ASUS Sabertooth Z87 CPU won't power up

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DeanV

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Jul 4, 2013
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First time post, but not first time build, but last build was a few years back.

ASUS Sabertooth Z87
Intel i7-3770K haswell
32 GB G.Skill DDR3 1866 / F3-14900CL-10Q-32GBZL
ASUS GTX 670
Cosair TX850M power supply
Cosair case
Samsung 256 MB SATA SSD
2 TB SATA HD
ASUS SATA blue-ray drive

System is not booting – the CPU and fans are not powering up.

When I turn the power supply power on, the motherboard standby power LED lights up and the LEDs on the GTX 670 light up, but when I hit the power-on button, nothing happens – no other LEDs light up and neither the CPU cooler FAN nor the case fans start.

I started with all components connected, and slowly started disconnecting everything one-by-one, but it made no difference. I currently have only the motherboard power, CPU power, the front panel items (power on, power reset, HDD LED, system power LED) and CPU and case fans connected, and have a single 8GB DDR3 installed, but still only the standby power LED and no other activity. No keyboard or mouse is currently connected and I also swapped the remaining 8GB memory module with other 8 GB modules. The Cosair power supply has a secondary/optional CPU power cable and I also attached and tried that but it also made no difference.

Any ideas on how to proceed appreciated.
 
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Som3one

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Jun 13, 2013
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Well, that sure sounds like you covered and ruled out every possible issue. So, my guess is that your mainboard is indeed defective.
Stupid question, I know...but have (double)checked that all the cables are connected properly?

One last thing you could try is to try another PSU to rule this one out, too.

 
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DeanV

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Jul 4, 2013
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Sharp eyes -- that should have been Intel i7-4770K Haswell.

 
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DeanV

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Jul 4, 2013
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Thanks, I double (triple) checked the connections and the memory slot(s) in use. At the moment I only have the case/CPU fans, front panel connectors power supply connections in place. No bent pins anywhere. I tried an older Antec Truepower 2.0 PSU and had the exact same result. The Antec MB connection matched the Sabertooth MB connection, but the 12 V CPU power only a 4-pin so I was not sure on the validity of this test. But looks like an MB RMA at this point :-(
 
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Som3one

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Sure looks like it. Unfortunately.

I mean, the motherboard´s LEDs should let you know if there is something wrong with your installed components. But since that doesn´t happen and you ruled out the PSU (probably ^^)...the motherboard is only thing left imo.


EDIT: One last idea is to remove the BIOS battery. Maybe there was a bad setting or something.
 
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DeanV

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That was a good tip, but no luck. I left the battery out for about 10 minutes or so and verified the battery voltage was okay, but after re-installing the battery the same MB behavior occurred.
----------------
I found a paper-clip PSU test on the Corsair site:
http://www.corsair.com/en/blog/testing-your-corsair-power-supply/
The fans I used powered up as called out in the test and I was getting 12 VDC reading off the CPU PSU pins. So looks pretty definitive on the MB being the problem.
 
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pineapples

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Jul 7, 2013
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I am having the same issue but on a ASUS Z87 Pro motherboard. Everything was working fine last night but this morning it just won't start up. Power cycling the PSU and then hitting the power button, gets the cpu fan to make a quarter turn but thats about it. Have you been able to resolve this issue ?

I have tried a barebones build with just the moho, cpu+fan, 1dimm ram and it still does not work. I have also cleared the cmos + removed the cmos battery still the same issue.
 
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Damidge69

Damidge69

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Aug 1, 2013
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Hi DeanV, Pineapples

Did you get this issue fixed ?
I am having the same issue with ASUS Z87 Deluxe motherboard.
So far :
2 Motherboards - same result
2 PSUs - same result
Barebones with just mobo, cpu+fan, 1 Dimm RAM also

CPU is Intel i7-4770k Haswell

Mobo power and reset lights come on with PSU startup.
When I try to power up mobo LEDs flash 0000, fan clicks a fraction - then silence. Power and Reset lights on mobo still on.
Tried removing CMOS battery - no change

 
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raja@asus

raja@asus

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Sep 28, 2011
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Place the board on a non-conductive surface, connect up are minimum components (keyboard, one HDD, one memory module etc), clear RTC (clear CMOS) and see if the board will power up. Make sure the clear CMOS jumper is in the right position as well. If the board does not power up:


1) Check the CPU socket for any bent pins.

