Asus Z87 PRO Won't Boot

[Slumy__57]

So I've been having problems with my motherboard for some time now. I got it from a co-worker a few months ago, because he said it was broken and wouldn't boot. I eventually got it working, and the entire system was functional for awhile. The problem started occurring again a while later, and I ended up replacing the PSU, which seemed to fix it for awhile, but now it is refusing to boot again.

Here is what I know about the issue: It only happens after there is a full loss of power from the PSU, aka, unplugging it, turning off PSU switch, power outage. Before the power loss, everything functions perfectly normal, I can turn the pc on and off without any problems, and everything works perfectly. After power loss, the only reaction I can get from the PC is the red light indicating that the motherboard is receiving power.

For awhile, I found that by holding down the power button on the front I/O panel while turning on the PSU, I could "trick" the system into booting, and after that initial boot, it would work great until I unplugged it again. Last night, when I unplugged my PC to bring it to a LAN party, this trick didn't work, and I was completely unable to get it to boot.

I know this problem is not PSU related, so please don't suggest that, I have tried about 5 different working HIGH QUALITY PSU's in it, and nothing fixed it. My suspicion is that ASUS has some sort of protection in place against power losses, and it disables booting for awhile after loss of power, or something of the like. However, I suppose it could also just be a finicky motherboard, and I have given some thought to replacing it.

Thanks in advance everyone!

 

[Eximo]

Have you tried replacing the CMOS battery?

Have you tried re-flashing the BIOS? You can load an older one in, and then replace it again, maybe. I've had varying results some boards will recognize an older file, though you can rename them sometimes to trick them.

ASUS boards do have a behavior, particularly when overclocked, about startup after power loss. They will briefly boot, check the last power state, shut off, then restart properly.

There are settings related to behavior after power loss that you should consider fiddling with.

 

[junkeymonkey]

is the motherboard in the same case from your buddy or you just got the board and put it in a new case ??

if in the same case from your buddy I would first check the card switch to see if it was not bad by ''jump starting the board ''

https://www.youtube.com/watch?v=G4FOBL1c3pA

may try some of these as well ?

http://www.tomshardware.com/answers/id-2150559/asus-z87-pro-edition-motherboard-post.html

http://www.tomshardware.com/answers/id-1991211/asus-z87-pro-problems-post-boot.html

http://www.tomshardware.com/answers/id-2459224/asus-z87-pro-red-power-led-power.html

 

[Slumy__57]

I have tried a new CMOS battery, and I have tried flashing bios through every method I know. I really don't think it can be anything other than something Asus does with their boards in regards to power failure. My plan as of now is to mess around with a few power loss settings in bios and see what happens.

Yes, this motherboard is from the same case, I have tried shorting the power button pins with a screwdriver, and that didn't work. And as far as the other threads, I've already religiously gone through the TH troubleshooting checklist several times, and to no avail. Which again, leads me to believe this is something Asus does with their boards. Additionally, like I said, as soon as I get that initial boot, it works like a charm, so I'm reluctant to think that it could be a dead motherboard.

 

[junkeymonkey]

well could be just one of them lemon thing we all get from time to time ?? I ditched asus , my ''last'' 3 were my last .. seems more on hype then on quality these days

 

[Slumy__57]

Yeah, that is my current suspicion, I just tried changing a few of the power settings in BIOS because I read on another thread that that helped in a similar situation, but it didn't work.

 

[junkeymonkey]

let me ask ? when you say boot do you mean to desktop or it don't post at all [cant even get to bios and shuts down ?] I would try to remove all the hardware not needed to pots in to bios . if it starts up and goes to bios like normal the I would try a optical drive and get a live dvd of Linux to boot to it

arte you also using a refersh hawsell cpu ? asus bios flashing for them newer cpu's is real funny and a bit of hoop jumping its not like you can do a normal bios flash [read all the bios updates foot notes ]

like

''3. Before using the new Intel 4th Gen Core processors, we suggest that you first update the BIOS using USB BIOS flashback, or download the BIOS updater for new Intel 4th Gen Core Processors and then update the BIOS using it. ''

quite a few run in to this deal and fail

I guess you could go as far as stripping it all back down and start adding the parts back like first time building it to reinspect everything as you go ?

or cut your losses and find a nice z97 and hope it was the board and not a hardware or software / bios issue

id un hook all you can hardware wise and give this a shot? if its a boot isse and not post issue maybe hard drive / os related

''You can download the Linux Mint operating system for free. It comes as an ISO file
which you need to burn to a blank DVD. The liveDVD is then bootable and provides a
fully-functional operating system which you can try without affecting your PC''

https://www.linuxmint.com/documentation/user-guide/Cinnamon/english_18.0.pdf