Computer doesn't turn on, strange psu ocurrence.

[imported_Rem]

Long story short:

Receive a call from a client saying that the computer wasn't turning on, I get to the place, and the computer turns on but after about 1 minute it shuts down, when I try to turn it on again it doesn't turn on, after about 10-15 minutes of being shut down, I try again and same thing turns on gets to windows turns off, doesn't turn on :/. I think PSU, go to a working computer, pull the PSU out of the working one, put it in the non working on and BAM, doesn't turn on (thing is this PSU was working in the other computer just fine). I try to put it back into the original, working computer and now that one doesn't turn on.

I'm all out of ideas, tried it in another computer and same thing, so now I try it on a third computer and again after the PSU swaps it wont work either . So 3 computers are dead now because of this hell loop... Pls anyone, any suggestion is welcome. I'm going home to check another PSU from another computer I have that's working to see if it works.

The computers are all the same, same psu, same case, same proc everything.

Athlon 64 socket 754, generic psu called hydra 450 etc.

 

[montag451]

I would like to say try a know good brand of psu - but you will just punch me on the nose.

Apart from that - are you sure the little 4 pin plug from the psu for the cpu is plugged in?

 

[imported_Rem]

Ok, new bit of info, we got here, we did a stupid strange out of desperation thing (me and my friend). We got a really old PSU 100w that didn't have the p4 connector, we put it on the mobo without the p4, connected the p4 from the original psu nothing else, and when we connected the power to the 100w psu it turns on, I can't shut it down with the button it just turns everything on and does nothing else ;( ... Faulty PSU or MOBO?

It works the other way around also, if we connect the power cable to the PSU that only has the P4 pin adapter connected it will also turn everything on, but can't shut it down unless we disconnect power...

 

[montag451]

Can you try the mobo in one of the other systems to see if it is the mobo. hassle.
or try the cpu in the dodgy system.

Make sure you can trip the mobo by touching the power on header with a screwdriver.