2) Conact the PSU vendor and ensure your PSU is qualified of Haswell - some PSUs are not due to Haswell's low power consumption under certain conditions.


You can also try updating to the latest UEFI version using USB BIOS flashback with a FAT32 formatted flash disk and by naming the UEFI file accordingly (motherboard manual will show name).

-Raja
 
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lucy1974

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Sep 6, 2013
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Hi DeanV, Pineapples

Did you get this issue fixed ?
I am having the same issue with ASUS Z87 Deluxe motherboard.
So far :
2 Motherboards - same result
2 PSUs - same result
Barebones with just mobo, cpu+fan, 1 Dimm RAM also

CPU is Intel i7-4770k Haswell

Mobo power and reset lights come on with PSU startup.
When I try to power up mobo LEDs flash 0000, fan clicks a fraction - then silence. Power and Reset lights on mobo still on.
Tried removing CMOS battery - no change


Hi, I've experienced the same problem (Q code 0000). In my case, the HD was broken, I simply put another HD and the system worked fine. I have an i7-4770 CPU and a ASUS Z87 Deluxe MB. I hope it can be of some help for you. Bye Luciano
 
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Sari001

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Sep 11, 2013
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Dean,

I had the same problem. Z87, CPU i7 4770K. The Corsair RAM was in the tested list. No start up. Had Asus tech support walk we through the steps of testing the system. No solution and I am replacing both parts to NewEgg. Asus says the CPU and MB were compatible.

Where are you in this?

Ken
 
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Roger Rogers-1382392

Roger Rogers-1382392

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Aug 6, 2013
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I have the Sabertooth Z87 and I had to send the board back and got a replacement.

The problem was not the CPU but what looked like a perfectly fine CPU bed actually had a very slightly shifted pin, which took A MAGNIFYING GLASS to SEE.

There on the contacts was a tiny twist in one of the laying `pins`; maybe due to dropping the CPU in too quickly.
NOTE;-
THEY ARE VERY SENSITIVE and LITERALLY just lay there like short flattened gold hairs.

I changed the M/B and it all works perfect now.

Sorry to be the bearer of bad news; but USE A POWERFUL MAGNIFYING GLASS to check the M/B CPU contacts which are VERY DELICATE.

Nothing like my old AMD 64 socket. A brute could put one of them together..
 
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Shawn Roland

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Sep 13, 2013
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I am having the same issue also with pretty much same parts list Asus Z87 Deluxe, with Intel I7-3770K Haswell.

I have done some research and think I have narrowed down the problem but have been unable to find a solution.

Issue started after put together my computer everything worked fine, loaded up OS no problems. Left for about an hour came back and now it will not power on. See leds on MB but when I push the power button fans spin up for about a second and then dies. I tried a spare power supply and had the same issue. Figured it was either MB or CPU and RMA both. Got replacement parts and everything seemed to work fine. This is where I had a hunch come in and I when to power setting and selected sleep mode. As soon as sleep mode kicked in the computer turned off and exhibited the same issues again of not being able to power up.

After doing some research it seems that the Haswell chips have a unique sleep mode where they drawn very little power. This can make some PSU think that the machine is off and power down.

This is where I am stuck. I am not sure if I should try to get a power supply that supports the sleep mode of the new chips or what. I just can't understand how after going into sleep mode that the whole system would refuse to power on no mater what I have done. Any idea of how to kick it how of this sleep mode issue. I have tried pulling power to the MB, pulling battery and everything else I can try.

One oddity is that I can get my system to power on and stay on if I unplugged the 12v CPU power plug. Of course the system won't post but it does stay on. Curious to see if other in this thread have all the same symptoms.
 
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Som3one

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Hm...that starts to sound more and more like the problem I have:
http://www.tomshardware.co.uk/answers/id-1773762/major-issues-asus-z87-sabertooth-possibly-cpu.html

At first I thought it was because of an active, internal USB hub or because I connected the PSU (Corsair AX760i) to the USB port.
Then I undid both and it worked fine for about 2 weeks.

Then set everything to stock settings which didn´t make a difference. I then made sure all PSU cables were connected correctly and again, it worked fine for about 2 weeks.

Two days ago, it happended again. Then I replugged all power cables again and it´s been working since then.

My guess was that it actually is a problem with my PSU...but now I am not sure anymore after checking this thread, again.


