ATX_12V problem

BovineKid

Junior Member
Jan 10, 2008
6
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I just built my first ever system (sort of). It's not posting, and I suspect the PSU may be my problem. My MB (abit IP35v link) takes a 4-pin ATX_12V, but my power supply (Silverstone ST50F link) has an 8-pin ATX_12V. Someone on Newegg who purchased the same PSU said he got his to work by just plugging in 4 of the 8 pins. I tried this, though I'm not sure which 4 to use. Also, there are only 4 that I can use since a transistor gets in the way if I try to use the other 4.

I haven't ruled out anything else as the reason I'm not posting. Can I work with what I have? Can I get some kind of adapter? Or do I just need to buy another PSU?

Thanks!
 

BovineKid

Junior Member
Jan 10, 2008
6
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Ah, yes. It does. Thank you!

It seems that the way I have it should work, which means something else is preventing my system from posting. Probably something worse. :frown:
 

mpilchfamily

Diamond Member
Jun 11, 2007
3,559
1
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First thing you should do with a new build that doesn't post is double check all your connections. If you have to go threw and un plug and replug in everything. Chances are you just have a loos DIMM or power connector. Next check for shorts. Make sure you don't have any motherboard standoffs that do not line up with a hole. Allot of times its just something small and simple that you may have missed.

Had one build where the system would only turn on for a short second. Finally i found it was a problem with the fire wire. The pin araingment for the case's front panel wasn't the same as the pin araingment on the mothebroard.
 

Jhhnn

IN MEMORIAM
Nov 11, 1999
62,365
14,681
136
Start by unplugging everything not required for system post- processor, minimum of memory, vidcard, monitor, power sw.- that's it. Also try using the reset sw as the power sw- they work the same.
 

DSF

Diamond Member
Oct 6, 2007
4,902
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If the above tips don't work, take the motherboard out of the case and rest it on a non-conductive surface like a cardboard box. Plug in the bare essentials and try to boot up. If that works, then there was a short against the case somewhere. Check for loose screws, extra standoffs, etc. Anything that could be interfering with motherboard operation inside the case.