new pc won't turn on (only MB leds are on)

[Somnium7]

I have built the following rig :

CPU : Intel Core i7-6700 Boxed
MB : ASUS Z170I-Pro Gaming
RAM : Corsair Vengeance LPX 16GB DDR4 Kit (2x8GB) 2400MHz C14
PSU : Seasonic Platinum Series 400 Fanless X-400FL2
Case : Node 304

All parts are completely new and I got them just yesterday.

Once I plug in the power cord to the power supply the leds on the MB are on.
However , when I press power button on the case - nothing happens. Absolutely nothing, not even a single rotation of the fans.

I've gone through the sticky thread , but couldn't find a solution..

Have I missed something?

Thank you.

 

[Threadlight]

Check all of your wiring. It could simply because you didn't wire the front-panel connectors correctly.
If you've quadruple checked ALL of your wiring, then it could be a faulty motherboard. Maybe even the power button on the case is faulty?

 

[rcxtra]

Double check the case Pwr Switch is plugged into the correct header on the motherboard. Also try removing the Reset Switch connector from the header on the MB just in case that switch is broken (shorted).

As a last resort you could remove both the Reset and Pwr switches and just use a small screwdriver to momentarily short the Pwr Switch pins on the motherboard header to turn the PC on. You only have to short the Pwr Switch header pins for an instant for the PC to turn on. Goes without saying... DON'T SHORT THE WRONG PINS.

You can actually remove ALL the front panel connectors and just short the Pwr Switch pins and the PC will still turn on. Or you could have a DOA board... It happens 🙁

 

[Somnium7]

Thanks guys..
I wasn't sure about the front panel connectors.. but it might be possible that I put the Power SW into the reset pins. Does it make sense? I mean it still should've responded or do something, right?

 

[Guest]

Have you also checked if the cables from your power supply is properly installed on the motherboard? the motherboard requires both the ATX 24 pin and the 8 pin CPU power for it to boot. You might have installed one of the cables improperly, It happened to me when I was new at building PC's. Mine wasn't booting, then I saw the cables on my CPU power is not installed correctly. It booted when I corrected it. Hope this helps

 

[Somnium7]

I'll check that again.
Do you think though it could be due to 'power sw' connected to reset pins ?

 

[Guest]

I'll check that again.
Do you think though it could be due to 'power sw' connected to reset pins ?

Yes, connect your power switch connector to the proper power switch pins. There should be a manual that came with the motherboard. Refer to that as your guide

 

[Threadlight]

I'll check that again.
Do you think though it could be due to 'power sw' connected to reset pins ?

That is definitely the problem. Your motherboard manual will have the pin layout for your front panel connectors. 'Power sw' should be connected to the power switch pins on your motherboard, and not to your reset pins

 

[Somnium7]

ok so that was indeed the issue.
Thank you guys

 

[rcxtra]

Do you think though it could be due to 'power sw' connected to reset pins ?

Just so you know... The case Pwr and Reset buttons on the case are both momentary switches that short the pins they are connected to only while the button is depressed. Shorting the Reset pins will not turn on a PC: It will reset the PC if it's already on, but do nothing if the PC is off.

It's always a good idea to test a new motherboard before installing it in the case. The motherboard box makes a good non-conductive surface to test the motherboard on. And you don't have to connect everything just to test the board. Here's the minimum you need to test the board outside the case:
- CPU (w/heatsink)
- RAM
- Power Supply (24pin & 8pin connectors)
- Monitor & Keyboard (to see and navigate BIOS screen)

Then just short the Pwr Switch front panel pins on the motherboard using a small screwdriver or car keys to turn it on. You only need to short those pins for a brief second.