Did i fry my cpu? Asus ROG VIII Formula, good psu, good mobo. Cpu fried?

Bobsiee · Sep 20, 2016

Hi everyone!

First time builder here!(And idiot). Looking to confirm my conclusion.

Had my new system up and running for a whole day, before my stupidity took hold.
In the process of installing a led strip i accidentally plugged one end of the strip into a molex (and forgot about it) and the other into my motherboards ROG Ext(Usb header?). I know, wrong header, should have been RGB header.

Started the system, heard a zap, promptly turned system off.

I assumed i had just sent 12v of kick ass straight into the ROG ext header on the motherboard.

The problem:
- The result is a system that now shows q code: 00 and won't boot.
- Cpu fan, cpu opt, and pump header are still working.
- No case fan headers are working.
- No power to usb ports, though i'm still able to blind flash my bios for some odd reason.
- All mobo lights are working.
- Cpu watercooler pump starts fine.

Testing done:
So the process of breadboarding the system on the box it came in commenced.
Things done:
- 8 pin cpu connector properly seated(Yes)
- 24 pin connector properly seated(yes)
- Blind flashed bios(no dice)
- Cleared cmos (With button and pulling cr battery out for 48 hours).
- All ram sticks in all positions.
- Lm2 (no difference)
- No broken slot pins.
- Tested my psu on another system(all good).
- Tested other systems psu with mine(problem persist).
- Checked that cpu cooler was not over tightened(no difference).
- With and without gpu installed(No difference).
- All precautions with static electricity done.

At this point i assumed i had fried my motherboard.
i went out and acquired another board of the same type.
Alas, the problem still persist, no change whatsoever.

After tinkering for a days, i have come to the conclusion that my cpu is in fact dead, although no burn marks are visible on the cpu or any pins.

Is my conclusion sound?
Done my homework?
Cpu failure seems like the only option here, right?

System specs:

- Cpu: Intel 6700k
- Motherboard: Asus ROG VIII Formula.
- Psu: EVGA supernova 850w.
- Ram: 2x8gb Corsair Dominator 3200mhz
- Gpu: EVGA 1080 ftw.
- Cooler: Corsair H100I V2.

All input appreciated!
Thanks in advance!

- Robert

helpstar · Sep 20, 2016

cpu socket pins of the motherboard bent?
try without ram, sata devices

just cpu, cooler, power supply
which code is coming up?

Bobsiee · Sep 20, 2016

helpstar :

Hi Helptar!
Thank you for the reply!

No bent pins on either of the two motherboards.
Have tried without ram and with ram in all configurations, still nothing.

The problem persist while running only cpu, cooler and power supply.
Q code 00.

Forgot to mention, it does not cycle through q codes at all, no matter what. Just a solid 00 whenever i power on.

- Robert

synphul · Sep 20, 2016

I'm wondering if it's not the motherboard, quite a few people have run into that code 00 issue and fail to boot. Can't imagine they're all dead cpu's. Something else if you haven't tried it, try removing the cmos battery again. This time make sure the psu is switched off and physically unplug the cable from the back of the psu. It won't take 48hrs or anything that extreme, 15min should be more than plenty. Reinsert the battery then plug the psu back in and try turning it on.

I'm not sure why but I've had it happen to me once or twice where removing the cmos battery wasn't working until I unplugged the psu as well. It may not solve anything but you're not out anything trying it. I guess it's possible that plugging the led strip in that way backfed some power into the board though not sure exactly what may or may not have been affected. Never a good idea to plug/unplug things while the system is live.

Do you have a way to test your cpu with a different board? Maybe take the cpu to a shop if possible and see if they can test it on a known good board to verify if the cpu is dead. If it's something quirky with the motherboard (may be more than one, maybe that line/model/brand) replacing the cpu may not help if there's nothing wrong with it.

Not sure if it's worth noting, just reading through some user reviews off newegg (which I take with a large grain of salt). For a motherboard that costs nearly $400 it's not exactly getting stellar reviews from people, boot issues, poor overclocking according to 2 people who said they used the same cpu and better results in other model boards, one got a board with mismatched ram slots. At the very least quality control seems a bit iffy, idk. Maybe there was a bad batch of boards (it happens with any product).

