I have a HomeBuilt using an Abit AN7 with Athlon XP 2500 & 1 gig PC3200 mem. OS is XP Pro I upgraded from XP Home. My system will not go to sleep as it used to and also will not shut down on it's own. Gives me the screen that I can now shut the system off instead of doing it automatically. How can I fix these problems without reinstalling XP? I have several programs with data that must be resetup each time I do a full install and would really prefer not to. Please help.Thanks, DJ Archer

Check Device Manager and verify that Windows XP is installed as an ACPI Computer and not as Standard PC. Also, select the View Hidden Devices option and advise if anything is disabled.

Check your BIOS and see if ACPI is enabled and APM is turned off. Before you turn off APM, post back and advise what you found.

Your post suggests that all was well originally. It sounds as if Power Settings in the BIOS were changed or corrupted.

EDIT: Did the problem occur when you upgraded to Windows XP Pro?

I think in Power Options (in Control Panel), there is a setting somewhere to enable APM (or something to that effect). It doesn't show up on mine since I installed an UPS, but I remember I once had to enable APM before it would power off automatically.

I think you only get the APM tab if the HAL is installed as 'Standard PC' - you don't get it with 'ACPI Uniprocessor PC' as the ACPI takes over those functions.

Ok. I got a new motherboard. I guess that's why that option is not there now.

>
>I think you only get the APM tab if the HAL is installed as
>'Standard PC' - you don't get it with 'ACPI Uniprocessor PC'
>as the ACPI takes over those functions.
>