Non-Starting PC

[Bottomburp]

Afternoon all.

Just thought I would throw this out there before I start taking things apart.

Asus X99-A Motherboard

i7-5820K

16GB (4x4GB) Corsair LPX

Zotac GTX 970

bequiet! Dark Power Pro 850w power supply

bequiet! Silent Base 800 case

PC non-starting. Wires all wriggled and ram re-seated. Remove power lead for 5 mins and then replace, press the start button and things will light up for half a second only before stopping. No time for any error codes on the motherboard before it all goes dark again.

Almost as if the power supply has failed.

Any thoughts? Experience of that PSU failing? Things I am missing before I get the screwdrivers out?

Cheers

[Chasem121]

Will it start without the GPU in there?

[Amazingasian]

Try booting it with 1 stick of ram.  Is the power switch on the PSU switched to on?

[afluffehbunneh]

Sounds like a Power Supply problem. I would definitely start their with your diagnosis. Dumb question, but is your power switch turned the right way and is the voltage on the back set correctly?

 

USA is normally 120V on the switch in the back I believe.

 

If everything is correct there, take a look at the jumper pins. If they have any plastic connectors on the pin, I have an experience with them being configured wrong. Seems like every "No Power" issue I have run into has been a result of the pins being configured incorrectly. Either use the motherboard manual to make sure, or try adjusting them.

[Bottomburp]

Tried taking the mains (240v) supply from the wall rather than the surge protector it was plugged into - No dice

Tried one stick of ram - No dice

Tried without GPU - No dice

:unsure:

[Bottomburp]

OK well that sucks. A new PSU arrived today (I had nothing big enough to test this PC) and it does exactly the same thing so it IS NOT the PSU.

I'll strip it down tomorrow and test the motherboard out of the case. Wish me luck.

[Bottomburp]

Another update.

Prior to stripping the whole thing down I thought I would just 'crack' each of the screw securing the motherboard and back them off 1 full turn. AND IT HAS STARTED WORKING!

 

Now I know there are not any wires behind the motherboard so it will NOT be a pinched wire leaving me with A: Something shorting out on the tray or B: Something like a cracked board?  

[Avcoor]

Another update.

Prior to stripping the whole thing down I thought I would just 'crack' each of the screw securing the motherboard and back them off 1 full turn. AND IT HAS STARTED WORKING!

Now I know there are not any wires behind the motherboard so it will NOT be a pinched wire leaving me with A: Something shorting out on the tray or B: Something like a cracked board?

Have you checked behind the motherboard for something that could be shorting it?

[Bottomburp]

That is my next step Sir. Updates to follow

[afluffehbunneh]

Make sure the tightness of the screws/positioning of the screw holders underneath the motherboard are aligned with the grounding circling that the screws fit through on the motherboard. Sounds like when you tighten the screws it is un-aligning the motherboard from the mounting points. If they are no longer on the grounding circles, it will cause a short creating the issue you stated above.

[Bottomburp]

I think that was the case afluffehbunneh. I stripped the whole PC down and rebuilt it from the bottom up (after doing a few case mods) and is working fine. I did not do anything different to how I would normally assemble a PC so unless it happens again I will have to put it down as 'one of those things'.

[afluffehbunneh]

I had a server that did this one time. Someone took it apart and put it back together improperly. Xbox 360's do this sometimes as well with the usb pins inside the case cover. If a wrong piece of metal is touching a wrong place, it will cause a short. That short will cause you to have no power. Hopefully, everything looks good from now on. Probably should mark this as solved!

 

I'll be hopping on to the next threat. Get it. Hopping. You know because...nvm.