@ Shawn Roland
I hope you meant "I7-4770K". ;)
 
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Roger Rogers-1382392

Roger Rogers-1382392

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After I felt CERTAIN and totally confident that my PC was running perfectly, then I updated the BIOS; and everything else.

DO NOT UPDATE your Bios until you are certain it is at a time when you are sure your Pc is running well.

Disconnect from the internet after you have downloaded the updates; so nothing interferes with the update (such as M/S auto-updates or auto-virus-scans etc).

There are like a dozen updates already for all the Sabertooth Z87 on-board components.

I have two HD7770`s running in CrossFire, and gaming is truly magnificent..

N.B.
Mine is the standard Asustek Sabertooth Z87 Bios, which is a complex treat (with around 15 updates); and probably not exactly the same as other Z87`s from other companies.
 
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Samourond30

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Oct 28, 2013
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Hello there!

I have the exact same problem, I turn the power on and you know the story, I was not on my computer today but it was already turn on, and so I arrive in front of my computer and he was turn off?!?!. After that,
its like he cannot turn on again, I try clear CMOS, try changing Ram of place, disconnect drive and sdd... remove graphic card...
nothing seem working or changing somethings.

Does anybody have something new on that? I read at some place that letting the power cord off for 8 hours and after it will start again? Maybe I will try that cuz for now I don't know what to do. I'm using the stock BIOS.. does there are problem with the stock BIOS?

Thanks in advance!
 
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agingcowboy

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May 8, 2014
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I see that this is an old thread, but I thought I would leave a reply anyway since I had a similar problem with this motherboard. After rebuilding my system twice with no resolution of the issue, I removed the motherboard from the case and reinstalled it. This may seem obvious to others, but I noticed the BIOS reset button on the back of this motherboard didn't line up quite right with the I/O shield provided. It needed to be raised up higher than the standoffs just a hair to line up properly. On initial installation I hadn't noticed this and the metal around this button was touching the metal case resulting in powered on LED's on mobo and graphics cards, but no response to power button. Once this was properly aligned system booted without issue. Maybe this isn't your problem, but it fixed my issue.
 
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MTRay

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May 12, 2014
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"I see that this is an old thread, ........"
I kind of used your advice and some else's. I figured after read on this for hours that the issues was that some power signal was not being held to the PSU(how and why I don't know yet). so completely removed the Motherboard, placed on electrical isolated surface using the mounting screws and stand off from the case. plugged in only the cpu; one 8gb memory; cpu fan;24pin atx power and 8pin cpu (EATX12V) power. still the same issue that has been plaguing us. after exhaust all other steps that did not require any more of cash I did the next that I got from another form(and he did get any earful for it to). I jumpered the green power on pin to ground... it worked kind of. as soon as turn the power on to the PSU the system booted, with the Q-code 0099 (super IO initialization, not surprising ). then I plugged in the monitor/keyboard/mouse to what was going... nothing(also not surprising). I booted the BOIS and nothing seemed out of order for having flash the bois a dozen times in every way I could think of and having no HDD/SSDs plugged in.

so jumpering the power on circuit--- problem [strike]fixed[/strike] ... bypassed. real problem is unknown but I suspect the physical circuitry on the motherboard its self that control maintaining power. to tired now to look any further.
 
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hcornea

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I have 2 Motherboards Z87 based that have done this:

One an Asus Z87-Pro and a mini-ITX Z87I-Pro
Each setup has a Corsair RM450 Power supply.

The problem appeared quite randomly after shutting down to install a DVD drive. As above, lights on but no power. Won't POST. That was on the Z87-Pro. After disconnecting everything from the PSU, the system managed to power up again, and has been running properly since.

Now the Z87I-Pro has started doing this, and I can not get it to work. Will try disconnecting the 12V CPU header and see if I can progress further or reset the process.

The BIOS and CMOS buttons on the rear of the MoBo are not fouling on anything. There is enormous clearance in this case Origen HTPC. On pressing power-on, and I can almost convince myself of a switching noise within the PSU ... but no life. Standby-power indicator on MoBo stays lit all the way through. The Sleep-State hypothesis seems quite likely to me, but I can not get past it.

Perhaps I just need a compatible PSU (which is none of the spares I have lying around)

**EDIT: Just found this: http://www.corsair.com/en-au/support/faqs/power-supplies on the Corsair Website (Down the bottom, regarding Haswell Compatibility with Corsair PSU) It sounds exactly like my problem.
 
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