PC only turn on when case fans not connected

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Lighttninx - Updated on Aug 29, 2017 at 12:28 PM
xpcman Posts 19532 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 - Aug 29, 2017 at 12:50 PM
Hi guys, im building a new pc and i have had a problem where all my components turn on for one second and then switch off.So, unplugged each cable from the spu and tested each one.Then i realised when the case fans are connected to the motherboard,the compter spins for one second when the case fans are no connected the compter turns on normally.
Any ideas?Thanks.

1 reply

xpcman Posts 19532 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 1,829
Aug 29, 2017 at 12:50 PM
it appears that your case fans are drawing excessive current thru the motherboard. the MB is then shutting down to protect itself. Either replace the fans or run them off a power connector.

Good Luck
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