Pc wont boot

[zmatt]

Yeah this has really got me confounded. I moved into my dorm today and when I hooked my pc up it refused to boot. It was perfectly fine last night when I put it away. I'm no n00b when it comes to hardware troubleshooting, but this has me worried. First time I turned it on, it came up with an error about no boot device. My first thought was that the Sata connector got knocked loose during transit. So I popped her open and reseated the sata power and data cables. After that when I turn her on she does nothing. Just sits there with fans idling. Nothing on the monitor and the keyboards don't even light up.

So far I have:

Unplugged everything non essential for boot, ie: hard drives, dvd drives
re seated the memory
double checked all power connections.


I also noticed that when I hit the power button it dosent always want to turn on, however I think that is due to the case having a rather cheap power switch, and the failure to power on can be averted if i press hard enough.


Mobo is Biostar TP45
PSU is Corsair 520vx
Both proven reliable devices, I find it hard to believe they would just fail on me.

 

[Lexluethar]

Have you rest the CMOS?

 

[zmatt]

I have and it had no effect. It occurs to me that I could be suffering from dirty power in the dorm room.



EDIT:
To test to see i fi had dirty power i plugged the machine directly into the wall. Now the keyboard lights up when it starts but it is still unresponsive afterwords. Also sometimes when I start it it turns off as soon as it starts. Is this indicative of dirty power? I haven't had to deal with it before so I'm not sure.

 

[KurrentEweser]

The keyboard gets it's power from the PSUs standby power source. So the keyboard will always have power while the PSUs power switch is on. A quick way to test the case power switch is to short the power header on the motherboard with a screw driver blade.