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New computer turns on then off straight away

Jake5467
By Jake5467
in Troubleshooting
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Just finished my new build, testing components all through the build as usual. Put the side on to finish build, power it up and beautiful all the fans spin, hard drives spin and all lights come on. All went well obviously so the only thing I did after this was put the sides on and hook up the cables. Now it won't boot. The lights flash for power for one second then turn off. I just can't get my head around it. I have isolated the power and tested the psu with the paper clip and its fine (corsair hx750w). The motherboard was fine (I still think it is as the onboard LEDs light up and the on board power buttons also works (Asus z97 deluxe). Can anyone shed some light or suggest something? It does my head in that it was running perfectly and the only difference made was a couple of usbs and a display port cable. Thanks in advance

Desktop: Intel Core i7  4970k (OC 4.8GHz), ASUS Z97-Deluxe, 32GB RAM 2400MHz, 2x 256GB Intel 730 Series SSD, 2x 3TB WD Black, 1TB WD Blue


1TB WD Green, 2TB Seagate Barracuda, 2x MSI GTX 970 SLI, Corsair HX750i, Phantex Enthoo Pro [7x Noctua AF-14's], Coolmaster Nepton 280L


Peripherals: AOC 4k 28", LG 1080p 28", LG HDTV 55", Razer Blackwidow Stealth Edition, Razer Naga Epic, Turtlebeach PX4

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Make sure the mobo is not shorting out somewhere and that the raisers are all correctly positioned. Could it also be a faulty power button in the case?

"Fighting for peace is like screwing for virginity"

- George Carlin (1937-2008)

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Looks like the overvoltage protection thingymagic to me.... Check all the cables and if everyone is plugged in (CPU Power? or cpu fan?) also switch the psu on and off again

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Power button on case is fine. Raisers I doubt because it had been running fine. Can't get into bios runs for literally one second before turning off. I can hear a click when it turns itself off. Double check all my cables in the motherboard. Checked for bent pins, I just can't work it out. Thanks for the suggestions

Desktop: Intel Core i7  4970k (OC 4.8GHz), ASUS Z97-Deluxe, 32GB RAM 2400MHz, 2x 256GB Intel 730 Series SSD, 2x 3TB WD Black, 1TB WD Blue


1TB WD Green, 2TB Seagate Barracuda, 2x MSI GTX 970 SLI, Corsair HX750i, Phantex Enthoo Pro [7x Noctua AF-14's], Coolmaster Nepton 280L


Peripherals: AOC 4k 28", LG 1080p 28", LG HDTV 55", Razer Blackwidow Stealth Edition, Razer Naga Epic, Turtlebeach PX4

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Looks like the overvoltage protection thingymagic to me.... Check all the cables and if everyone is plugged in (CPU Power? or cpu fan?) also switch the psu on and off again

I have a Nepton 280L, if this is the case should the pump be plugged into the cpu fan header or just a 4 pin pwm? Maybe the pump isn't getting enough power from the cup fan header?

Desktop: Intel Core i7  4970k (OC 4.8GHz), ASUS Z97-Deluxe, 32GB RAM 2400MHz, 2x 256GB Intel 730 Series SSD, 2x 3TB WD Black, 1TB WD Blue


1TB WD Green, 2TB Seagate Barracuda, 2x MSI GTX 970 SLI, Corsair HX750i, Phantex Enthoo Pro [7x Noctua AF-14's], Coolmaster Nepton 280L


Peripherals: AOC 4k 28", LG 1080p 28", LG HDTV 55", Razer Blackwidow Stealth Edition, Razer Naga Epic, Turtlebeach PX4

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Remove the motherboard from the case and try powering it up outside the case. Also check the connectors and the cpu socket(bent pins?)

"like if you could buy two Xbox Ones, put them togheter and actually play games at 1080P! Ha! BURN"

-Linus

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Is it even possible that anything could be faulty after I had it running for about 5 minutes fine, and then moved it and now it's not starting? I'm hoping all it is is that a connection has come loose when I picked it up

Desktop: Intel Core i7  4970k (OC 4.8GHz), ASUS Z97-Deluxe, 32GB RAM 2400MHz, 2x 256GB Intel 730 Series SSD, 2x 3TB WD Black, 1TB WD Blue


1TB WD Green, 2TB Seagate Barracuda, 2x MSI GTX 970 SLI, Corsair HX750i, Phantex Enthoo Pro [7x Noctua AF-14's], Coolmaster Nepton 280L


Peripherals: AOC 4k 28", LG 1080p 28", LG HDTV 55", Razer Blackwidow Stealth Edition, Razer Naga Epic, Turtlebeach PX4

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Of course that can happen  but its quite unlikely - pump in the cpu fan header is ok - they provide the most power on asus boards, even more than standard fan headers

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Maybe your PSU is faulty/bad.

 

I had one that just stopped after 2 days of use. Had to get a new one to fix it.

 

Good luck.

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Just finished my new build, testing components all through the build as usual. Put the side on to finish build, power it up and beautiful all the fans spin, hard drives spin and all lights come on. All went well obviously so the only thing I did after this was put the sides on and hook up the cables. Now it won't boot. The lights flash for power for one second then turn off. I just can't get my head around it. I have isolated the power and tested the psu with the paper clip and its fine (corsair hx750w). The motherboard was fine (I still think it is as the onboard LEDs light up and the on board power buttons also works (Asus z97 deluxe). Can anyone shed some light or suggest something? It does my head in that it was running perfectly and the only difference made was a couple of usbs and a display port cable. Thanks in advance

Post the full specs.

Of u have a graphics card, try and disconnect it from the PCI slot and remove it, and set up the PC using onboard graphics. 

Current Rig:   CPU: AMD 1950X @4Ghz. Cooler: Enermax Liqtech TR4 360. Motherboard:Asus Zenith Extreme. RAM: 8GB Crucial DDR4 3666. GPU: Reference GTX 970  SSD: 250GB Samsung 970 EVO.  HDD: Seagate Barracuda 7200.14 2TB. Case: Phanteks Enthoo Pro. PSU: Corsair RM1000X. OS: Windows 10 Pro UEFI mode  (installed on SSD)

Peripherals:  Display: Acer XB272 1080p 240Hz G Sync Keyboard: Corsair K95 RGB Brown Mouse: Logitech G502 RGB Headhet: Roccat XTD 5.1 analogue

Daily Devices:Sony Xperia XZ1 Compact and 128GB iPad Pro

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I know this sort of thing can be very annoying.

 

As you said you plugged up extra USB, I take it this was peripherals etc into the rear I/O.. I have had to deal with an instance that one of the rear I/O USB hubs would prevent boot up if anything was inserted into it.

 

Please remove all usb cables and try and post, if you post, see if it is a particular USB device or hub in the rear I/O that has caused the issue.

 

Let us know how you get on.

 

Regards

 

Ed

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