Question Computer only starts for one sec

[smileto82]

Hello everyone

I know there are other threads like this one. I have read a lot of them, but no solution helped me so far.

My problem:
When I press the power button the computer starts for one second. I see the cpu and power fan rotating for 1 sec. Then it goes out.

I already replaced each part. Thats why this problem confusing me this much.


On the first run I built all the parts in my little tower. Due this problem and to save time Im now testing the hardware outside of the case.


As the problem is showing up the first time I thought it could be the psu. It was an "old" bequiet psu. But it should support this motherboard. But ok, I bought a new one.
-But still the same problem.

After that the mainboard have been replaced (doa). New board, new psu and old cpu.
-But still the same problem.

Change of the cpu (also doa). New board, new psu and new cpu.
-But still the same problem.

I also tried to run the system without ram. It should start and get an ram error. But the system only starts for one sec.

So, what am I doing wrong??? All parts have been replaced... what else can it be?


About the hardware:
Asus H310M-HDV
Intel i5 CPU
2x8 GB Corsair Ram
Chieftec GPS-600A8 PSU

Thank You all 🙂

 

[nortonsars]

Something might be shorting out, make, sure your connections are all the way in and that nothings shorting out your mobo

 

[alexoiu]

What exact CPU?

 

[gn842a]

I hope you're not doing what I did. To address a problem with hang ups on booting and occasional unwanted shut downs, I decided to get a new PSU.

So I pulled the Thermal take out and put in the Seasonic. The thing is, I was a bit lazy. The modular cables from the thermal take were all installed on the peripherals and I said wotthehell a modular is a modular so rather than reach around and re-do all the SATA power connectors I just plugged them into the same ports on the new Seasonic.

And it booted for one second and turned off. The fans moved too.

And I tried it again a couple of times thinking what the????

And what had happened was that I had blown out Every. Single. Peripheral. The psu was OK.

Because the Thermaltake was a unit from 2013, it was only partially modular. The mobo and cpu had to be pulled to remove the unit, so I had to use Seasonic cables in the Seasonic psu to connect to Mobo and CPU.

And those were the only two things that survived. I have since read that not just crossing manufacturers, but sometimes mixing cables from one brand can cause this. If you were switching psu from brand X to brand y and brand x was fully modular and brand y is fully modular and you figured you figured you could just use the brand x cables in your brand new brand y psu, it is quite possible that you blew every single component.

So I hope it isn't that. I'm surprised psu manufacturers don't put in a warning about this. The rule is this: The cables that come with the psu stay with the psu. If you use that psu use those cables. If you switch psus switch to the new cables in the new unit.

I hope your issue is less catastrophic.

Greg N

 

[smileto82]

Intel Core i5-7400 Box (4, LGA 1151, 3GHz)
BX80677I57400

 

[alexoiu]

The CPU is not compatible with that board.
https://www.asrock.com/MB/Intel/H310M-HDV/index.asp#CPU

 

[smileto82]

The CPU is not compatible with that board.
https://www.asrock.com/MB/Intel/H310M-HDV/index.asp#CPU

Well that would explain this...

Let me check again

Edit:

That seems to be the problem. Well, seems that I need another mb, because that was the cheapest...

Thank You

 

[alexoiu]

You're welcome.

 

[smileto82]

Bought a new mainboard today which supports this cpu. Works now.

Thank You alexoiu and gn842a

 

[alexoiu]

No problem.