[SOLVED] PC starts, turns off, starts again while nothing connected to it starts

[amund1204]

Hello. I Have a problem with my computer not starting up the way it should after I got some "new" parts. When I turn it on nothing that is connected to the computer starts up (keyboard mouse and monitor), and it turns off after some seconds. 3 seconds later it turns back on, and stays like that. The parts I bought is Sabertooth p67 motherboard, Intel I7 2600k with Intel stock cooler, 16 GB ddr3 ram and a Sapphire Radeon R9 290 Tri-X OC. At first, I had a 500w power supply, which I thought was the problem (not enough watt), but when I bought a Corsair CX750, it still did the same thing. If someone knows what the problem can be, please reply. Thanks, Amund.

Complete spec list:
Asus Sabertooth P67 mother board
Intel Core i7 - 2600k (with stock cooler)
Corsair Vengeance 1600mhz 8gb (4x2)
HyperX Genesis 1600mhz 8gb (4x2)
Sapphire Radeon R9 290 Tri-X OC Graphics Card
Corsair CX750 power supply
3x Be quiet! 140mm fans
Be quiet! Silent Base 800 case

 

[Jwpanz]

Enter your BIOS and check the boot order. Make sure your primary boot drive is listed and placed as the first disk to boot from.

 

[amund1204]

Enter your BIOS and check the boot order. Make sure your primary boot drive is listed and placed as the first disk to boot from.

I can't do that, beacuse my monitor, keyboard or mouse turns on.

Update btw: My pc turns off and stays off after a couple of minutes.

 

[Jwpanz]

Ya, it sounds like you have a dead/dying motherboard man. I suggest swapping it out with a new or known-working board.

 

[amund1204]

My motherboard can't be dead, beacuse my pc worked once when I tried using only one ram stick, and cleaning dust off my cleaner. After I tried starting the pc again it was back to the problem, beacuse I tried with 4 ram sticks. I tried doing 1 ram stick again, but it didnt work...

 

[Jwpanz]

I can be dying. Dying hardware is, unfortunately, always a possibility. The other thing it could be is that you're mixing RAM. That usually causes problems.

Try this: Unplug your PC from the wall. Place only matching RAM sticks in the appropriate slots (HyperX or Corsair but NOT both). Clear your CMOS. Press and hold your power button down for about 30 seconds. Plug your PC back in and try to boot again.

 

[amund1204]

I can be dying. Dying hardware is, unfortunately, always a possibility. The other thing it could be is that you're mixing RAM. That usually causes problems.

Try this: Unplug your PC from the wall. Place only matching RAM sticks in the appropriate slots (HyperX or Corsair but NOT both). Clear your CMOS. Press and hold your power button down for about 30 seconds. Plug your PC back in and try to boot again.

Thank you so much 😀