CPU fan spins for like a quarter of a second, then stops. But no boot

[Marcello_1]

So I got home, decided to add another hard drive into my pc. Only to realise i've used up all the SATA ports. So i removed it, and tried to turn the pc on, it didn't. I spent like 10 mins carefully unplugging all the wires and attempting to boot the pc with only like, the bare components plugged in (but no peripherals and the likes), it was just the 4-pin atx connector, cpu fan, cha_fan, speaker (for the beeps), system panel connector and the 24-pin EATX connector. I have a H110M-A/M.2 mATX motherboard with a intel i5 6600k cpu, 8gb of RAM and a EVGA 500w psu. I'ts been about 2 hours now, and still nothing, it just spins for way less then a second, but doesn't boot, there's no sound, nothing.

EDIT: I should point out that pc was previously working just fine, in fact, i had it turned on seconds before I decided to turn it off and put the hard drive in it.

 

[Jared_31]

If you already isolated everything it sounds like maybe PSU?
https://www.youtube.com/watch?v=ixcWCrYpw3Y
i would try that and see what happens


http://cdn.overclock.net/a/ad/500x1000px-LL-ad9e1227_atx-connector-20-24pin.jpeg
in case your PSU wires arent color coded

 

[faalin]

unplug the PSU from the wall or any Battery backup if you have one, hold the power button down for 30 seconds to drain any and all power out of the PSU. Plug PSU back into wall or battery backup and try to power on.

You may have overloaded the system or sata/molex, draining and resetting the PSU might get the computer to boot back up. If that is the case i would look at getting a new PSU as you would be boarder line on the power limits of that unit.