Sony Vaio PCG-GRT290Z User Manual page 134

Why won't my computer enter Standby or Hibernate mode?
Your computer may become unstable if the operating mode is changed before the computer completely enters Standby or
Hibernate.
To restore the computer to normal operating stability:
1. Close all open programs.
2. Restart the computer. Follow these steps:
1.
Press the Windows key
2.
Press U.
3.
Press R to select restart.
3.
If the computer does not restart, follow these steps:
1. Press the Ctrl+Alt+Delete keys simultaneously. The Windows Task Manager window appears.
2.
Press and release Alt to highlight the menu bar, and press the Right Arrow
Down.
3.
Press Enter.
4.
Press R to select restart.
4.
If this procedure does not work, press and hold the power button or slide and hold the power switch until the
computer turns off.
.
key to select Shut
Page 134