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Fans spin for a second and then nothing

Trish's Escape from Hardware Hell Help Board » Hardware » Dead, Dying or Booting Problems » Fans spin for a second and then nothing « Previous Next »

Author Message
Caleb Ronsen
Posted on Sunday, April 27, 2003 - 7:16 am:   


I am experiencing the same problem with two different computers.

Last night a friend asked me to swap the motherboards in two different chassises. Both are Athlon ATX motherboards. Both chassises have ATX+12V power supplies and both systems worked fine before hand.

I swapped the motherboards and the I/O shields and reconnected everything and now both systems have the exact same problem: When I plugged in the power cord and turned on the power supply, the power supply fans and CPU fan spun for about a half second and then stopped. The fans would not spin again unless I unplugged the power cord and plugged it back in.

I then swapped the mother baords back to their original chassises and with only a video card installed and no drives plugged in, got the same problem on both systems.

The CPU and memory are firmly seated, as is the video card and the ATX plug. The only thing I did to the boards once they were out of the chassises was to blast all of the dust off of them with a can of air.

Can anyone think of a reason why this happened to two systems or an avenue to check out?
Posted on Sunday, April 27, 2003 - 8:40 pm:   

I have seen this time and time again where a simple swap has gone awry. The first items to check would be if the case panel connections are properly connected for power, reset, etc. Also if any jumpers if applicable were somehow knocked off when the boards were removed or blown off with the duster (it happens). Also when swapping there is the off chance that the CMOS may need to be cleared to defaults especially after replacing boards such as video and sound cards after the swap. Than there is the chance that static electricity was involved if you were not properly grounded and the boards got zapped.
Caleb Ronsen
Posted on Monday, April 28, 2003 - 12:21 pm:   

Thank you. I did make sure that I was grounded when I did the work, but I didn't connect any of the leads from the front panel of either case. I'll try that and see if that works

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