Custom-built computer won't turn on

[DrShmoogle]

Well, I just finished building my first computer (my first build, not my first computer), and when I plugged it in and powered it on, the fans turned on for half a second, then turned off. I turned the power off then on again, but this time nothing at all happened.
I would like to point out that the mobo led does not light up when the power is on.

Thanks for your help
--DrShmoogle

 

[amanikshot]

What your pcu supply because that seems to be the problem (not high enough)?

 

[DrShmoogle]

My PSU is 600w...

Also, the green led light came on after I fiddled with some wires... but nothing else turns on...

Well, now I'm really confused. Sometimes when I turn the power on, the little green led lights up. Other times, all the fans turn on for a second then turn off, but with no green led light. But most of the time, nothing happens...
What's goin' on?

 

[amanikshot]

See maybe ur components ie your GPU are not getting enough power?

Check the requirements of all ur stuff and see is 600w enough for them

 

[220racer]

Its either the power supply, or there is a compatability error, List me all of your components and I can check if the wattage is enough.

 

[Limit]

First - I would check the heatsink is making good contact with the CPU.
Second - With no spare power supply to try, I would uninstall all components except for 1 DIMM, graphics card, processor and heatsink and fan assembly and see if that works. Trialing one DIMM a time.

A spare power supply would be ideal to trial. Your 600W supply is quite powerful so i doubt its a power shortage issue.

 

[edalbkrad]

check if you also plugged the 4-pin cable from psu to the motherboard.

If the fans run for a split second when you turn on, it usually means you plugged the 24-pin cable but forgot the 4-pin. It should be somewhere near the cpu/cpu heatsink