with the latest BIOS from the ASUS web site. The flashback LED does not start blinking when holding the button down. I thought I'd give this a go as the manual says it works on standbye power.




Since installing this motherboard, the front power light has not worked. When I opened up my PC the other night I found that the power LED connectors looked like they were half off. I've pushed the on properly and I'm not getting anything on the LED but I can't say if this would work properly, as it wasn't before.

I'm wondering if the board could be stuck in some kind of sleep state. Does anyone know of any way to wake it up if it is stuck?

Could the CMOS battery be flat/cuasing these issues?

Does anyone else have any ideas what to test? I'm not sure if it is the motherboard that is having issues.

Cheers

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Ulrich
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From: United States
Posted:8/23/2012 1:14:00 PM # 2
Hi Eric..

Are you using the Q-Connector.. or is the front case wiring connected directly to the pins on the system panel connector...?

Have you had any significant electrical storms in your area recently...?

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There are 10 kinds of people in the World...Those who understand binary, and those who dont!
Saltgrass
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From: United States
Posted:8/23/2012 1:26:00 PM # 3
I assume the system has onboard video?  Have you tried removing the 670?

I seem to remember some comments about a bios update that helped with a problem with a GTX 680, I believe, but I can't find it right now.

Have you tried changing the place where the unit is plugged in?  Is it plugged into a UPS?

What's that other trick, that I think they use to reset the bios..unplug and hold down the power button?

Does your system have a reset button, and is the connection good on it?

But I would think, if it wasn't powering on at all, that the power check was not good so power is not being allowed.  If you have a new power supply, then it might be the board.

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X99-Pro i7 5930k, Z87-Expert i7 4771, Nvidia GTX 680 (2) Win 7/8/10
Eric
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From: Australia
Posted:8/23/2012 1:45:00 PM # 4

Hi Ulrich

 

I'm using the Q Connector. Do you think I should try without it?

 

I also don't think there have been any electrical storms. My alarm clock wasn't flashing or anything when I got home (no power outages).

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Ulrich
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From: United States
Posted:8/23/2012 1:49:00 PM # 5
Hi Eric..

Yes...  remove it and carefully make the wiring connections directly to the system panel connector... 

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There are 10 kinds of people in the World...Those who understand binary, and those who dont!
Eric
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From: Australia
Posted:8/23/2012 1:48:00 PM # 6

Quote:
Author: Saltgrass Posted: 8/23/2012 1:26:00 PM

I assume the system has onboard video?  Have you tried removing the 670?

I seem to remember some comments about a bios update that helped with a problem with a GTX 680, I believe, but I can't find it right now.

Have you tried changing the place where the unit is plugged in?  Is it plugged into a UPS?

What's that other trick, that I think they use to reset the bios..unplug and hold down the power button?

Does your system have a reset button, and is the connection good on it?

But I would think, if it wasn't powering on at all, that the power check was not good so power is not being allowed.  If you have a new power supply, then it might be the board.

Hi Saltgrass

I have tried without the NVIDIA card - to test the onboard graphics - no luck.

I tried a few other sockets on the same power board - that is powering four or five other applicnes - butI'll try another wall socket in the next room tonight. No UPS but the power board does have surge protection.

My case does have a reset button - it was working before this - now not making any difference.

I also tried the unplug and hold down power button to clear the caps but it doesn't seem to clear them - the board LED stays on.

Maybe I should try shorting the power switch pins just in case the spare switch I used was also dodge. Is it safe to touch them together with a screwdriver head?

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HHC
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From: TAIWAN, R.O.C.
Posted:9/4/2012 4:37:00 PM # 7
Sure, touching the two power pins does the exact same thing as the power button. By the way, the cause to the USB BIOS Flashback mulfunction could be related to ErP Support settings. Once that is enabled, the standby power will be cut to minimal, delivering no power to the embedded controller that does the USB BIOS Flashback function, which disables this function as the result.

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