New computer not working

[Jim_126]

I have built several new computers successfully. The motherboard has a light on standby. The fans begin to spin for 1 second then the computer shuts down, The CPU never beeps and the fan never begins to spin. All components are new. Will be trying known working power source in the meantime.

 

[alexoiu]

Try testing the board outside the case, only CPU and CPU fan installed, both 24 and 8 pin power cables connected.

 

[cin19]

The fans begin to spin for 1 second then the computer shuts down, The CPU never beeps and the fan never begins to spin.

maybe the MB is not compatible to the cpu, so what is your PC specs?