Sony PCG-SRX99 VAIO User Guide (primary manual) User Manual page 27

Standby mode
In Standby Mode the computer saves the current state of the system in RAM and switches off power to the CPU. The amber
power indicator flashes in this mode.
To activate Standby mode
1.
Press the key combination Fn+Esc. You can also use the PowerPanel
2.
Press any key to return to normal mode.
utility to enter Standby mode.
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