pc wont switch off!

[boydar]

i have an asrock k78sx with amd xp2400 cpu ,512 ram.when i turn of the pc through windows it says windows is saving your settings then freezes and wont turn off unless i remove the power lead .i have not got the power switch fitted or the power or hd leds.as soon as i power up the psu it all starts and runs perfectly!.it just wont switch of.please help.thank you

 

[W1zzard]

does it says "acpi" pc in your device manager under computer ?

 

[boydar]

yes it does

 

[wazzledoozle]

My computer freezes while shutting down, but only if their is a cd-rom in it. Under device manager it says ACPI uniprocessor computer, what is the significance of this?

 

[boydar]

i reloaded standard pc drivers into the apci now the pc switches off but at the very end a screen pops up saying "it is now safe to turn off your computer".this is not bad but i would rather have the whole thing switch off rather than having to turn it off at the plug!

 

[boydar]

ps wizzard are you the dude who does the bioses?

 

[Ramine]

Hey how did u reload the standard pc bios? give us some help, mine wont even shut down proper, well it turns ff but the fasn still run, and when i switch on it just spins up the fans, in the psu as well, untill i press the on button then it wil turn on, could it be the psu temp monitoring? its a Q-TEC 400Watt Big Fan PSU.

 

[boydar]

im a noob so dont really know what im doing,did find a post that said go to device manager right click acpi uniprocessor[under computer] driver update,from list then load standard pc drivers.after doing that it switches off ,fan still runs but screen apears saying it is no safe to switch of pc.have heard it can make a mess of things also,better wait for wizzard to reply

 

[C&C Freak 2K]

Just a guess, but it probably has something to do with the power management features of ATX systems. Without the advanced features, it reverts to a more primitive AT power off mode.

 

[boydar]

that sounds right .thanks