PC Not Powering Up, Not Booting! Goes Off After A Second

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Joined
10 Aug 2016
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189
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Saltburn By The Sea
Been two days into troubleshooting that my PC doesn't want to power up, I turn the PC on and about 1 short second it goes off again. I have added new parts:
  • Corsair Commander with three fans and RGB Lighting Controller, with RGB lights.
  • corsair h115i pro
  • Asus 1660TI
I'm using motherboard Asus P9x79 Deluxe with i7 3930K cooling with corsair H115i pro. AWas running on a 1200w power supply. I double-check each cable and it's all connected, the H115i connections are three-pin to the three-pin connection as well as there are 4 pins heading next to it.

When it does that it goes on than off I do notice that the CPU red LED light comes on then off, same with the ram sticks and at times red lED does come on but when sticks still in it doesn't. The thermal past is working and in place. I did try it with card discounted and still nothing. Clearing Cmos and added a new battery and still nothing. The case fans are connected to the Corsair commander. When I turn it on the fans do move but after a second it stops as there is no power.

I did have a 1200W PSU that's 5 years old, I have done the paperclip method and it comes on for less than a second with a click then off. So I brought RM850x PSU and it works and tested. I received it today.

Beforehand It was running fine with the GTX 680. And not to mention that before when I turn the pc on (before the upgraded hardware), it starts up for one second then it goes off (with a click) then one or two seconds later it powers up to life and loads to windows as normal.

I thought my old PSU is dead but when I test it over it just doesn't want to run, yet my new PSU does. Anyway new PSU connected to the motherboard and it goes on then less then a sec goes off
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However, when PSU is connected to fans and lights and using the paperclip into green and black it runs. As soon as It's in the motherboard it plays up and doesn't run.. just doesn't want to power up.

I added and removed many parts of the hardware and nothing. I clear the Cmos countless times and nothing

PS My motherboard has been in storage for the last two months and it got cold.. No idea if that upset it??
 
Nope, But the last step I did was disconnect all the parts and just had the CPU power cable & main cable with one memory stick and CPU fan cooler..

It powers up then less than a sec off again...

Sorry for the slow reply... Once you've checked all cables are firmly seated, if the problem still occurs, try clearing CMOS.. This will put all settings back to basic and can sometimes help
 
Nope, But the last step I did was disconnect all the parts and just had the CPU power cable & main cable with one memory stick and CPU fan cooler..

Try building it outside the case. DO NOT sit the motherboard on an anti-static bag. Also try using the stock heatsink. Also, did you have power going to the CPU cooler?
 
Got it working :)

I removed everything and disconnected from the motherboard. Then connected the power cables into the board and switch it on from the power button on the board. It powered up and stayed on for around 10 seconds before I turned it off before the CPU overheated as there was nothing on the CPU.

From there are added parts bit by bit and power her on at the same time. The end results seem to be the thermal paste that came stock with the H115i. Early on as I was removing everything I cleaned off the past that came with it and added my own past. The past I used is Arctic MX-4

Ever since then I got it working, Just having errors with the Corsair Commander PRO where the fans are maxed to 1500 rpm or too low as in 600 rpm. I just can't set it up to run automatically, I noticed that when I set it in the software setting a three-pin fan it runs around 600 to 700 rpm but when I set it to 4 pins it goes up to 1500 rpm. Then the corsair rgb strips not working. It shows on the software and can it read all but lights not going. It has power to it....
 
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