Lenovo IdeaPad U510 Notebook - Manual (Page 16)

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Product specific Notices
To awaken your computer from a Sleep mode, press any key on your
keyboard. For more information about these settings, refer to your Windows
Help and Support information system.
Table 1. ENERGY STAR power-management features
Windows ® 8
Power plan: Balanced (plugged in)
• Turn off the display:
After 5 minutes
• Put the computer to sleep:
After 30 minutes
• Advanced power settings:
- Turn off hard disks:
After 20 minutes