I love standby, hit the moon button on key-board, computer sleeps. Hit power button and computer wakes up quickly.
Well now it sleeps but it does not wake up.
I have to pull the power cord. When it reboots I get the Desktop recovery white desktop screen, select OK and all is well. Computer works well, just sleep stopped working. Normal shutdown and reboot also OK.
(May be monitor but it seems to be working normally with its auto power-save function?)
Recently I tried to install a PCI USB 2.0/Fire-wire PCI card. The card did not work and sent it back, so I don't think that is an issue. I don't think that caused the problem but when the PCI card was installed the computer would not boot at all. Removing the card all was fine.
I also have recently tried the following hardware (which worked):
USB hub (computer is USB 1.1 and hub 2.0 but works fine)
USB to serial cable, which needed driver, seems to work as well
I played around with the power settings and no luck. I also tried hibernation, which I normally did not use. It is hanging up in hibernation as well.
I unplugged the USB hub and USB / Serial cable and that is did not help, still nothing, it hangs up.
Dell Dimension 8100
P4 1.8 Ghz, 256 MB