Sony PCG-GRX670 User Manual page 96

Disconnecting a mouse or keyboard
You can disconnect a USB or PS/2
keyboard when the computer is in a power saving mode (Standby or Hibernate) may cause the computer to malfunction.
To disconnect the mouse or keyboard
 Unplug the USB cable from the USB port

Unplug the PS/2 cable from the Mouse/Keyboard (PS/2) port
mouse or keyboard when the computer is on or off. Disconnecting the mouse or
®
on the computer.
/ on the port replicator.
Page 96