On/Off Cycle During PC Test Boot

[abomb07]

My Parts

I am having some trouble with my first time PC build. Note that these are all new parts and the system has never worked before.

My system goes through an on/off cycle when I am trying to test boot to get BIOS. It will turn on for about 15 seconds (no BIOS) and then turn off for about 3 seconds and repeat this cycle forever. Note that I can tell the system is turning off because the fans on the psu and cpu turn off for 3 seconds. I have tried booting with just the cpu, ram, and psu but it does the cycle thing. I then removed the ram and tried to boot which also did not work. Next, I did the thing where you short the green and black wires of the psu, which was a success. The PSU by itself ran perfectly fine continuously.

I am a first time builder, so any help would be greatly appreciated.

 

[Paul NZ]

Did you connect the CPU, ATX 12v and 24 pin?? All of them have to be connected so it'll post

 

[abomb07]

Did you connect the CPU, ATX 12v and 24 pin?? All of them have to be connected so it'll post

I did connect all of those.

 

[Paul NZ]

Did you put a speaker on the mobo header?? if you did whats it doing?

Did you connect power to the videocard?? If you've got a monitor with HDMI, remove the GPU and see if onboard works

 

[abomb07]

Did you put a speaker on the mobo header?? if you did whats it doing?

Did you connect power to the videocard?? If you've got a monitor with HDMI, remove the GPU and see if onboard works

I do not own a mobo speaker so.............

I have tried with and without my graphics card and it does the same thing.

 

[Paul NZ]

I would turn it off, remove power, then remove the CPU. Check for bent pins