I installed the latest chipset and video drivers (6.70 and 81.85, respectively). I just uninstalled them and used Driver Cleaner Pro in safe mode and still, no standby...?
You said you just uninstalled them, If i understand correctly you have no stanby mode while you have no video drivers installed? For some reason you must have a driver installed to have standby, reinstall and try again .
Maybe your mobo doesn't support it. Hey my IBM PS/1 Consultant doesn't even have the power saving feature that turns off the monitor. It can't even shut down by itself lol.