PC started turning off randomly, now board seems? dead

[PotatoesOnMyLawn]

Hey everyone, long time lurker but new poster here. I built my first PC back in summer 2017 and it worked with no problems until about a week ago when it started randomly turning off and rebooting. It started getting worse when it started to not reboot right away but instead would stay off for a random period of time (~15 mins) and then turn back on own its own. I tried reseating the 24 pin connector and it seemingly fixed it for a day until today, when it randomly shut off and wouldn't turn back on. No power light on mobo. I tried again on a spare psu to no avail. I tried both psus on a spare board and both lit the board up and passed a power supply tester, so I think the board just went bad, but I don't know what could have suddenly went wrong, so I am suspicious of my psu. For now I think I will rebuild the system with that spare board, but is that a bad idea?

 

Specs:

i7 7700k

Msi z270 a-pro (board that died)

Gigabyte GTX 1080 

Corsair h650M psu

Cryorig H7 cooler

32gb DDR4 2800

 

I have a z170 board from my brother's old system along with a Skylake chip to update the bios that I am going to rebuild my system with

[PotatoesOnMyLawn]

6 minutes ago, PotatoesOnMyLawn said:

Hey everyone, long time lurker but new poster here. I built my first PC back in summer 2017 and it worked with no problems until about a week ago when it started randomly turning off and rebooting. It started getting worse when it started to not reboot right away but instead would stay off for a random period of time (~15 mins) and then turn back on own its own. I tried reseating the 24 pin connector and it seemingly fixed it for a day until today, when it randomly shut off and wouldn't turn back on. No power light on mobo. I tried again on a spare psu to no avail. I tried both psus on a spare board and both lit the board up and passed a power supply tester, so I think the board just went bad, but I don't know what could have suddenly went wrong, so I am suspicious of my psu. For now I think I will rebuild the system with that spare board, but is that a bad idea?

 

Specs:

i7 7700k

Msi z270 a-pro (board that died)

Gigabyte GTX 1080 

Corsair h650M psu

Cryorig H7 cooler

32gb DDR4 2800

 

I have a z170 board from my brother's old system along with a Skylake chip to update the bios that I am going to rebuild my system with

Forgot to add: No errors or logs at all in Windows when this would happen

[bmx6454]

maybe if the psu surged, and cooked the mobo, but faulty board seems most likely. had an msi z170a sli plus that would just flash on and off, and boot sometimes, had a friend with an msi z270 board(maybe the same one, can't remember) that failed in pretty much the exact way you listed. both boards failed on their own with no psu issues, so anecdotal opinion, but i would say it's just the board.

[Helpful Tech Witch]

Check the power button. My 7400 build had what I thought was a dead MOBO, but the power button died.

[Guest]

I'd try a different psu...

[PotatoesOnMyLawn]

6 minutes ago, HelpfulTechWizard said:

Check the power button. My 7400 build had what I thought was a dead MOBO, but the power button died.

Unfortunately not, power button turns on my fans connected via molex

[PotatoesOnMyLawn]

6 minutes ago, ShrimpBrime said:

I'd try a different psu...

Tried new psu to no effect

 

[Guest]

Just now, PotatoesOnMyLawn said:

Tried new psu to no effect

 

Does increasing the v-core slightly help any?

[PotatoesOnMyLawn]

Just now, ShrimpBrime said:

Does increasing the v-core slightly help any?

It won't boot or respond at all anymore unfortunatley

[Guest]

Just now, PotatoesOnMyLawn said:

It won't boot or respond at all anymore unfortunatley

See if you can warranty the board.

[PotatoesOnMyLawn]

9 minutes ago, ShrimpBrime said:

See if you can warranty the board.

I will try, but I think its too old. Thanks for all the help though.

[Guest]

4 minutes ago, PotatoesOnMyLawn said:

I will try, but I think its too old. Thanks for all the help though.

Is the new PSU the one you listed? The hx650?

I'm asking cause it's not a very good unit. That's why I had suggested it.

 

Not sure on MSI warranty. Depends on region, but never hurts to try.