If you rma your cpu and all works well, great. If you rma the cpu and still run into issues it might be worth considering returning the board and getting a different mobo entirely, not just a replacement of the same exact thing.

helpstar · Sep 20, 2016

while breadboarding, is the motherboard on a non conducting surface like wood or card box? Don´t use packaging like ESD foils,...

Bobsiee · Sep 20, 2016

synphul :

I'm wondering if it's not the motherboard, quite a few people have run into that code 00 issue and fail to boot. Can't imagine they're all dead cpu's. Something else if you haven't tried it, try removing the cmos battery again. This time make sure the psu is switched off and physically unplug the cable from the back of the psu. It won't take 48hrs or anything that extreme, 15min should be more than plenty. Reinsert the battery then plug the psu back in and try turning it on.

I'm not sure why but I've had it happen to me once or twice where removing the cmos battery wasn't working until I unplugged the psu as well. It may not solve anything but you're not out anything trying it. I guess it's possible that plugging the led strip in that way backfed some power into the board though not sure exactly what may or may not have been affected. Never a good idea to plug/unplug things while the system is live.

Do you have a way to test your cpu with a different board? Maybe take the cpu to a shop if possible and see if they can test it on a known good board to verify if the cpu is dead. If it's something quirky with the motherboard (may be more than one, maybe that line/model/brand) replacing the cpu may not help if there's nothing wrong with it.

Not sure if it's worth noting, just reading through some user reviews off newegg (which I take with a large grain of salt). For a motherboard that costs nearly $400 it's not exactly getting stellar reviews from people, boot issues, poor overclocking according to 2 people who said they used the same cpu and better results in other model boards, one got a board with mismatched ram slots. At the very least quality control seems a bit iffy, idk. Maybe there was a bad batch of boards (it happens with any product).

If you rma your cpu and all works well, great. If you rma the cpu and still run into issues it might be worth considering returning the board and getting a different mobo entirely, not just a replacement of the same exact thing.

Hi Synphul!

Thank you!

That sounds like a plan! Will give it a shot and post results.

I have a workshop in town that specializes in pc repairs, i'll give them a call right away and try to get the cpu tested there. Afraid i don't have any spare boards lying around, except for these 2.

In afterthought the my selection of motherboard may have been better, first time builder just going for what looks cool and not using using my common sense. Oh well, live and learn!

- Robert

Bobsiee · Sep 20, 2016

helpstar :

Hi Helpstar!

Currently using cardboard box that the motherboard came in, so no conductive surfaces!
I am also grounded via a antistatic wristband.

- Robert

helpstar · Sep 20, 2016

check if the cpu itself looks a bit like this:
https://tse3.mm.bing.net/th?id=OIP.M6b5189a959e48c9867cf7cead3629f4eo0&pid=15.1

MasterMace · Sep 20, 2016

1. Reseat the CPU
If it's still not working, you heard a zap - the CPU is likely fried. 00 means CPU not detected.

*edit* you already tested the PSU working good.

Bobsiee · Sep 20, 2016

helpstar :

MasterMace :

Hi MasterMace!

Thank you for the reply!

I have reseated the cpu and applied new thermal paste.
I did indeed hear a zap, cpu looks good from visual inspections but looks can deceive.

Helpstar:
No, my cpu does not look like that fortunately!

Have done what Synphul suggested.
Removing armor plate to get to cmos battery, disconnecting power completely and leaving the battery off for 15 min.
Still no dice.

I called the workshop, they will receive my cpu for testing tomorrow, i will post results when they are done!

At this point i hope they find the cpu fried, as i will know for sure. This troubleshooting thing really is exhausting!

- Robert

Bobsiee · Sep 21, 2016

Hi everyone!

Went to the workshop this morning.
They confirmed that the cpu was in fact fried.
Bought a new cpu and computer now boots.
Everything is okay again!

Hope this helps someone else in trouble.

Thanks everyone for he help!

synphul · Sep 21, 2016

Unfortunate to hear it was the cpu that fried but glad you got it solved. Looks can be deceiving like you said and there's not always a visual cue that something's toast internally. Many people don't have a bunch of extra parts laying around to troubleshoot which can make it rather difficult.

I wasn't implying you chose a bad board, asus is usually a solid brand. It's possible to get a bad product or even a couple depending if there was a one off issue, bad batch or something. Definitely a nice looking board.

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