Custom PC shuts down imediatly

[Anowil]

Hey there,

 

I've recently starting building my first computer, but I've run into something I can't seem to fix. After switching my computer to a new case, recplacing the PSU and CPU cooling I can't get it to function. I've triple checked if every cable is connected properly, I took it apart and build it up again but neither seems to work. Before I switched to a new case/components my old computer didn't have any such issues, so I'm quite sure I screwed up somewhere in the building procces. The computer does turn on for about a second, before it shuts down again.

 

- The components - 

GPU: XFX Radeon HD 7970

PSU: Corsair VS650

CPU cooling: Corsair H110

Motherboard and CPU: The motherboard and CPU originate from a HP z400 workstation. The motherboard is a HP Invent FMB-0802, and I'm afraid I can't find out which xeon CPU is inside.

RAM: Corsair XMS3 2x 8GB (total of 16)

Casing: Define r5 Fractal

 

The replaced components were the PSU, and the CPU cooling from the HP z400 workstation, which I'm afraid, do not know their product names. My old case was the HP z400's case.

 

I'm at my wit's end, if anyone could give me some insight it would be very much appreciated.

 

Kind regards,

 

Anowil

[Swndlr]

maybe theres a short somewhere or a psu issue?

with my pc, when i first got everything put together i sat there for like an hour trying to figure out why it would turn on for like a second then turn off, turns out the psu that newegg sent was a baddie

[Ie0n]

If you want to check the PSU itself, disconnect it from the system and jumpstart it. It's really not that hard, just connect the the green cable on the 24-pin connector with any black cable on the 24-pin connector with a paperclip.

Shorting those two cables is the same thing as pressing the power button, but you can see whether the PSU crashes on its own

[Anowil]

Thanks for the replies guys, I tested the PSU in someone elses computer, but it seemed to work fine there. Is it possible that the motherboard I'm using isn't compatible with other cases? Because right now that's the only thing I can come up with aside from the cables in the case being faulty...

[mark201200]

Thanks for the replies guys, I tested the PSU in someone elses computer, but it seemed to work fine there. Is it possible that the motherboard I'm using isn't compatible with other cases? Because right now that's the only thing I can come up with aside from the cables in the case being faulty...

Build it outside of the case and see if it works

[asim1999]

True, the VS is low-end, get a Corsair RM650 or an EVGA 650W as decent replacements 

[dragoon20005]

Hey there,

 

I've recently starting building my first computer, but I've run into something I can't seem to fix. After switching my computer to a new case, recplacing the PSU and CPU cooling I can't get it to function. I've triple checked if every cable is connected properly, I took it apart and build it up again but neither seems to work. Before I switched to a new case/components my old computer didn't have any such issues, so I'm quite sure I screwed up somewhere in the building procces. The computer does turn on for about a second, before it shuts down again.

 

- The components - 

GPU: XFX Radeon HD 7970

PSU: Corsair VS650

CPU cooling: Corsair H110

Motherboard and CPU: The motherboard and CPU originate from a HP z400 workstation. The motherboard is a HP Invent FMB-0802, and I'm afraid I can't find out which xeon CPU is inside.

RAM: Corsair XMS3 2x 8GB (total of 16)

Casing: Define r5 Fractal

 

The replaced components were the PSU, and the CPU cooling from the HP z400 workstation, which I'm afraid, do not know their product names. My old case was the HP z400's case.

 

I'm at my wit's end, if anyone could give me some insight it would be very much appreciated.

 

Kind regards,

 

Anowil

most likely there is a short between the case and the mobo

 

take out the mobo from the case and place it on a box and see if it powers on

 

also verify if the RAM is fully seated

 

the above RAM or short will cause the PC not able to boot

[Anowil]

most likely there is a short between the case and the mobo

 

take out the mobo from the case and place it on a box and see if it powers on

 

also verify if the RAM is fully seated

 

the above RAM or short will cause the PC not able to boot

Thanks for the reply, the mobo powers on properly, there's a light that remains on at all times unless I unplug my PSU. The RAM is fully seated aswell, so that cannot be the issue either.

[dragoon20005]

so i can only think of is CPU or mobo

 

@Anowil

[LudoTheGreat]

I've seen HP workstations do this in the past. Reseat the RAM and clear CMOS. Usually one of the two options works for me.