PSU and CPU fan wont turn off when computer is shut down

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AsteroidZ45

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Jun 13, 2015
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i have an American-Megatrends 131GM4-L motherboard with Intel Core 2 Duo E8500 CPU.2GB ram 120GB Seagate HDD using IDE.Its running windows 7 Pro 32bit
I have a major problem.
I shut down my pc using the shut down button in windows .The monitor display goes off, the HDD goes off,but the PSU ,System and CPU fans still work.If i put the main outlet switch off it goes off but as sonn as i put it on again the pc switches on again but not the display on monitor or HDD just the PSU and CPU fan.The only way to BOOT into windows is to remove the BIOS batttery wait like 2 minutes reinsert and then it will Boot.If i do a restart from in windows it will boot normally
Your assistance will be greatly appreciated
 
Solution
sounds like the motherboard power on/off signal to the psu circuit is failing. not much your going to be able to do but replace the motherboard which is not really worth the cost.
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