Squeak,
Need more info. After sleep process, then reawaken, do you go straight into shutdown?
Is the problem occuring after a normal shutdown/restart?
Are any of the settings for Power Management changed from your selection after you have slept then reawakened?
Why do you have a screen saver selected at all? If you want to save power (money) have the monitor go into sleep mode by all means, however, there should then be no requirement for a screen saver to be selected.
Without further info, I suspect the activity of the screensaver may be interfering with the sleep process.
Just a further thought! What settings for power save are set in your BIOS? There should be nothing set up here, let Win98 (I assume this is what you use) control this. This can also cause strange things to occur!
Cheers
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When all else fails, read the manual!