IN the middle of my build. Suddenly wont turn on any more???

MrJB

MrJB

MrJB

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Joined
22 Oct 2008
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117
Hey guys I have suddenly run into a problem with my build.
I got an Dark power pro 750w.

I tested cpu+ram+graphics outside the case, got pc to post and enter bios.
So i started putting it into my case antec 902. Still working when i had all the front connections connected etc..

Now I tried to connect the case fans to the psu. When i had all 4 connected, i tried switiching the pc on again. All that happened was the psu/cpu fans started moving (not spinning), and there was one CLICK coming from the psu, and it would turn off again (all taking less than a second). So now i connected only two fans (both to the same molex cable from the PSU) and it worked, then i tried all four again (2 on a molex cable each). Still wouldnt work. I all tried them independently and they worked. Then suddenly with just one connected i got the same problem again, so i disconnected it again.
Now I tried starting pc again with no case fans connected at all.
Just the graphics card, the cpu and the ram.
But still all I get is a click noise from the PSU, a short movement of the cpu/psu fans, and then it turns off. When I then try the power switch, nothing happens whatsoever. I turn the psu off, unplug, plug it back in and try again(waiting at least 5 minutes before reconnecting). Same thing each time I try?


Any suggestions?
 
Be Quiet! power supplies can have ripples in the 5V rail, which your computer uses to boot, I suggest as BIGBC said above, try with another PSU if you can
 
Thanks for the replies.
It seems that the fan connectors of the bequiet darkpower pro can take a maximum of 0,8A/9,6W across all the automated thermal fan controller connectors so by connecting all 4 case fans of the antec 902 i have gone over that limit. At their maximum setting the big one on the top is at 0.3A/3.6W and the three other fans have a max of 0.24A/2.9W. So in total that is 1.02A/12.3W.

I phoned bequiet, they are going send me a new PSU which should arrive by courier tomorrow fingers crossed. That will hopefully work.

However this will still leave me with the problem of connecting the case fans. I don't want to damage my PSU again. Is there anyone who has the same case/PSU combination? The fans all have molex connectors, so is there any other way to get them hooked up to the PSU ie not connecting them to the termal control thingy? I mean its sort of seems like a joke to me that a 750W PSU would run into problems over the case fans...

EDIT: Never mind, I am an idiot... Just called Bequiet support again, who told me that i can just use one of the standard cables which power hard drives/or optical drives that have a 4pin molex at the end. That way im cutting out using the automated thermal fan control, and plug the fans directly into a normal rail, which should not give me an power problems and would allow to chain some fans.
 
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Can you not get a connector that changes Molex to something else? I'm quite sure you can, would that not work?
 
Never mind, I am an idiot... Just called Bequiet support again, who told me that i can just use one of the standard cables which power older hard drives/or optical drives that have a 4pin molex at the end. That way im cutting out using the automated thermal fan control, and plug the fans directly into a normal rail, which should not give me an power problems and would allow to chain some fans.
 
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