Computer turns on for split second (fans run) then turns off

Alex Coles

Honorable
Apr 27, 2013
2
0
10,510
So I bought some new computer parts recently, to take my computer out of the stone age, but then a whole bunch of problems started happening ... I'll write it all chronologically to hopefully make it as easy as possible to find the root of the problem.

My old computer, I've had for some years now it's been working fine. The new computer parts, an ASROCK z77 extreme 4-m motherboard, i-5 3570k 3.4ghz quad-core processor, corsair CX500 PSU and two 4GB RAM sticks (Samsung Green (MV-3V4G3DUS) 8GB (2x4GB) DDR3 PC3-12800C11 1600MHz) arrived quite quickly, so I started getting to work putting it all together. The first problem I came across was the fact that the heads of one of the screws had worn away which made it pretty tough to get out - I ended up just unscrewing all of the other things holding the motherboard down to the case and then just pulled out the board with the screw an the standoff it was screwed in to coming out with the motherboard. When I looked back at the case there were a few scrathes not too far from that screw and where it had been uprooted, the case had sort of warped in to a little mound.

Okay, so that's out. I stick the new processor in to the z77 extreme 4-m motherboard, I put my two RAM sticks in, I plug my GTX460 card from my old board in to the PCI-E slot in the new board, and I plug the PSU in to the 24-pin connector and the 8-pin connector and connect the power switch from the computer case on to the board. I turn it on the green light on the front of the case turns on and the fans of my CPU and PSU (possibly my GPU, but I didn't check) start up. Within a split second, the light goes away and the momentum the fans had started to build in that split second finishes so they stop spinning. I just have absolutely no idea what to do and I've been working at it for practically every waking moment since I started having the problems but with no luck.

So I thought okay, I'll just put my old computer back together. So that's what I do, the fans start, the hard drive starts, the disk drive starts, all of the normal build up, but at the end of it all there's no beep and I'm getting no display either, whereas before taking it apart my old computer was working fine.

And at this moment in time, I'm sitting here with a bunch of computer parts and have no idea what's wrong, whether any of the new pieces are got are dysfunctional or if I did something wrong myself.
 

simjracer

Honorable
May 9, 2012
32
0
10,530
hi mate

to what i can understand there 2 thing that it could be

1. where the motherboard tray to warped it could be touching the motherboard and when you switch it on it short out the m/b aka dead motherboard

2. it might need a bios update for the motherboard to run that cpu

on your old computer if your motherboard got a vga port to plug in your monitor if so take out the gpu and start it up if works then its your gpu

i hope this help you
simj