replaced psu, now psu wont start

G

grumpyman

New Member
hello everyone--this is my first post. just replaced my antec basiq 480 with an antec basic 500. 500 won't start, although i can short the green wire in the 20 pin connector to a black and the unit will start. i also noticed a big difference between the 480 and the 500--the 500 has no 3 pin fan connectors. this may be an issue as some units wont power on without a fan. i am using an abit ic7 max with an intel pentium 4 3.2g and 1 g of ddr4 ram. any suggestions will be greatly appreciated as i don't want to lose this motherboard although i suspect it is fried. thanks in advance everyone.
 
Any particular reason you went from a 480 to a 500 watt psu? And fans don't have to be attached to the psu, they can attach to the motherboard fan headers. If the 480 works and the 500 doesn't then I suspect the 500 is faulty.
 
new post with more information

about 10 days ago the psu started to power up but not show anything on the monitor and the monitor would fail to come on. i didn't suspect this as a sign of psu failure--but that's on me. this continued off and on until the psu refused to start up at all. tried shorting the 20 pin green to a black--no response. removed psu and took to staples for testing-the verdict was DOA. ordered closest wattage antec--500u. installed everything--wont power up. tried removing the front power switch leads and shorting the pins on the motherboard-no response. tried shorting the 20 pin green to a black--psu started. i think the motherboard is fried--i hope not. i apologize if my initial post was vague. system info--abit ic7 max-intel p4 3.2-1g ddr 4. thanks in advance
 
You tried a lot, but you should try to use a simple psu and attach that to your system, to see if something else isn't broken too.
 
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