Question Is my cpu dead?

[Jabrow20]

Hello,
First of all, not a pc expert so sorry in advance. I've owned the following system 2.5 yrs and never had issues but today it will not power up:

Intel core i7 6700k skylake
Gigabyte g1 ga-z170x-gaming 7 lga 1151 mobo
Samsung 950 pro m.2 ssd
Noctua nh-d15 sso2 d type cpu cooler
Zotac GeForce gtx 1050 ti mini
Evga supernova 80+ gold 750w modular psu
G skill ripjaws v series 16gb ddr4 ram

When I hit the power button, all my fans spin (psu, gpu, cpu, case fans) for about 2 seconds then everything shuts off. A signal is never sent to my monitor, I can't reach bios. I've tried reset button and cmos button on motherboard, but still get the same results. The debug led that shows boot codes on my motherboard shows a few codes very briefly: c1, c2, c3, c4, c5 and then 19 then shuts off. There is no beeping at all. Motherboard manual says that code 19 is "pre memory South Bridge initialization started". This is hard for me to debug, I'm used to an actual error code. I tried removing heatsink and cleaning then reapplying thermal paste as I was afraid that could be an issue. But alas, same results. I took the cpu fan off again and I'm not sure if the thermal paste looks OK? This is how it has looked both times, to me it looks like the fan was on too tight and squeezed everything out to the sides, but idk. Any thoughts? Thanks!

https://imgur.com/a/8MGR5ha

View: http://imgur.com/a/8MGR5ha

 

[jeremyj_83]

I highly doubt it is a CPU problem since you cannot even get into the BIOS. This would more likely being either a dead PSU or motherboard or both of them.

 

[scout_03]

could you remove the gpu and plug monitor to hdmi or the display port .

 

[jay32267]

My thoughts are that the motherboard would be my number one suspect.
I don't see anything wrong with that CPU.
....as far as paste coming out the sides.....it sounds like you used a little too much....but that doesn't matter as long as it didn't get on anything conductive....and many pastes are non conductive....so even that wouldn't matter much.

 

[Jabrow20]

could you remove the gpu and plug monitor to hdmi or the display port .

Tried and same results. Ty for the input!

 

[Jabrow20]

My thoughts are that the motherboard would be my number one suspect.
I don't see anything wrong with that CPU.
....as far as paste coming out the sides.....it sounds like you used a little too much....but that doesn't matter as long as it didn't get on anything conductive....and many pastes are non conductive....so even that wouldn't matter much.

Thanks for your reply! I'm a bit relieved the cpu seems less likely the problem. I thought that both my motherboard and psu were highly reliable so that's kind of a bummer. Is there any other test I can try to check psu and motherboard (unfortunately I don't have extra psu or motherboard around to substitute in)? Do you think there any chance gigabyte will replace my motherboard 2.5 yrs out?

 

[scout_03]

the other option is to have cpu and board test on there own in a shop look like a board issue .

 

[jeremyj_83]

https://www.amazon.com/Optimal-Shop...ocphy=9018702&hvtargid=pla-350408071424&psc=1 this would allow you to test your PSU. While the motherboard and PSU might be very reliable, all you need is a surge into the PSU and it go out and take other components with it, sometimes the whole computer.

 

[jay32267]

Thanks for your reply! I'm a bit relieved the cpu seems less likely the problem. I thought that both my motherboard and psu were highly reliable so that's kind of a bummer. Is there any other test I can try to check psu and motherboard (unfortunately I don't have extra psu or motherboard around to substitute in)? Do you think there any chance gigabyte will replace my motherboard 2.5 yrs out?

I find that motherboards fail a lot more than CPUs in my world.

....as far as what to do....I'm seeing them for $66 on EBay.

I buy used electronics from EBay a lot for my job and I have very good luck with EBay.

 

[Jabrow20]

https://www.amazon.com/Optimal-Shop...ocphy=9018702&hvtargid=pla-350408071424&psc=1 this would allow you to test your PSU. While the motherboard and PSU might be very reliable, all you need is a surge into the PSU and it go out and take other components with it, sometimes the whole computer.

Thanks for sending this my way. I bought the tester and conducted the test, psu has passed inspection. Next step, ordering a replacement motherboard.

 

[Jabrow20]

I find that motherboards fail a lot more than CPUs in my world.

....as far as what to do....I'm seeing them for $66 on EBay.

I buy used electronics from EBay a lot for my job and I have very good luck with EBay.

looks like you were right - replaced motherboard and i have a working pc again

 

[jay32267]

looks like you were right - replaced motherboard and i have a working pc again

That's great.

 

[geofelt]

Intel processors rarely fail.
A common source of problem is a bent pin in the cpu socket.
Since your problem happened before you reseated the processor, the pins were likely ok at the time of failure.

Double check that all PSU cables are fully inserted properly.
Sometimes a loose cable can cause your symptoms.

What is the make/model of your PSU?
If you can test with a known good psu, that would be a good thing to do.

I would concur that the most likely thing to have failed would be the motherboard.