[SOLVED] Power problems

[Spriggs]

Hey All,

Just built my friend a new PC and for the first time, I'm running into a power issue. I am able to to flip the switch on the PSU and there seems to be power on the MOBO for a split second prior to shutting off. I have taken out every part (tried after each part removed) minus the MOBO, CPU, and PSU with the same result. Power seems to go to the MOBO for a second and then turn off. The power button does not work at any point. Any ideas? I was thinking it might be a bad PSU or MOBO.
PCPartPicker part list / Price breakdown by merchant

Type|Item|Price
:----|:----|:----
CPU | AMD - Ryzen 7 2700X 3.7 GHz 8-Core Processor | $279.99
CPU Cooler | Corsair - H60 (2018) 57.2 CFM Liquid CPU Cooler | $39.99 @ Newegg
Motherboard | Gigabyte - X470 AORUS ULTRA GAMING ATX AM4 Motherboard | $119.89 @ OutletPC
Memory | Corsair - Vengeance LPX 16 GB (2 x 8 GB) DDR4-3000 Memory | $109.99 @ Newegg Business
Storage | Samsung - 860 Evo 500 GB 2.5" Solid State Drive | $77.99 @ Amazon
Storage | Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive | $59.89 @ OutletPC
Video Card | Gigabyte - GeForce GTX 1070 8 GB G1 Gaming Video Card | $299.99 @ Newegg
Case | Corsair - Carbide Series 275R (Black) ATX Mid Tower Case | $52.10 @ Newegg
Power Supply | EVGA - SuperNOVA G3 650 W 80+ Gold Certified Fully-Modular ATX Power Supply | $69.99 @ B&H
Operating System | Microsoft - Windows 10 Home OEM 64-bit | $98.89 @ OutletPC
Case Fan | Noctua - NF-P14s redux-1500 PWM 78.69 CFM 140mm Fan | $14.95 @ Amazon
Case Fan | Noctua - NF-P14s redux-1500 PWM 78.69 CFM 140mm Fan | $14.95 @ Amazon
| Prices include shipping, taxes, rebates, and discounts |
| Total (before mail-in rebates) | $1318.61
| Mail-in rebates | -$80.00
| Total | $1238.61
| Generated by PCPartPicker 2019-02-24 23:15 EST-0500 |

 

[Barty1884]

Could be either, but it sounds like you're experiencing a short....

Do you have standoffs installed in the case? No part of the MB I/O shield is shorting (say a USB port or anything)

 

[MeanMachine41]

Hi Spriggs

Are any of your status LEDs lit on the MB? They are CPU, DRAM, VGA, and Boot. If any are lit then post will not advance till rectified.
Double check all cabling and connections.
If still no go then next is PSU. You will have to swap it out with a known working unit of same or higher Wattage.
If the PSU proves good then test the MB outside the case (benchtest in case of MB standoffs shorting)
If then the problem persists, RMA the MB.

 

[Spriggs]

Could be either, but it sounds like you're experiencing a short....

Do you have standoffs installed in the case? No part of the MB I/O shield is shorting (say a USB port or anything)

I don't believe anything is shorting. The case came with preinstalled standoffs as well.

 

[Spriggs]

Hi Spriggs

Are any of your status LEDs lit on the MB? They are CPU, DRAM, VGA, and Boot. If any are lit then post will not advance till rectified.
Double check all cabling and connections.
If still no go then next is PSU. You will have to swap it out with a known working unit of same or higher Wattage.
If the PSU proves good then test the MB outside the case (benchtest in case of MB standoffs shorting)
If then the problem persists, RMA the MB.

The only light that comes up is one of the RGB heatsinks. It flashes for a moment and shuts off.

 

[MeanMachine41]

The status LEDs should initially come on then go out and if not then I would suggest it's a power delivery issue. Which could be PSU or MB.

 

[Spriggs]

The status LEDs should initially come on then go out and if not then I would suggest it's a power delivery issue. Which could be PSU or MB.

I'll be pulling the parts and using a different PSU to try a boot outside the case later today. Hopefully this will help determine what's going on.