Screen goes dark, hard drives still run. It used to go to standby when I shut the lid and wake up when I opened it. I checked the Bios, Nothing about ACPI in there. Under Device Manager\System devices, all ACPI devices say they are working properly. All drivers seem to be up to date. I've decided to disable the Standby via registry. (see attatched) disablestandby.reg BTW This is an old hp pavilion ze5568cl. Thanks nuhi. You da Man!