Uhhh I also found this, and it could apply to your situation...... :(

The BIOS upgrade requires and upgrade of the Hardware Abstraction Layer (HAL) of Windows XP. Some HAL upgrades can be accomplished by using the Device Manager, in particular the Device Manager can be used when upgraded a single processor system to a multi-processor system. However, the change from non-ACPI to ACPI by changing drivers is not supported. To properly make this change, an in-place up grade (where the computer is converted to ACPI during Setup) is mandatory. We must reinstall the operating system.
Note: The HAL (Hardware Abstraction Layer) is a set of drivers, upon which the Windows NT kernel is based.

If the installed HAL is incorrect, you may have a problem ranging from certain settings not working (such as
ACPI or APM) to Windows not starting at all.

Reference: HAL Options After Windows XP Setup (Q309283)

thanks for Q article mate, i am gonna install Windows 2000 Professional SP3 and see what happens. :)
u see my bios date (2000/11/20) is newer than windows 2000 release date (2000/02/14) hey? i am pretty sure we can get stand by enabled in this system.

K good luck and let us know how it goes!

for power management by the OS to work, your bios has to support either APM or ACPI, or both.

and yes, from Norm's article, the Hardware Abstraction Layer (HAL), has to support power management. in device manager, you're compter will either be listed as ACPI Uniprocessor PC, Standard PC, or another for APM PC that I don't know because I've never seen it. You can manually change the driver for computer through device manager, but it's a 50/50 chance of XP booting again, and if it does, you'll have to reinstall every piece of hardware's drivers.

you're better off making sure that APM or ACPI is enabled in the BIOS, booting off the XP cd, going through the install, and choosing to repair your install (not the one for the recovery console, the other one), and then it should do it from there out

edit: yeah, if it's listed as standard pc, then xp didn't detect it as having support for either APM or ACPI, that's why standby and hibernate won't work, and probably why you have to manually push the power button to cut off the machine too :P

WOOHOO!! :D

I installed Windows 2000 Professional SP3 and with terrible nervousness click Start > Shut Down.
There you go! Stand By! :thumbsup:

There is no more a tab called APM in Power Options either. Also in Device Manager now it says:
Advanced Configuration and Power Interface (ACPI) PC.

Yada Yada Yada!

Thanks trminatr! my first ever hardware problem which needed a reinstallation. Thanks again, hadn't you gave me that Q article I wouldn't never think reinstalling. I am very grateful. :)

Now let's see whether same thing happens to Windows XP. Oh yeah hopefully!

P.S: Sephiroth, we have both posted at the same time. :D
I decided to format C: and install Windows XP again. Thanks again!

Glad to hear that helped you! :D

Now lets just hope your computer "wakes up" from standby <_<

My last one never did do that properly :blink:

It was a celeron 500 though.

Formatted and Installed Windows XP Professional SP1.



My mates, today is my day! :D