We have eight Lenovo G530 type 4446-38U that we use for meetings. If they are not touched for an extended period of time they go into sleep mode. We have turned off all power save functions and turned off screensavers on the account they use. We installed the newest updates, bios, and drivers and they still go into standby. The screen goes black, the power LED blinks, and the account is locked when you moved the mouse or hit a key. Is there any advice you can give us on how to keep this from happening.