Did you know both FlashScan V2 and AutoCal have a low power mode which includes tuning off the LCD after a certain number of minutes of inactivity? The LCD will come on again as soon as the PC sends any info to the device via USB (i.e. each time they use the V2 to link an AutoCal) or if any of the keypad keys are pressed.
To setup low power mode in V8 Scan and Tune navigate to [F6: Devices] -> [F2: General]. Set the Low Power time field and Program your device. These settings will be activated from the next power up cycle.
This setting can also be managed on FlashScan using F4 Options->F1 Setup->F1 Edit Settings->Lo Power.