Source
r/techsupport•
aa223

New PC build does not work

Open | Hardware

Operating System

Windows 7

Computer Specs (PSU, GPU, CPU, RAM, Motherboard)

Type|Item:

CPU | Intel - Core i7-8700K 3.7GHz 6-Core Processor

CPU Cooler | Corsair - H100i v2 70.7 CFM Liquid CPU Cooler

Motherboard | Asus - ROG Strix Z370-I Gaming Mini ITX LGA1151 Motherboard

Memory | G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory

Storage | Intel - 600p Series 512GB M.2-2280 Solid State Drive

Video Card | Asus - GeForce GTX 1080 8GB TURBO Video Card

Case | Corsair - 250D Mini ITX Tower Case

Power Supply | Corsair - RMx 850W 80 Gold Certified Fully-Modular ATX Power Supply

Optical Drive | Asus - DRW-24B1ST/BLK/B/AS DVD/CD Writer

Case Fan | Noctua - NF-F12 PWM 55.0 CFM 120mm Fan

Case Fan | Noctua - NF-A14 PWM 82.5 CFM 140mm Fan

Case Fan | Noctua - NF-A8 PWM 32.7 CFM 80mm Fan

Description of problem

This is a new build and when I tested it the following happens:

  • Case fans including the CPU cooler fans spin for 1-2 seconds and then they go off
  • PSU fan spins for 18-20 seconds before turning off
  • VGA fan is always spins
  • POST led does not turn on
  • Motherboard speaker does not work
  • Motherboard LEDs work

Connection from above

When this issue began

The moment I finished the build

Recurring issue

Yes

Date of purchase

N/A

Under Warranty

Yes

Cause/Steps to recreate the issue

Hit the power button

What I've tried so far to resolve the issue

  • Disconnected and reconnected PSU wires.
  • Detached the processor and reattached it.

I have a feeling it is the motherboard but I hope I am wrong and it is a simple connection error. I don't have a diagnostics card to tell me what is wrong.

Posted Jan 20, 2018, 3:10 AM UTC · edited

414
MattHashTwo•

Make sure you haven't connected power to somewhere it shouldn't. I've seen similar behaviour when someone connected a floppy power cable to a fan header on the mobo.

Can of air through the memory slots isn't going to hurt anything though.

3
Ham_Roast•

This has happened to me before, it's possible that one or more of the ram slots are dirty or dead. Try using only one stick and try it in each slot after cleaning them to make sure this isn't the cause.

2
morris-moss•

Sounded like a ram issue to me too, I was setting up a computer at work and only the fans would work when I plugged it into power, opened it up to find someone had harvested the ram

1
Rkk1945•

You mentioned Windows 7, do you already have it installed or are trying to install it? Pretty sure Intel stated Skylake and newer won't support (or rather normal installation methods) Windows 7 natively without doing certain work arounds to get it to install so it might be flat out refused to install Windows 7 once it detects it. Otherwise I'm not so sure.

1
Not_Ross_RS•

I believe Skylake still works with win7, it's Kaby lake that isnt supported.

Edit: Just saw he's using Coffee Lake.

OP, try installing Windows 10.

1
baconipple•

Try reinserting the RAM and GPU.

1
MrSprouse•

Is the M/B new, or have you had it for a while?

0
aa223OP•

It's supposed to be new.

1
MrSprouse•

You said supposed. Did you buy it second hand or somthing?

1
aa223OP•

I bought it on ebay. Here is the listing:

https://www.ebay.com/itm/Asus-ROG-STRIX-Z370-I-Gaming-Motherboard/232598666516?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

1
MrSprouse•

Ok. You should probably contact the seller about it. Check all the connections. Reseat the ram and grapics card. Reseat the processer. If you have any other PSUs on hand, put it in and try to boot it, incase it is the psu.

1
O101011001101001•

Damn such good specs, too bad the cable management is ass hahah

-1