Ryzen 1700x PC stopped working and won't POST

[steviemaximum]

Hi guys. I built a PC in May of this year, which had been working fine until a few days ago. I left it on while I went out, and when I came back a few hours later, the PC was off. I tried booting it back up, and the fans came on and the mobo lit up, but there was no POST. The light on my backlit mouse came on for half a second and then went out. On the MSI mobo, the EZ Debug LED for CPU came on for five seconds, then went out for around ten, then came on for another five, and so on.

I figured the problem was either the PSU, mobo, or CPU. The PSU seems to be fine, as I used a multimeter to find that all the voltages were good in the connectors. I then got a replacement mobo (same model) at MicroCenter, and I'm having the exact same issue. I've tried breadboarding, clearing the CMOS, and testing with one RAM stick in each slot, with no success. Everything seems to point to the CPU being the problem, but I've read that CPU failure is extremely rare.

According to the Ryzen Master app, my temps were around 50-65 degrees Celsius while idle, but apparently it reports temps as being 20 degrees higher than they actually are, so my temps were actually less. Also, not sure if this is CPU-related, but I noticed that randomly, applications (whether it be Chrome or Skyrim or whatever) would completely freeze for like 10-20 seconds and then function as normal.

Any help would be greatly appreciated.

My parts:

Motherboard: MSI X370 Gaming Pro Carbon

CPU: AMD Ryzen 7 1700x

CPU cooler: Noctua NH-L9x65 SE-AM4

RAM: G.SKILL 16GB (2 x 8GB) Ripjaws V Series DDR4 PC4-19200 2400MHz

GPU: Gigabyte GeForce GTX 1060 WINDFORCE OC 6G

SSD: PNY 240GB CS1111 internal 2.5 inch SATA III Value Solid State Drive

 

PSU: EVGA 700 B1 100-B1-0700-K1 80+ BRONZE

Case: IN WIN GT1 White SECC Steel ATX Mid Tower

[Changis]

why did you get a replacement motherboard? did you buy a new one? was there something else wrong with it?
your second motherboard has never been able to post?

[steviemaximum]

9 hours ago, Changis said:

why did you get a replacement motherboard? did you buy a new one? was there something else wrong with it?
your second motherboard has never been able to post?

I got a new motherboard because I figured that it was causing the problem, as well as that I was able to get one for free. But apparently the motherboard wasn't the problem because nothing changed; it didn't POST and I got the same LED error code.

[Fardin]

is there anyway you can check the cpu in some other pc? what psu you are using? 

[steviemaximum]

6 hours ago, Fardin said:

is there anyway you can check the cpu in some other pc? what psu you are using? 

Shoot, I forgot to put the PSU in the OP! It's the EVGA 700B Bronze.

 

I don't have another AM4-based PC I can use, unfortunately. Is there somewhere I could bring the CPU and have them test it on an AM4 board?

[Fardin]

5 hours ago, steviemaximum said:

Shoot, I forgot to put the PSU in the OP! It's the EVGA 700B Bronze.

 

I don't have another AM4-based PC I can use, unfortunately. Is there somewhere I could bring the CPU and have them test it on an AM4 board?

your psu watt is overkill but certainly its not the best unit, its okay as you said you tested it's fine, but please check it again. i did have a similar experience before, my pc would freeze & slow down for few sec. then suddenly started no more booting/post. then it would turn on & work fine for a day, but once shut down it wouldn't turn on again til a day or two day gap lol. anyway it turned out to be psu that sometimes would work & sometimes not but i had to change board too. as for cpu testing, try any local shop you have around your place.  second thought, as ryzen dont have integrated graphics, make sure your graphics card is working well too, cause there would be no signal in display if the graphic card messed up afaik.