superbantam Posted October 5, 2007 Share Posted October 5, 2007 I'm building a new pc, the first time I've done this, and I'm buying the parts gradually as I can afford them. I've just bought a 520w psu and the only other components I have are a case, 2 fans and a SATA hard drive. I've just installed the psu in the case & it doesn't seem to work - being new to this I'll outline what I've tried. To power the fans I've connected a molex cable to the psu and attached to this the fan cable provided and to this I've attached a 4 pin to 3 pin fan adaptor, I hoped this'd power the fan but nothing happens. Also the fan in the psu itself does not seem to be running, I've checked the power lead by using one I know works & the rocker switch is definately set to on. Should the fan in the psu run no matter what - is this a good sign it's faulty? Sorry if these are daft questions, I just don't want to send it back if it my stupidity stopping it working Thanks Link to comment Share on other sites More sharing options...
v2chrisb Posted October 5, 2007 Share Posted October 5, 2007 Greetings! The power supply needs resistance to function properly and generally needs at least a motherboard attached before anything will work. I experienced a situation very similar to yours so I went to a local Radio Shack and bought a power supply tester (made by Thermaltake). Here's a link: http://www.thermaltake.com/product/Power/misc/a2358/a2358.asp Hope this helps! Link to comment Share on other sites More sharing options...
superbantam Posted October 5, 2007 Author Share Posted October 5, 2007 Thanks for your quick reply and the good advice. I'll try get my hands on one of these & give it a go, hopefully that'll prove it's ok. Thanks again. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 5, 2007 Corsair Employees Share Posted October 5, 2007 In order for the PSU to start up without a motherboard you would need to short the green wire with any of the black wires on the 24-Pin connector (you can use a paperclip). Flipping the switch on the back of the PSU will not turn on unit. Link to comment Share on other sites More sharing options...
superbantam Posted October 6, 2007 Author Share Posted October 6, 2007 Thanks, I'll try that. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 9, 2007 Corsair Employees Share Posted October 9, 2007 Please let us know if you still have problems. Link to comment Share on other sites More sharing options...
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