help! Computer shutting off

[Capii]

Hey guys, so my computer was behaving strangely in the near past, it was turning on and then off instantly, but after 2 or 3 restarts it would just start up normally. But when i came back home yesterday (was away for 3 days) the computer won`t turn on no matter what...

It justs fires up and then immediatly shuts down, so i did my research and tried to solve it but with no succes.. now i need some help cause im out of options =/

 

So what I already did:

1- Removed everything from the case to check for shorts

2- Checked the psu doing the paperclip trick and checked it with a multimeter

3- tried booting with nothing on but the CPU and 1 ram stick

4- did the CMOS clearing thing 

 

And my computer configuration:

 

intel i5 2500k

2x 4gb 1333mhz kingston ram

250gb samsung 840 ssd

asus p8p67-pro rev3.0 mobo

ocz fatal1ty 550w power supply

msi GeForce GTX460 Hawk

[JamesDwho]

Do you have a motherboard speaker handy? listening to the beep codes might help diagnose the issue

[Whaler_99]

Did you try boot with just CPU and nothing else? Try different video card, or onboard?

 

Honestly, sounds like either a PSU problem or a motherboard issue. The old 4pin PSU plug in nice and tight?

[Capii]

@james, i dont have a speaker here.. i could use a headphone maybe to hear the beeps but i dont think there is time for them .. it just shuts off immeadiatly after turning on..

 

@whaler, well i did with just a stick of ram and the cpu, but still it just goes off soon after, the 4-pin is secure..

 

maybe i will just go to my local shop and let them do some testing..  honestly i dont think there is anything else i can do.. and there is no mistery on these things.. 

 

well, thanks for the fast response guys.. wish me luck