CPU and Case fan continues spinning even when PC is off

[crazlunatic]

This is a really odd situation. I used to own this computer and when you "Shut Down" (not standby) the computer, everything is off.

But recently I handed the PC off to my bro and the only difference is that he now has an Nvidia FX 5200 instead of an ATI Radeon 9200 and a different 80 GB S-ATA.

When he turns off the computer, the case and CPU fan continue spinning. How come and how can I fix this as it makes a lot of noise.

Thanks

 

[itotallybelieveyou]

awesome. try a different psu?

 

[dragonsprayer]

its the mobo maybe when he changed the video card he broke the mobo - i am guessing. the mobo tells the psu when to power up and the bios tells the order

 

[crazlunatic]

he can't have broken it because I installed it xD.

I dont think I broke anything because I just gently inserted it without touching any other parts. I also grounded myself.

 

[crazlunatic]

does anybody know why this is happening?

 

[jhyukkang]

some psus have that functions. does the fans runs for few minutes and shuts down it self?? that is because the psu, that function is to cool down your parts